hybridfree/eevblog-posts huggingface dataset:
Looking for cell voltage sensing on 6S LiION pack, using 3v3 MCU - Page 1
Forum section: electronics / projects

author: Odd
author_rank: Regular Contributor
timestamp: March 19, 2024, 08:31:51 am
content: Right now, my project uses LM321 , which is driven of the battery voltage, to return the difference to the microcontroller: (see attachment)This requires more expensive opamp, and exposes the opamp to direct battery voltage/spikes/reverse polarity and so on.Please suggest a design where the opamp can work on much lower voltage - even 3v3 ?, and (preferably), return about the same voltage to represent each cell (up to) 4.4v (which should be about 3v2 for a 3v3 MCU)Maybe somebody already has the design, or have seen it somewhere?Thank you

author: BILLPOD
author_rank: Frequent Contributor
timestamp: March 19, 2024, 05:51:52 pm
content: Good Morning Odd, It would help if your design utilized one of these connectors to maintain a charge balance:https://www.amazon.com/RC-Battery-Balance-Extension-Charger/dp/B073ZG6QBZ
Looking for cheap Omron tacktile switch + Cap source / Alternative - Page 1
Forum section: electronics / projects

author: suku
author_rank: Contributor
timestamp: September 30, 2024, 12:17:51 pm
content: Hi Everyone,I am using an Omron switch in a product and the plastic cap has gotten really hard to source over the years. Nobody stocks is in decent quantity and the price nowadays is ridiculous! 7c for the switch and 20c for the plastic cap!https://www.lcsc.com/product-detail/Tactile-Switches_Omron-Electronics-B3F-4050_C86707.htmlhttps://www.lcsc.com/product-detail/Switch-accessories-or-Caps_Omron-Electronics-B32-1600_C231316.htmlIf anyone has a good replacement source for either the cap or the switch and cap with a similar look then I would really appreciate any recommendations.Ideally I am looking for a part that I can purchase from stock in 10.000+ quantity!Thank you!

author: Zipdox
author_rank: Regular Contributor
timestamp: September 30, 2024, 12:28:27 pm
content: Quote from: suku on September 30, 2024, 12:17:51 pmMaybe try contacting Omron directly. 10k quantity seems like it's reaching outside of the realm of conventional distributors.

author: suku
author_rank: Contributor
timestamp: October 01, 2024, 07:33:43 am
content: We tried contacting them but they sent us back to distributors... I guess 10k is a problematic order volume... Too much for catalog distributors, too little for the manufacturer...
Looking for cheap SPOC-06K-FSDN169 connector? - Page 1
Forum section: electronics / projects

author: Kjelt
author_rank: Super Contributor
timestamp: February 16, 2020, 10:17:04 pm
content: Looking for 5 pieces of SPOC-06K-FSDN169 connectors for a hobby project.If anyone has them or know a cheap (2nd hand) place to get them, it would be appreciated.Can't seem to find them under $30 a piece which is way overpriced.Hoped to gind a chinese store somewhere but no luck yet.Thanks,
Looking for circuit diagram Ac output voltage transformer module - Page 1
Forum section: electronics / projects

author: MadScientist
author_rank: Frequent Contributor
timestamp: November 03, 2015, 06:09:59 pm
content: I have several of these , has anyone come across a circuit diagram of the modulethanksthey are fromhttp://www.lctech-inc.com/Hardware/Detail.aspx?id=0993a811-bf85-4158-bc1f-80f2c2ff8b14
Looking for CMOS or CCD imager module - Page 1
Forum section: electronics / projects

author: Allen
author_rank: Contributor
timestamp: October 25, 2012, 04:40:42 am
content: I'm looking for an imager (CMOS or CCD) that has the clocking and readout circuitry already on board. Basically, I don't want to have to add the high speed circuitry to shift out and convert all of the pixels. I want an imager module where I can just issue a command (maybe through SPI or some other connection) and read out the image data at whatever speed my microcontroller can transfer it out. Most imagers I see require reading pixels out at and performing analog to digital conversions at around 20 MHz.Does anyone know of anyone that produces imager modules like this?

author: free_electron
author_rank: Super Contributor
timestamp: October 25, 2012, 04:22:44 pm
content: yep that exists. sparkfun has one i believe
Looking for compact fingerprint sensor - Page 1
Forum section: electronics / projects

author: PeterMadach
author_rank: Contributor
timestamp: May 30, 2017, 12:55:59 pm
content: Hello everyone!I'm looking for a fingerprint sensor for a project. In size, I'm looking for something that is similar to what mobile phones use, but I need a sensor I can interface with a microcontroller. Anyone has any tips where can I find one? I've looked on ebay, but so far I only found the big bulky optical one, and phone specific sensors I can't really do much.Thanks in advance!

author: EmmanuelFaure
author_rank: Regular Contributor
timestamp: May 30, 2017, 10:46:00 pm
content: https://www.sparkfun.com/products/11792

author: PeterMadach
author_rank: Contributor
timestamp: May 31, 2017, 03:39:23 pm
content: It's not bad, but still, im looking for even slimmer sensors. Kind of like these, for mobile phones (http://www.ebay.com/itm/New-Fingerprint-Sensor-Lock-and-Unlock-Button-Replace-for-Oukitel-U7-Plus-/201718920578?var=&hash=item2ef7627582:m:m3IScFZqmEnGCiebmCmyphQ), but with like proper documentation, so that I can connect it with a general micro/arduino. Or are these things like custom orders, not available to simple mortals?
Looking for connector ideas to carry USB + 24V (3A) - Page 1
Forum section: electronics / projects

author: guscrown
author_rank: Regular Contributor
timestamp: August 23, 2018, 03:49:05 pm
content: Hey guys,I'm looking for a possible replacement for this FCI connector:https://www.digikey.com/products/en?keywords=74355-1042which is part of the Powered USB family.So far it's been pretty good, but it has become more difficult to source, and lead times are pretty long, and considering that only FCI makes it, we are pretty much stuck.I'm looking for an alternative that I could use to replace it. This is for a printer in a POS system. Printer is a USB device, and it requires 24V with a max current consumption when printing of 3A.Any ideas?

author: Gribo
author_rank: Frequent Contributor
timestamp: August 23, 2018, 04:54:50 pm
content: In a pinch, D-sub can be used for USB 1.1. Alternately, you can abuse an RJ45 or a 10 position RJ50.

author: guscrown
author_rank: Regular Contributor
timestamp: August 23, 2018, 05:38:45 pm
content: The device is a USB 2.0 unfortunately, however the 10 position RJ50 doesn't sound that bad. What would be the best way to distribute the cores?24V: 3 coresGnd: 3 coresD+/D-: - 2 coresVBUS : 1 coreUSB_GND: 1 core

author: Gribo
author_rank: Frequent Contributor
timestamp: August 23, 2018, 08:29:00 pm
content: D+/D- should be close to each other (using a twisted pair). Do you really need a separate USB_GND?
Looking for connector suggestions - Page 1
Forum section: electronics / projects

author: nali
author_rank: Frequent Contributor
timestamp: July 08, 2015, 07:55:04 pm
content: HII'm putting together a bit of kit which will essentially comprise of a box mounted on a 3" diameter pole, with a remote sensor to attach to it by means of a multicore cable. I'm looking for a small connector to attach the sensor cable to the box. I'm envisioning the cable will be run inside the pole, so the combined connector shroud / strain relief / cable radius needs to fit within the 3".Cable will carry power (<=12V <100mA), 4 data + GndData will be fairly low baud rate 115k max maybe as low as 9600Needs to be IPx5 or IPx6 ratedSmaller is better as the connector will be threaded through a hole drilled in the poleneeds to be generally available in the UKNot critical what the host connector will be, it could be either a bulkhead mount cable type or a PCB mountThis will be a commercial offering although a lowish quantity, maybe a few hundred at a time.Would anyone care to give me some pointers or opinions towards connectors please? Not looking for specific part numbers - brands or series names/numbers will do.Thanks

author: helius
author_rank: Super Contributor
timestamp: July 08, 2015, 09:11:17 pm
content: Souriau micro38999http://www.mouser.com/new/souriau/souriaumicro38999/Hirose HR08D or HR34Bhttp://www.mouser.com/new/hiroseconnector/hirose-hr08d-connectors/AMP CPCAmphenol C16-Mhttp://www.mouser.com/new/Amphenol/c16mecomate/

author: nali
author_rank: Frequent Contributor
timestamp: July 09, 2015, 06:37:00 am
content: Cheers*... the Souriau product looks nice.Actually looking at the C16 range switched on a little light bulb somewhere - I can use cable pigtails with an inline connector that'll remove some of the constraints and make installation & maintenance a bit easier. A bit more expensive but that's not too bad as it's a high margin product.* Was about to insert emoticon until I realised it was holding not a pint of Guinness but a DMM... must get a better screen!
Looking for connector, this maybe good but what is it ? - Page 1
Forum section: electronics / projects

author: Simon
author_rank: Unknown
timestamp: July 21, 2014, 11:32:06 am
content: I need a connector that will go below -46 is IP68-ish rated and the socket would be about 10mm deep. I found the attached knocking around near my desk but I don't know the name, any ideas ?

author: wagon
author_rank: Frequent Contributor
timestamp: July 22, 2014, 12:53:08 pm
content: I've seen IP68 stuff from 'Techno'www.techno.itI have some at work, nice double-o-rings, rated to 300V (I think) and well made.

author: Simon
author_rank: Unknown
timestamp: July 22, 2014, 01:22:17 pm
content: I've ended up going back to TE's slimseal connector, small PCB mountable (best) and IP rated with the temperature rating I need.
Looking for consumer electronics reviewers and/or testers in San Francisco - Page 1
Forum section: electronics / projects

author: derGoldstein
author_rank: Regular Contributor
timestamp: March 09, 2018, 10:29:32 pm
content: (I wasn't sure which sub-board to post this in, so if it's the wrong one please let me know)A company I'm working with is looking for technical reviewers and product testers in San Francisco. It's a consumer electronics device but I can't go into more detail here.If you've done product testing and reviewing before, possibly on a blog or a forum or on youtube, DM me for details.
Looking for custom made  donut magenets - Page 1
Forum section: electronics / projects

author: JoeyG
author_rank: Regular Contributor
timestamp: June 26, 2021, 01:37:53 pm
content: Does any one have factory contacts that make strong magnets,Specifically a donut magenet-inside dia (hole) 12mm-outside dia 25mmthanks in advance

author: jonpaul
author_rank: Super Contributor
timestamp: June 26, 2021, 02:08:59 pm
content: quantity? Field stregnth? Target cost?Any custom will need NRE, MPQ and take some months....Expect minimum of 100K pcs to quotej

author: RandallMcRee
author_rank: Frequent Contributor
timestamp: June 26, 2021, 04:37:34 pm
content: Quote from: JoeyG on June 26, 2021, 01:37:53 pmWell, you have not specified anything that could help such a factory person should I have a contact!!The magnetic strength and magnetic orientation for two. In fact the physical size of a magnet is pretty far down the list of properties that you are going to be talking about.But aside from all of that your physical size is quite close to existing magnets for speakers. So you can find many without going for a custom order, I think. Unless there is money burning a hole in your pocket?Here are a few helpfully ordered by shape....https://www.magnet4less.com/neodymium-ring-tube-rare-earth-magnetsBut of course you may want a ceramic magnet, who knows?
Looking for Daikin's D3-net protocol phy IC... - Page 1
Forum section: electronics / projects

author: muthukural001
author_rank: Regular Contributor
timestamp: December 06, 2019, 07:46:12 am
content: Hi All,I am looking for Daikin's D3-net protocol details such as IC that is developed for this protocol's phy layer, what encoding it is using and the voltage swing of this protocol.If anyone have ideas about this, please shareThanks and Regards,Muthu
Looking for data on a Fairchild AN2002 silicon diode - Page 1
Forum section: electronics / projects

author: Kryten 2X4B
author_rank: Contributor
timestamp: March 10, 2022, 05:01:35 am
content: I'm trying to find a data sheet for a Fairchild AN2002 silicon diode. I don't know if this part has any special characteristics or if it is just a bog standard diode. I think would have been available in the late 1950's or early 1960's. Have found nothing on Google, and the earliest D.A.T.A. listings I have for diodes is 1981 so the part was probably obsolete by the 1970's. So if anyone has an old Fairchild data book with this part listed please let me know.Regards, Peter

author: andy3055
author_rank: Super Contributor
timestamp: March 10, 2022, 05:50:40 am
content: Probably this:https:www.radiomuseum.org/tubes/tube_an2002.html

author: floobydust
author_rank: Super Contributor
timestamp: March 10, 2022, 08:38:07 pm
content: I did find an initial press release for Fairchild all new micro-glass diodes AN2001, AN2002, AN2003Electronics Australia May 1968.As I interpret the text:AN2003 80V 100mA, VF=1.1V at IF=300mA, IR=5.0uA at VR=55VAN2002 50V 500mA, Vf=1.0V at IF=10mA, IR=5.0uA at VR=40VAN2001 60V 500mA, Vf=1.0V at IF=10mA, IR=10uA at VR=40V, CO=3pF at VR=0.I guess their main special feature is low capacitance, under 2pF and they were "First Australian made micro-glass diode"! Also used:https://archive.org/details/ar1949/AR_1970/mode/2up?q=an2002For replacements I would consider1N41502.5pF or1N4148has 4pF rating.

author: Kryten 2X4B
author_rank: Contributor
timestamp: March 11, 2022, 03:04:40 am
content: Yes the capacitance would be important as it was used in a ring modulator circuit, but the frequency was relatively low, 455kHz.Thanks for the information.Regards, Peter

author: T3sl4co1l
author_rank: Super Contributor
timestamp: March 11, 2022, 03:45:52 am
content: Mixer huh, balance between diodes may be the more important figure -- try to select them for similar Vf at given If. A DMM diode test is adequate for this.Tim

author: Kryten 2X4B
author_rank: Contributor
timestamp: April 05, 2022, 06:19:31 am
content: Yes, balance between the diodes is important in this application. The original circuit has a trimmer to "null" differences between the diodes.As these mixer circuits are missing from the equipment, I don't have any of the original diodes to test. So I'm going to use a modern replacements andmatch them on my Tek 577 curve tracer.
Looking for data on LN9T15 SMPS Controller IC - Page 1
Forum section: electronics / projects

author: SpiderElectronics
author_rank: Contributor
timestamp: September 26, 2014, 04:33:16 pm
content: I am looking for data on the LN9T15B Switchmode Power supply controller IC from Lii Semi.I know that it's an 8-Pin, 15W SMPS Controller IC, and I found the manufacturers page athttp://www.liisemi.combut that is about as far as I can get. The links to the datasheet on the manufacturers website don't work.Does anyone have access to a data sheet for this device?Anyone know if this device is any good? I have a few iPhone chargers which use it and all have blown the output rectifier (an SM820B Diode). I'd like to see the datasheet just for completeness, as I think the failures on the rectifiers are just down to over-current from faulty cables. These chargers don't have any output fuses in them.
Looking for data sheet MSM5806RS - Page 1
Forum section: electronics / projects

author: wolfi2611
author_rank: Newbie
timestamp: October 02, 2020, 03:50:41 pm
content: Hi,taking up an old repair project which has been waiting patiently in my basement for a copuple of years, I am searching for a data sheet of an ancient chip used in my early 80's ITT AM/FM tuner (https://www.radiomuseum.org/r/itt_amfm_tunner_hifi_8063.html). It seems to be at the heart of the PLL synthesizer circuitry.The chip code is MSM5806RS, Datecode is 0674 (!!). Guess it has beeen manufactured by Oki Semiconductors. I've been searching vainly for a couple of hours through the web ...no luck so far.Closest hit was the MSM5807, which seems to inherit a PLL as well - but according to package size and pinout it's fundamentally different (MSM5806: DIP 28 and a number of pins which are according to their labeling in the schematic not available with MSM5807, which comes in a DIL16 package.Thanks for any enlightment in advance!
Looking for datasheet for 6" LCD display TL060WV600 V2 - Page 1
Forum section: electronics / projects

author: up8051
author_rank: Frequent Contributor
timestamp: September 25, 2022, 12:29:57 pm
content: Looking for datasheet or pinout for LCD display TL060WV600 V2, 40-pin connector 800x480 resolution.Display is used in photo frame FP6010 / Intenso3960800.
Looking for datasheet for an old display: LCM-5483-24NTK - Page 1
Forum section: electronics / projects

author: silencer_ar
author_rank: Contributor
timestamp: August 25, 2023, 01:00:21 am
content: Hello!I've been looking for the datasheet to the Sanyo LCD display, LCM-5483-24NTK from an old 386 notebook for a while now. But I can't find it anywhere, I've found the datasheet for the 24NHK instead, but even though they look alike, I don't have the confidence that their datasheets aren't different somehow. I'd like to discard a problem with the connectivity before even considering buying one as they're not cheap.Do you know if they are the same? (maybe the 3 letter code means something else unrelated to the lcd), or do you happen to have a datasheet for the LCM-5483-24NTK?thank you so much!

author: coromonadalix
author_rank: Super Contributor
timestamp: August 25, 2023, 01:19:51 am
content: well you can do comparaisons on the pcb with the datashhet you have found

author: silencer_ar
author_rank: Contributor
timestamp: August 25, 2023, 01:49:19 pm
content: I was just able to get a LCM-5483-24NHK. Aside from the backlight connector they seem to be the same. It's not working either, so maybe the problem is elsewhere. Thank you!
Looking for datasheet for bar LCD displays 12,6" and 14.0" - Page 1
Forum section: electronics / projects

author: up8051
author_rank: Frequent Contributor
timestamp: September 08, 2023, 03:48:45 pm
content: I'm looking for datasheet for :NV140DQM-N51 1920x550 eDP.NV126B5M-N43 1920x515 eDPProbably available on panelook.com but I don't have an account there.

author: up8051
author_rank: Frequent Contributor
timestamp: September 09, 2023, 07:28:05 pm
content: Nobody will help? :'(

author: DavidAlfa
author_rank: Super Contributor
timestamp: September 09, 2023, 07:40:25 pm
content: Create an account in 45 seconds instead being so lazy!Edit: You have to pay anyways

author: sd
author_rank: Unknown
timestamp: September 09, 2023, 08:02:36 pm
content: I sent you a PM with the datasheet for the first panel. I can't find a datasheet for the second one on panelook.

author: up8051
author_rank: Frequent Contributor
timestamp: September 09, 2023, 09:32:08 pm
content: Quote from: sd on September 09, 2023, 08:02:36 pmThank you.Sorry my mistake, the second is NV126B5M-N42 or NV126B5M-N41

author: amyk
author_rank: Super Contributor
timestamp: September 10, 2023, 03:27:56 am
content: There used to be a way to bypass registration and paying for downloading from panelook but I tried now and it doesn't work anymore(Last time I used that method was around 2015 and it worked then.)Is there any specific information in particular you're looking for?

author: up8051
author_rank: Frequent Contributor
timestamp: September 10, 2023, 11:22:34 am
content: I want to connect one of these displays to the FPGA using my own converter based on the NewCoSemi NCS8801 chip:FPGA -> LVDS NCS8801 -> eDP DiaplayThe converters included with these displays (Aliexpress sellers) are too large and I want to integrate everything on one PCB.
Looking for datasheet of old Siemens capacitors, inductors, tranformers 1960-70 - Page 1
Forum section: electronics / projects

author: MichalZ
author_rank: Contributor
timestamp: April 16, 2020, 02:24:16 pm
content: Hello,I'm looking for some catalog or datasheets of Siemens foil capacitors from year 1960 - 1970 like:B21990-A0704-G1B25990-A205-K1B31096AB31190-S2B31190-K9B31212JInductors, small signal trafos, like:621 C 467621 C 469621 D 1118621 D 1116Thank youMichal
Looking for datasheet on CSM10093AN - Page 1
Forum section: electronics / projects

author: Timmy73
author_rank: Newbie
timestamp: August 16, 2020, 11:03:03 pm
content: Hey yall. So a while back I tore down an answering machine that had a speech synthesis feature, and recently I was taking a look at the board to see if there was anything useful. I was looking for the chip responsible for the speech synthesis and I think I have found it.The chip is a CSM10093AN.The problem is that I cant find any datasheet or anything online for it and was wondering if anyone could help me out.Thanks!
looking for datasheet PS8321 or PS8331 from Parade Technology - Page 1
Forum section: electronics / projects

author: free_electron
author_rank: Super Contributor
timestamp: September 07, 2018, 02:25:20 pm
content: These are very specialistic Displayport multiplexers with on board timing equalizers and output drivers.I'm trying to build a displayport KVM. nothing in the market satisfies my needs. However, most of the KVM's out there use this chip and i can get the chips, no problem. But i need the datasheet ( they talk I2C ) ...i want to make a multiplexer that can switch between 3 computers. Each computer has 3 displayports and i have 3 monitors. so 9 in , 3 out . the switch includes a USB3.0 hub with 6 user accessible downstream ports and a seventh special function port.The idea is to switch keyboard , mouse, spacemouse, smart keypad , digitizer over together with the displays. I have everything worked out. , but i'm in doubt between using TI displayport chips together with Pericom redriver chips ( i'm driving long cables so i want to clean up the eye patterns on the displayport ) or these parade tech chips.I've bought a number of 2 channel dp switches and studied many schematics of hi end laptops, graphics cards and docking stations. They all use Parade chips. nobody mucks with TI or Pericom or the other 'known' brands. Apparently the Parade chips have more features and some secret sauce that nobody else has for this purpose.

author: sd
author_rank: Unknown
timestamp: September 07, 2018, 08:15:32 pm
content: TI multiplexers and Pericoms redrivers should work fine.I have used TS3DV642 and PI3DPX1203 for DP 1.2, 4K@60Hz.CPU DP and MXM GPU DP -> ~20cm PCB trace length - > TS3DV642 -> ~10cm PCB trace length -> FX15SC 51 pin connector -> ~40cm microcoax custom cable (extremely high loss compared to the cheapest 2m DP cable) -> FX15SC on a rigid flex PCB -> PI3DPX1203 -> DP connector. Worked fine after tweaking the PI3DPX1203 a bit.

author: free_electron
author_rank: Super Contributor
timestamp: September 07, 2018, 10:20:17 pm
content: Problem is that the pericom chip does not take part in the retraining ( it does not listen to the aux channel ) you need to futz with it using settings pins or i2c.The Parade chips and certain TI chips listen to the commands on the aux channel and take part in retraining.I had that exact pericom chip in mind.

author: sd
author_rank: Unknown
timestamp: September 07, 2018, 10:48:46 pm
content: It's transparent to link training which sometimes can be a good thing. In my case I just used the redriver to compensate for GPU -> DP source connector losses.
Looking for DC motor driver topology - Page 1
Forum section: electronics / projects

author: Miles Teg
author_rank: Regular Contributor
timestamp: September 13, 2022, 06:20:47 pm
content: Hello!After quiting temporaly electronic engineering end of 2019 (how convinient...) I'm back, in the state of electronic market you all know.So for a personnal project of converting an old mower robot (RL2000) to GPS RTK, I'm studying building my own electronic for it. (and with help of a SW engineer friend)I don't have great experience in motor control, and the components choice actually is quite... limited.So in my project there is3 mowing motors (driven originally by one BTS7960 40A peak for the 3 motors), 1 way2 wheels driving motors (originially 2 BTM7810k 42A peak) reversible of course.(example project:https://forum.ardumower.de/threads/robomow-rl2000-m%C3%A4hmotoren-radmotoren-m%C3%B6glich.22614/)I don't think the overall power should exceed 150W. And its originally powered by a 24V 20Ah battery.Have you any advice of a topology available on the market?I was first looking for a highly integrated as the Ti DRV8873 (https://www.ti.com/product/DRV8873)or more basic Infineon TLE7209-3R,and now I'm looking for the half bridges.But nothing actually available or convincing me.Please help, thank you!

author: Miles Teg
author_rank: Regular Contributor
timestamp: September 13, 2022, 06:49:15 pm
content: More information on motors ratings:Quote

author: Miles Teg
author_rank: Regular Contributor
timestamp: September 14, 2022, 03:12:17 pm
content: Hello! After going through what's actually available on main shops, I think I will make a try on theTi DRV8432DHSSOP362 × 7-A Continuous Output CurrentIntegrating Over current protection with adjustable value.Will need heatsink.Do you see any catch with this chip for my application?Thank you.
Looking for design suggestions for a Bluetooth 'Hub' - Page 1
Forum section: electronics / projects

author: EvilSOB
author_rank: Newbie
timestamp: August 29, 2020, 04:09:37 am
content: Hiya all.Im looking for ideas for a home project for a Bluetooth HUB.My problem is I have a smart tv that only allows ONE bluetooth device at a time,but I have two pensioners who need BT headphones.So my idea is a BT 'hub' that links to the TV as a reciever, and is capable of linking totwo (or more) devices (eg headphones) as a 'multi-channel' transmitter.My electronics skills are fair to middling, so I am after a design that is largely splicingtogether various modules to achieve my result. Im good with through-hole work,but try to keep SMD off the table. My eyesight aint what it used to be.I also USED to be able to program MCUs, but Im going to be VERY rusty with that.But if you have any ideas/suggestions that are beyond my skills, mention them anywayas I am not afraid of a challenge...So if anyone has any projects out there, or even 'finished' units, please link me to them too.I am also open for further discussion here for any suggestion of clarification.Thanks muchly,EvilSOB ... Australia
Looking for eInk display manufacturers  - Page 1
Forum section: electronics / projects

author: Jackster
author_rank: Frequent Contributor
timestamp: June 12, 2022, 01:14:40 am
content: Hi allI am trying to find an eink display manufacturer who could supply me with these two screens.Screen 1, approximately 10" or 25x20cm.Front light. No touch. B/W. Partial refresh.Screen 2, approximately 4-5". Front light. Touch. B/W. Partial refresh.I would love for screen 1 to be DES full colour but the supplier I have talked to have all said that they are a while off from being on production.https://m.alibaba.com/product/1600221089848/10.1-inch-Electronic-paper-eink-display.html?__sceneInfo=%7B%22cacheTime%22%3A%221800000%22%2C%22type%22%3A%22appDetailShare%22%7D&from=AndroidThanks in advance for any recommendations.
Looking for eMMC interposer - Page 1
Forum section: electronics / projects

author: v_k
author_rank: Newbie
timestamp: July 25, 2023, 11:11:06 am
content: Hello, I need an interposer with the minimal possible footprint, ideally it should have the same size as a FBGA-153 eMMC chip (11.5x13.0 mm). I've found three suitable models so far: Advanced Interconnections BGA socket adapter (price unknown, "please contact for a quote"); Samtec "Z-Ray" (same "please contact") and Ironwood "Grypper" ($709/piece).Did you use any of these and could recommend any? Does Advanced or Samtec accept small orders (<=5 pieces)?Do other eMMC interposers exist? Preferrably with a lower price, few hundred bucks is OK but $700/piece is just way too much.Thanks in advance.

author: v_k
author_rank: Newbie
timestamp: August 12, 2023, 10:35:23 am
content: Update, in case anyone interested.I have also found a manufacturer of cheap interposers in China, just $600/piece with a minimal order quantity of just 1 piece, search for "Sireda Tech BGA socket" (not advertisement). Their interposers would be the best choice in terms of price and usability, unfortunately those models are not suitable for my particular PCB as I have high profile components close to the eMMC chip.As for the other manufacturers,> Advanced Interconnections BGA socket adapter- appeared not suitable for my project; did not ask for the price.> Ironwood "Grypper"- appeared most suitable for my project, unfortunately the price is quite painful for a small startup - the minimal order quantity is 4 pieces so prepare to pay ~3000 USD.> Samtec "Z-Ray"- did not contact them as I've decided to go with the "Grypper"
looking for ESD Gun ideas teardowns - Page 1
Forum section: electronics / projects

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: August 13, 2020, 03:56:10 pm
content: Hi,The price of commercial ESD guns is quite high, given that you charge a capacitor with high voltage and then you discharge into the tip of the probe.I know people build them with piezo lighters.I have also found this video on Youtube:This is by forum memberAllTheGearNoIdeaI have also seen Joe Smith using his homemade ESD gun to torture DMMs. But there are no details of the unit.Does anybody know of any useful teardowns or other references?Regards,Jay_Diddy_B

author: coppice
author_rank: Super Contributor
timestamp: August 13, 2020, 04:43:58 pm
content: Quote from: Jay_Diddy_B on August 13, 2020, 03:56:10 pmI'm not sure people build them with piezo lighters. They just use piezo lighters to create a crude, poorly controlled, hit as a poor substitute for proper tools.The 10PPS and 20PPS modes of commercial guns are really important for serious testing. Offering those modes it probably where it gets expensive.

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: August 13, 2020, 04:50:45 pm
content: Thanks!!(I know people who what to like to set their projects on fire !!) probably not a good idea to have lighters in the lab.I can make the high voltage easily enough. I am not sure what people use for the switch.I think a triggered spark gap is probably the most robust. Let us see where thread goes.Regards,Jay_Diddy_B

author: OM222O
author_rank: Frequent Contributor
timestamp: August 13, 2020, 05:04:21 pm
content: high voltage applications usually use IGBTs, couple that with pulse rated caps and you should be set.

author: coppice
author_rank: Super Contributor
timestamp: August 13, 2020, 05:08:00 pm
content: Quote from: Jay_Diddy_B on August 13, 2020, 04:50:45 pmMost guns seem to use a capacitor shuttling in a vacuum. Charge the cap up - dump the charge - charge the cap up - dump the charge - etc. They have an accurately controlled high voltage supply for the charging, and give the cap long enough to fully charge. So when they dump the charge they get a well controlled shot of charge to the probe tip. I think the just use a series resistance to control the pulse shape (i.e. a simple RC filter). The videos from AllTheGearNoIdea use a vacuum relay to switch the cap, but the shuttling sound most guns make doesn't sound like a relay in action. Some of the high end guns are now silent, like they may be using fully electronic switching.

author: AllTheGearNoIdea
author_rank: Unknown
timestamp: December 03, 2020, 07:27:14 pm
content: I think these are interesting if slightly dangerous projects. How useful they are in the real world of testing is difficult as they cannot be easily characterised without special equipment and a brave heart. Still making spark is fun and tomorrow you may get hit by a bus! Have fun.
Looking for ESS ES3890F Documentation  - Page 1
Forum section: electronics / projects

author: zmetzing
author_rank: Contributor
timestamp: July 17, 2025, 03:36:33 pm
content: I have a Linksys PAP2 VoIP adapter that I no longer use, so what did I do? I took it apart!Inside, we find an ES3890F "VISBA Video CD Processor". There is no information on this chip, other than the Product Brief (linked here).It's a long shot, but does anyone have more information on this chip such as the reference manual, a full datasheet, etc?(PS: Pictureshttps://www.insidegadgets.com/2018/03/04/inside-the-linksys-pap2-voip-phone-adapter-made-in-2010-troubleshooting-powering-on-issues/)Thanks,--- Zach
Looking for experience with LC filter for induction motor drive  - Page 1
Forum section: electronics / projects

author: Miyuki
author_rank: Frequent Contributor
timestamp: August 02, 2021, 01:39:10 pm
content: Hi,just looking for experience with propper designing of LC filter after VFD for induction motorit is just a "small" unit for a 3-5kW motor and it uses a SiC output stage with up to 100kHz PWMcan I just put a 10kHz cut off LC filter and forget about it?
Looking for feedback on my Android App (solar irradiance meter + solar tool) - Page 1
Forum section: electronics / projects

author: Julian Jameson
author_rank: Newbie
timestamp: June 21, 2015, 09:36:21 pm
content: I originally wrote the app just to interface with the solar air heater control systems we develop (Okapi brand), for real time monitoring and data logging.However, the usual feature creep turned the app into an equivalent of a solar multifunction tool with irradiance meter (uses the light meter on the smartphone or tablet to estimate watts per square meter of solar irradiance).I suppose I've made some brave claims by doing this? I don't think anyone has done this before, but anyway, why not throw me and the app into the lions den here and let you guys take a look at the app, question the claims or offer further suggestions to improve it?The promo video is here:And the Play store listing, with full feature list, is here:https://play.google.com/store/apps/details?id=com.greenhillenvirotechnologies.androidsolarairheatercalculator(Ok, ok, I know this is an electronics forum, not an app forum! But the main purpose of the app is to link up with our electronic systems... plus, using a smartphone light meter to determine irradiance definitely uses electronics!)
Looking for Freescale/NXP processors: MC9S12XEP100xyz - Page 1
Forum section: electronics / projects

author: AndersJ
author_rank: Frequent Contributor
timestamp: August 20, 2021, 04:05:40 pm
content: I need these processors:* MC9S12XEP100CAG* MC9S12XEP100VAG* MC9S12XEP100MAGQuantity: Dozens to several hundreds.Zero stock, "everywhere".All suggestions appreciated.
Looking for good handheld LCD resources - Page 1
Forum section: electronics / projects

author: bkucenski
author_rank: Contributor
timestamp: December 27, 2017, 12:10:20 am
content: http://www.handheldmuseum.com/That website has a nice list of the various handheld LCD games that were ever made and has some manuals but is very lacking on much useful information like a clean image of all the sprites on the screen.That video has a very good clean image with all the sprites at about 3 seconds in and a decent amount of game play to kind of figure out what's going on.I'm wondering if there's a good resource for popular (at the time) handheld LCD games with good images of all the sprites and game play information.I'm looking to recreate some of them using an ArduinoThanks
Looking for good references on building SDR? - Page 1
Forum section: electronics / projects

author: rwgast_lowlevellogicdesin
author_rank: Frequent Contributor
timestamp: July 20, 2015, 06:26:56 pm
content: I have been thinking about building my own simple SDR to start with, I have found some project using an arduino, it has alot of code but not alot of explanation. Where I am really getting hungup is bandwidth and tuning. I know alot of SDRs use front end tuner chips, but some do not. For example there is a project post about using the 8 core propeller counters to tune in AM radio. Is that what things like the HackRF etc are doing? Im also wondering how you get any decent bandwidth to the PC if you choose a micro with out HighSpeed USB, is there any kind of parrallel bus to USB interface or something that can pull the 480mbits of high speed usb?If anyone knows of any sites that step through a lot of SDR hardware concepts whether they be USB or audio card based id appreciate it. Ive been looking and most stuff is just code and schematics.I would love to use one of those new parallela boards to implement a broadband portable SDR with LCD... but thats kind of a pipe dream im really just looking to figure out how to maybe build a VLF to 25mhz USB based radio.

author: Fank1
author_rank: Regular Contributor
timestamp: July 20, 2015, 11:35:53 pm
content: Not the software but look up "YU1LM"
looking for GOOD  signal relays - Page 1
Forum section: electronics / projects

author: 001
author_rank: Super Contributor
timestamp: September 11, 2018, 09:43:31 am
content: I`m looking for GOOD signal relaysfor signals up to at least 100kHzminimal resistance and capasitanse requiredWhat common models will be ok for me?Thanx

author: Dave_C
author_rank: Contributor
timestamp: September 11, 2018, 10:48:05 am
content: On the top of my head: FTR-B3 series from Fujitsu/Takamisawa.Datasheet:https://www.fujitsu.com/downloads/MICRO/fcai/relays/ftr-b3.pdfThey specify it to have max 75mOhms of initial resistance but I can't find any capacitance specs.Insulation and insertion loss vs frequency is specified ( attached screencaps from the FTR-B3 datasheet )It is specified for at least 1MHz so at 100kHz it will perform even betterIf you need better frequency characteristics then you would need to use a RF relay and they are expensive.You might also find something even cheaper that suits your application.

author: digsys
author_rank: Unknown
timestamp: September 11, 2018, 11:21:13 am
content: I've been using these - MSS21A12 - for over 25 yrs. They have mercury, so you know they're good :-) .. elcodis.com/parts/5358447/MSS21A12B.html#datasheetCapacitance - 1.5 / 3.0pF Contact Resistance ~50-75mR 200Hz 500x10^6 + operationsIf they're suitable, I have many tubes at EOL you can have, only ~10-20 million operations left - I run them at 5Hz 24/7 for ever :-) picking up RFIDIt's cheaper to give them away than the cost of recycling mercury !!There are dozens of other types in their catalogue as well.

author: 001
author_rank: Super Contributor
timestamp: September 11, 2018, 11:44:52 am
content: Thanx a lot!

author: coppercone2
author_rank: Super Contributor
timestamp: September 11, 2018, 04:10:52 pm
content: there are also RF relays which are coaxial and shielded and everythinghttps://www.mouser.com/Electromechanical/Relays/High-Frequency-RF-Relays/_/N-5g33/
Looking for guidance on FCC requirements - Page 1
Forum section: electronics / projects

author: dmc0162
author_rank: Newbie
timestamp: November 18, 2017, 05:03:09 am
content: Does anybody have a thorough understanding of FCC requirements for consumer products? I have been researching this for about a week now, and I am trying to understand the various exceptions for kits, sub-assemblies, etc., and I am feeling a bit lost.We are developing a product that uses a fully certified Qi wireless charger, and I have a few scenarios that I am wondering about. From what I understand, if we use a certified Qi board/coil module, we do not need to do FCC testing at the component level, but at the finished assembly level(?), to verify everything still complies after our integration into the system?Another possibility for this particular application is to use a fully off-shelf, finished goods charger and incorporate it into our product. This would be a unit that is still in its original enclosure, and just integrated into our case, with no other emitters. In this case, do we need to still certify the product, even if we are using a fully certified, finished product which is still in its original enclosure?Thank you!

author: Mr. Scram
author_rank: Super Contributor
timestamp: November 18, 2017, 05:44:27 am
content: What is the exact definition of "computer" in regards to the FCC? Is that full on desktop and laptop computers, or do mobile devices (phones, ARM tablets) or maybe even microcontrollers of any kind count too?

author: Emil
author_rank: Regular Contributor
timestamp: November 27, 2017, 01:04:04 pm
content: Quote from: blueskull on November 18, 2017, 05:14:33 amIs this still the case if a design uses a pre certified module, but has no clocks over 9KHz outside the module?
Looking for heater control circuit diagram. - Page 1
Forum section: electronics / projects

author: avitsur
author_rank: Contributor
timestamp: January 03, 2022, 01:12:14 pm
content: Hi, I have a 6kw heater element fed by 230vac and I would like to control and adjust it's output. I've ordered a device from Aliexpress but it's no good.I hope to find a circuit diagram based on scr or a triac. if you have/know where I can find such a circuit diagram, please let me know.

author: kaevee
author_rank: Regular Contributor
timestamp: January 03, 2022, 02:19:10 pm
content: Quote from: avitsur on January 03, 2022, 01:12:14 pmCheck out Andy Brown's reflow oven controller.https://andybrown.me.uk/2015/07/12/awreflow2/You can replace the triac with higher rating and modify the firmware to your needs.

author: rpiloverbd
author_rank: Regular Contributor
timestamp: January 04, 2022, 02:22:25 pm
content: This may help:https://www.electroschematics.com/smart-heater-controller-circuit/
Looking for heatsink detailed dimensions from ebay module - Page 1
Forum section: electronics / projects

author: Fire Doger
author_rank: Regular Contributor
timestamp: November 13, 2017, 04:04:37 am
content: Hello,I am making a dev board for practicing control theory (MPC mainly) based on temperature using peltier.I have found some cheap modules onEbayto use their parts but unfortunately some information (Holes pitch in heatsink) are missing, I want to mount the whole setup on PCB to be more robust.Unfortunately waiting 30 days for heatsink and then 30 days for pcb isn't a solution. I could make slots rather than holes but I was wondering if anyone knows the hole size and pitch to avoid it. Sellers doesn't help...Thank you,Below is a pic of what I want to do.Stefanos
Looking for help identifying a compatible connector. - Page 1
Forum section: electronics / projects

author: Geek42
author_rank: Newbie
timestamp: November 23, 2016, 02:03:28 am
content: I'm playing around with a small addon for the original NES(Nintendo Entertainment System). I decided it would be better to not require people to solder on and modify their hardware if possible(not every modification I have can do that, but this one can).My problem is finding a connector that is compatible with the existing ones in the box. I was able to find the right connector for the game controllers(if you are wondering: JST 2.0 PH 7-Pin work perfectly on both sides), but have been unable to find one that works with the power/reset/LED connector.Images of the connectors, blue ones are the mystery:https://goo.gl/photos/pXLQLB2ZGm7kojcf7https://goo.gl/photos/poZegZw1xjXMtffT7My best measurements of the pins have 5mm spacing on center, 7.5mm for the larger gap, but it all could be imperial and totally wrong...There is a logo I don't recognize on the connector, it unsurprisingly happens to be the same as on the power and reset switches here:https://goo.gl/photos/jsRD7mwESSwbZx8u8But no company name on these. The round logo raised up. Looks like a ring of 6 angled sections, maybe an outline of a 6 sided star.This is just for a hobby, maybe sell something, but nothing that would make me a profit. I have spent way too many hours(days) looking online. The game controller connectors were deceptivly easy to find and led me down the rabbit hole of believing I should be able to find it. Any help or direction(even a company name) would help, I don't mind trolling the catalogs from there. (Of course if you do know the exact connector, that just sames me a bunch of time.)ThanksGeek42
Looking for help on a tri-ax accelerometer. - Page 1
Forum section: electronics / projects

author: CatalinaWOW
author_rank: Super Contributor
timestamp: January 24, 2017, 07:12:11 pm
content: Looking through a junk box I found the pictured accelerometer. So far a web search has turned up the following. A. They go for big bucks, even used. B. The most common web hit is as part of the equipment list for an aircraft - anything from a business jet up through a Boeing 747. C. A Chinese version of a sales brochure showing general operation and some very nice specs. D. A national stock number.I would like to put it to work doing something fun, but haven't been able to turn up a pin out on the 10 pin circular connector. I know that it uses 28 V, probably DC, and has three channels out. Ohming the contacts pairwise hasn't made anything jump out at me.Anybody have any information they can share? Just knowing where to apply power (And whether it is DC or AC) would possibly be enough to get me going.
Looking for help understanding how this discrete design works. - Page 1
Forum section: electronics / projects

author: Momomo391
author_rank: Newbie
timestamp: October 01, 2024, 02:18:53 pm
content: There may be a mistake that Q1 and Q78 could be NPN transistors with their bases and collectors flipped from how they are in the photo but im not sure. Any help is super appreciated! I believe this is suppose to act as an expo converter but im confused on how it works or if the schematic is off??

author: magic
author_rank: Super Contributor
timestamp: October 01, 2024, 04:01:51 pm
content: The upper part is a simple opamp wired for unity gain. The lower part is certainly wrong, inputs generally don't go to collectors nor do outputs come from bases. There is no source of base current into T30, so something surely is wrong with polarities of D5 or T24, or other components are still missing.

author: Momomo391
author_rank: Newbie
timestamp: October 01, 2024, 04:49:17 pm
content: Would it make more sense if Q1 and Q78 were NPNs and had their collector and base connections swapped??

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 01, 2024, 05:58:19 pm
content: No, the problem is diode polarity vs. T24 collector. Both are sinking current.Q78 base doesn't make any sense for output. T38 emitter perhaps makes more sense as an output, or T23 collector. That's not to say a dependent current won't be available from Q78 base, but it's a strange way to do things if so. With a completely anonymous "Output" (and "Input"), and no mention of application, we have no way to evaluate whether that's how it's being used.Tim
Looking for help with arduino nano and display - Page 1
Forum section: electronics / projects

author: Crambone
author_rank: Frequent Contributor
timestamp: December 15, 2019, 11:58:37 pm
content: Seen this on a transceiver and was told it uses arduino nano by hooking to PLL circuit and tx line.Well let’s just say I don’t even know what Arduino Nano is or what display to use.Any guidance on were to get display, arduino nano and how to code/ program?

author: Kerlin
author_rank: Regular Contributor
timestamp: December 16, 2019, 07:15:00 am
content: Do tell ?Yes they do work together, does that help ?
Looking for hi side switch 24V, 100 to 500 mA, short circuit protected - Page 1
Forum section: electronics / projects

author: AndersJ
author_rank: Frequent Contributor
timestamp: December 05, 2020, 05:35:31 pm
content: Logic level input.Any suggestions?

author: Benta
author_rank: Super Contributor
timestamp: December 05, 2020, 06:01:17 pm
content: Infineon 24 V PROFET:https://www.infineon.com/cms/en/product/power/smart-low-side-high-side-switches/high-side-switches/

author: Zero999
author_rank: Super Contributor
timestamp: December 05, 2020, 06:03:19 pm
content: How many channels? The MIC2981 has eight.https://ww1.microchip.com/downloads/en/DeviceDoc/mic2981.pdf

author: tonyh88
author_rank: Regular Contributor
timestamp: December 05, 2020, 06:06:41 pm
content: The more details you give the better we can answer... so what exactly do you want to accomplish...What are you switching?What are you driving the switch with?Switching speed?Isolation requirement?That being said:You can use SSR mosfet relays as high side switch:https://www.digikey.ca/en/products/detail/omron-electronics-inc-emc-div/G3VM-41GR8-TR/2755205Mechanical relay with 5V and 3V coil also existslogic level P channel mosfet could also workFuse on the line to protect from short circuit