hybridfree/eevblog-posts huggingface dataset:
MIL-M-38510 Cross Reference - Page 1
Forum section: electronics / projects

author: blackbird
author_rank: Regular Contributor
timestamp: January 15, 2019, 09:51:40 pm
content: Hello,I've got a small collection of electronic components with part-numbers starting withJM38510orM38510. These part-numbers are not common outside the military (I guess).Some of these I have identified and could be substituted by non-Mil-spec variants, e.g. 74193 Binary Counters or LM741 OpAmp.Using the Big-G search engine I couldn't find any document which contained a cross reference between these M38510 numbers and their non-Mil-spec counterpart.Does such cross reference list exist?

author: helius
author_rank: Super Contributor
timestamp: January 15, 2019, 10:57:37 pm
content: The military grade counterpart of the 74 series is the54series.https://www.ti.com/pdfs/hirel/space/TI_Natl_LS_X-Ref.pdfhttp://www.ti.com/pdfs/hirel/mltry/National_Semi_JM38510_Logic_Cross_Reference.pdf

author: rfeecs
author_rank: Frequent Contributor
timestamp: January 15, 2019, 11:15:46 pm
content: "This search provides a cross-reference of microcircuits covered by Standard Microcircuit Drawings, MIL-M-38510 specifications and Vendor Item Drawings":https://landandmaritimeapps.dla.mil/programs/smcr/

author: blackbird
author_rank: Regular Contributor
timestamp: January 16, 2019, 08:44:54 pm
content: Quote from: helius on January 15, 2019, 10:57:37 pmThe first document only list a few components, already found this very short list (just 1 page) which listed none of the components I have. I knew the 54's are mil grade counterparts of the 74's, already got a few 54's in the same collection. The second document is useless for me, it is nothing more than a two column list where e.g. JM38510/31101BFA is cross referenced to...... JM38510/31101BFA....Quote from: rfeecs on January 15, 2019, 11:15:46 pmThis site did not popup because of some HTTPS certificate errors. Now accepted the error temporarily so I can access the site, seems very useful. Not a cross reference document to be used offline but at least a way to see what those 'mysterious' part-numbers actually refer to. I have e.g. some JM38510/01309BEB components, although this site does not find the BEB variant it does tell me M38510/01309BEA is a SL54193/BEA. I'm sure I can safely assume the BEB variant could be a SL54193/BEBJust an update: Following the link provided by rfeecs the lookup tables used by that website can also be downloaded as a spreadsheet so it is usable offline.Thank you helius and rfeecs
MiLESEEY D9 Pro laser distance measure: ideas for interfacing via bluetooth? - Page 1
Forum section: electronics / projects

author: JBeale
author_rank: Frequent Contributor
timestamp: August 10, 2025, 12:18:03 am
content: I got a "MiLESEEY D9 Pro" laser tapemeasure ("MiLESEEY-D9-Professional-Measurement-Touchscreen" Amazon: B0CS67S919 ) in part because screenshots of the Android app showed it could transfer each measurement with time/date stamp to my phone. I assumed that, of course, there would be an option to simply export that data as a .csv text file. As it turns out, that does not appear possible. There is an export function, but it requires first manually transferring each and every measurement from a limited mini-scrolling window into a limited, mini-spreadsheet using separate touchscreen control actions for every single data point, and it's up to you to keep them in order and not skip any, AND it doesn't even transfer the time/datestamp at all. I could hardly believe it.Question: is there any hope of reverse-engineering the Bluetooth protocol here? I'm worried because I see there is a 3rd-party project that works with many bluetooth distance metershttps://www.imagemeter.com/manual/bluetooth/devices/but a select few are listed as "do not support" and this is one of them.An alternate route might be to work through the confusingly generic "SmartLife" home-automation app they have tacked this device onto. It will display all the laser measurement data from previous sessions when opened, so that information is obviously in some database that the app accesses, but maybe hard to get into (?)

author: JBeale
author_rank: Frequent Contributor
timestamp: August 25, 2025, 08:04:51 pm
content: In this case, the correct choice seems to be to get a different model. I found an OEM distance measuring device claiming 80 m range, that does what I want under direct program control (serial port), and in fact it even offers 0.1 mm resolution (!) although of course not 0.1 mm accuracy. It does show 20-point standard deviation varying between 0.2 and 0.7 mm in a data set of 4000 points, something I did not realize was available from this class of device at all. It appears able (with averaging) to repeatably resolve distance changes of less than 1.0 mm. Initial testing indicates the published specs are roughly correct, at least over short distances like 3 meters.I find it unfortunate that the unmarked module seems to have no brand and no model number, so it cannot generally be referred to as a specific device. I'm not sure why that's an advantage to whoever made it, but I suppose it must be.Sold ashttps://www.aliexpress.us/item/3256805197937779.htmlunder the heading "20hz High Accuracy 80m Laser Sensor Range Finder Distance Measuring Module TTL Interface Ardunio"-john
milled/machined sockets - Page 1
Forum section: electronics / projects

author: alank2
author_rank: Super Contributor
timestamp: February 15, 2018, 02:58:00 am
content: Curiously, what is the retention/spring mechanism of these type of sockets? Like the mill max ones where it looks like there is a circle and I can almost see another metal inside that is rolled. I get how the wiper style sockets work, pressure between the two surfaces hold the chip pin. How do the milled ones retain the pin? Is the rolled metal softer and the pin presses into it? Is there some type of spring thing going on?

author: alank2
author_rank: Super Contributor
timestamp: February 15, 2018, 03:09:06 am
content: Like this:

author: Unknown
author_rank: Unknown
timestamp: February 15, 2018, 09:02:18 am
content: if you look at theMill-max catalogue, they have aContact Infosection with descriptions & drawings of each type.

author: Benta
author_rank: Super Contributor
timestamp: February 15, 2018, 09:42:03 am
content: Go here:http://www.precidip.com/en/Products/Contacts.htmlIf you choose "Socket Contacts" you'll find drawings of the pins.

author: alank2
author_rank: Super Contributor
timestamp: February 15, 2018, 01:11:02 pm
content: Thanks guys; I see the fingers and how they work from the diagrams!
Millimeter waveguides with rounded inside? - Page 1
Forum section: electronics / projects

author: Plasmateur
author_rank: Regular Contributor
timestamp: August 07, 2019, 06:45:17 pm
content: I'm looking to purchase a coax to waveguide adapter and noticed some of the adapters have rounded insidesfound here:https://www.sagemillimeter.com/wr-42-waveguide-to-k-f-coax-adapter-right-angle/while other have the square inside that I'm used tofound here:https://www.sagemillimeter.com/wr-28-waveguide-to-k-f-connector-adapter-right-angle-thermal-vacuum-safe/Does anyone know what the major difference is between these two?

author: ogden
author_rank: Super Contributor
timestamp: August 07, 2019, 07:23:13 pm
content: Quote from: Plasmateur on August 07, 2019, 06:45:17 pmFlex waveguides are not strictly rectangular, yet usually their adapters are. To minimize loss or cut the costs, some flex waveguide may omit stepped transition and have adapter shape that matches waveguide - oval. You do not want adapter shape mismatch without proper transition because it will lead to some (minimal) loss. So - avoid rounded/oval adapters because they are rare
mimirOpen: Env IoT sensor for Plants - Page 1
Forum section: electronics / projects

author: lloydrichards
author_rank: Newbie
timestamp: September 19, 2020, 11:10:17 am
content: Greetings!Over the last couple of years, I've been developing a project for using machine learning to recommend house plants based on environmental data. This project has many parts, but one of the main components was developing a standardized sensor for collecting and sending data to our servers. Starting out two years ago with microcontrollers and a breadboard, the design and realization of this have come quite far with the current version being a fully integrated PCB with temp, hum, light, and air sensors built around an ESP32 WROOM 32D. I am in no way an expert in electronics (in fact, I'm professionally a garden designer) so much of what I've learnt has been a result of the Open Hardware community. Thus, it was important to me to release everything I've learnt on the hardware and software side back with OSH.https://github.com/lloydrichards/mimirOpenWhile the current version is a minimally viable prototype (MVP) for the greater project, it is at a point where my limited expertise is being outcompeted with the minutia of optimization and professional best practices. I am therefore at the point where I would love some help with the hardware/software side of things. Above is a link to the GitHub repo for the project which has the core of the code that I'm working on day in and day out as I improve the current version while also developing the UI for the frontend.If anyone is looking for a new OSH project to develop or is maybe interested in using ML and horticulture, or maybe just needs an environmental sensor for themselves and would like a kickstart, then I would love to hear from you. I'm also hoping that by putting this project out there, then I'll get questions and pushback that will help me to fill out the repo a bit. As most of this is just by myself, I've not needed to produce much in the way of documentation, therefore if you have any questions or comments please throw them up and I'll do my best to clarify.Thanks and look forward to working on this more!
minature transformer HPR-3022 Hypec C703 data sheet request - Page 1
Forum section: electronics / projects

author: Potential Resistor
author_rank: Contributor
timestamp: May 03, 2022, 06:42:09 pm
content: Hi, does anyone happen to have a datasheet for this transformer?HPR-3022 Hypec C703It has 6 pins (0.5 ohm across 2 pins), (120 ohms across 2 pins), and (120 ohms across 2 pins).I've done extensive searches on the internet and have been unable to find anything about the transformer.Thanks.
Minecraft/videogame mod for laying out schematics ? - Page 1
Forum section: electronics / projects

author: lordvader88
author_rank: Frequent Contributor
timestamp: April 27, 2018, 03:41:24 pm
content: I don't play MC or do graphics, but mapping out a PSU I wish I had it on my computer like in a game (At least I have jpeg's of the PCB to mark up.), that would look really cool. And if it was combined with simulation software it could work. You could animate a lot of the data like changing V/I, electric, magnetic fields.I have seen some videos of MC with electronics but not up to what I'm thinking.I'm just choosing MC since u could lay it out like lego. If I knew skyrim modding, I'd use that engine so it would look really cool.

author: german77
author_rank: Regular Contributor
timestamp: April 27, 2018, 05:26:12 pm
content: Although it will be really cool. Creating a mod like that will be a very bad idea. Ignoring the time and effort it will take to program this mod, you will need even more processing power just to simulate the circuit that's why minecraft only uses on/off logic the same applies to Skyrim.To give you an idea, to run circuits simulators I usually have to run them 100 slower than real time. Just for my computer to keep up with a decent refresh rate. With complex circuits it just becomes worse, and this doesn't ever consider magnetic fields.I'm not against your idea but you will be very limited in what you can do.
Minelab GPZ-7000 repair - Page 1
Forum section: electronics / projects

author: bklein
author_rank: Contributor
timestamp: April 21, 2022, 10:23:18 pm
content: Anyone have any experience with a GPZ-7000 repair? I have one with a damaged front end - most likely due to a botched X-Coil adapter. The original owner didn't want to spend $4600+ on a repair so I ended up with it. Could be a rather common fault so wondering if anyone knows what might be the issue. I have yet to open it up and start checking things. I will need to purchase a coil as I didn't get it with one.
Mini-breadboard fails as relay socket - Page 1
Forum section: electronics / projects

author: calzap
author_rank: Frequent Contributor
timestamp: January 09, 2021, 09:04:51 pm
content: Was building a relay-based current step-up module for a float switch that is part of a pump controller. The float switch is a Cynergy3 RSF124, which is a miniature float switch. It’s installed in a sidearm of the horizontal section of the pump intake pipe. Its purpose is to prevent the pump from operating unless there is water in the intake pipe. However, its current rating is less than that of the pump contactor coil, so a current step-up relay is needed.The relay is an Omron G2R-2 DPDT with a 9 VDC coil. There is plenty of 9 VDC available because it’s in use for indicator lamps, buzzers, timers, and other uses in the pump house. The relay is designed for through-hole installation on PCBs or perf-boards. Its pins are blade-like with sharp points. They looked small enough to fit in breadboard holes; so, I thought I would use a mini-breadboard as a permanent socket. This would be quicker than soldering and would allow easy replacement if necessary. The pins did slide easily into the holes. The module was assembled, and it didn’t work properly. If I wiggled the relay and held it at a specific angle, then it worked … sometimes.Apparently, the little dagger pins trashed some of the contacts in the breadboard holes. Or the pins shaved some bits of plastic from the walls of the holes, and the bits acted as insulators. The relay was then mounted on perf-board, and the leads soldered to the pins. Works perfectly … lesson learned.Mike in California
Mini Din adventure ..  - Page 1
Forum section: electronics / projects

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 13, 2010, 07:45:11 pm
content: I had planed to extent the TTL flash cable for my Olympus camera - external flash.And I like to share my odyssey , yes I had one ..First of all I got several male Mini Din , with wrong in diameter center plastic pin,some one had flood the market with damn cheap bad made, male ones.As soon I found one good set of three males , I was able to move on..At the process of soldering , I killed the first male Mini Din , due high temperature at the soldering station.No one ever advices , how much temperature to use ,when you work with those small and sensitive plugs !!The best tip that I have to offer , are to have the male & female hooked together, when you solder the cables on it.About how to correctly lock the small metal clip on the cable ( anchor ) ,its best to install the metal clip in the hole of the plastic inner body first, then to put above the cable with the soldered plug , and to use an common plier, and press the plastic bottom with its end of the metal clip.It gets a nice curved shape that way.Pictures ..

author: Kiriakos-GR
author_rank: Super Contributor
timestamp: May 13, 2010, 07:46:10 pm
content: Part No2
Mini DIN connectors confusion - Page 1
Forum section: electronics / projects

author: ricko_uk
author_rank: Super Contributor
timestamp: May 17, 2020, 08:00:48 pm
content: Hi,I am planning to use Mini-DIN PCB-mount connectors and thought there was only 1 type (for the same given number of pins) but maybe that's not correct?Three questions:1) With reference to the attached pictures, in one picture the "notch/index" is made from the shielding metal being notched/bent inwards. In the other picture (circled in red) it looks like there is a separate plastic pin. Generally it wouldn't matter but it looks like the one with the plastic pin is much further inward towards the centre of the connector's circle. The two pictures show two different numbers of pins but only because of the pictures I had handy. The same is for the same number of pins. So am wondering whether they are the same or not AND, if not, whether they are fully compatible with each other?BTW, The one with is sold as S-video cable and the other as general use and CD players use.2) Which are the most common/standard number of pin?3) what is the difference between Mini-DIN and Mini-XLR? Which is the most common?Many thanks

author: themadhippy
author_rank: Super Contributor
timestamp: May 17, 2020, 08:28:13 pm
content: Quotemini xlr have a locking mechanism,as for most popular,id say theres more Svideo connectors out there than mini xlr's,but the xlr ,in my opinion,is more robust and a much better connector.

author: jfiresto
author_rank: Frequent Contributor
timestamp: May 18, 2020, 10:41:58 am
content: I also favor mini XLR's. REAN rates theirs for 5000+ mate/unmate cycles.

author: ricko_uk
author_rank: Super Contributor
timestamp: May 18, 2020, 10:34:46 pm
content: Thank you,Any suggestions/answers for points 1 and 2 of my original post?Many thanks

author: coppercone2
author_rank: Super Contributor
timestamp: May 19, 2020, 12:36:52 am
content: only one type of connector
Mini drill speed control with stable RPM - Page 1
Forum section: electronics / projects

author: pvit
author_rank: Contributor
timestamp: July 10, 2019, 12:31:45 am
content: This speed control tracks AC brushed motor's RPM via BackEMF and significantly improves tool usability, especially at slow speed.Hardware should be universal, but PCB was routed only for Hilda 180W and others in the same case. It replaces original board, has self-calibration and does not require manual tune.Links:Github- docs & firmwareEasyEDA- schematic/PCB/BOM, everything can be ordered in couple of clicksThis project was done "just for fun", to learn how to make modern electronics easy-to-do for hobbists. We also documented all maths, raw logs and algorithm pitfallshere. May be that can save some time to one who decide develop something similar.Enjoy!PS. Not tested with 110V models, sorry.

author: pvit
author_rank: Contributor
timestamp: August 13, 2021, 12:28:55 pm
content: New version of software & hardware:Support new grinder models (Hilda 180 is out of marked).Single side SMD mounting (more easy to assemble).Replaced PID with ADRC.Improved calibration.

author: Renate
author_rank: Super Contributor
timestamp: August 13, 2021, 06:10:08 pm
content: In the US, Dremel brand (despite not being demonstrably better than the other crap) rules.The low "numbers" on the "speed" control are practically useless since they have no torque.I guess that I'll have to take mine apart and see if there is any space for a (reformulated) PCB.

author: pvit
author_rank: Contributor
timestamp: August 14, 2021, 08:55:10 pm
content: AFAIK, original dremel 4000 series already has "constant electronics" feature. And dremel 3000 series has not enougth room for PCB reroute.

author: Benta
author_rank: Super Contributor
timestamp: August 14, 2021, 09:07:53 pm
content: A universal motor does not generate useable back EMF for this kind of thing. I find this highly questionable.Measuring current consumption of the motor and increasing voltage when it rises might work, but would probably have stability problems. Works great with PMDC motors, though.

author: pvit
author_rank: Contributor
timestamp: August 14, 2021, 09:24:34 pm
content: Quote from: Benta on August 14, 2021, 09:07:53 pmhttps://github.com/speedcontrols/ac_sc_grinder/blob/master/doc/math.mdI'd suggest to read doc about math first. It contains details about our implementation, and references to alternatives.
Mini gate driver for consumer devices - Page 1
Forum section: electronics / projects

author: blueskull
author_rank: Unknown
timestamp: January 06, 2019, 07:07:55 pm
content: For many times, I felt the need of a tiny gate driver for small WLCSP packaged MOSFETs in portable, embedded designs. To date, the smallest half bridge gate driver is LMG1205, which measures 2mm*2mm.I'm thinking if we can have something smaller than that for, let's say, maximum 25V bus voltage (should be plenty enough for up to laptop 19V applications).I'm in the mood of rolling one with OnSemi I3T25 process, piggyback it in an MPW run, then pursue medium batch runs.My questions is, how many of you guys feel the need of such a device? Will I be able to recoup my 3000 Euro MPW cost from selling such a chip?Another option is to use SiLego parts with off-chip differential capacitive isolation barriers. This will have lower NRE, ~$1000 for their MOQ 3000 pcs order, or ~$1500 for 9k qty.I'm aware that they do offer blank parts in small qty, but practically it would be infeasible to program each chip in production, so factory programming is a must, hence the 3k MOQ.Again, will the need be enough if I sell such a design I can recoup my NRE?
Mini High Voltage Supply for Tube based Modular Synth - Page 1
Forum section: electronics / projects

author: proschuno
author_rank: Contributor
timestamp: April 05, 2014, 01:31:39 am
content: So I'm trying to build a small module for a future planned modular synthesizer that will use tubes. I'm trying to design a basic small switching supply that can make about 100V at about 10ma, which will be regulated using two 51V zeners. This could use a 555 timer in a boosting configuration of some sort, and I plan on powering it from 12V. I could also use 15V, but basically I just need to take 12-15V DC and step it up to 100V at 10mA with a simple circuit. To be quite honest I don't really know where to start, there's to many options on this one. I'm trying to build this:http://www.schmitzbits.de/vtvco2.htmlA one or two chip solution will also work really fine too...
mini pcie 1.5V - Page 1
Forum section: electronics / projects

author: x1215
author_rank: Newbie
timestamp: November 05, 2017, 01:31:12 am
content: For most devices I know, for example wifi module and 3G module, only 3.3V is required.I am curious what is the purpose of 1.5V? and determine whether I can remove 1.5V regulator or not.

author: ivan747
author_rank: Super Contributor
timestamp: November 05, 2017, 02:08:56 am
content: It's probably part of the standard. If you're only going to use it with a particular card, I guess it doesn't matter.Edit: this is the Mini PCIe standard:http://fit-pc.com/download/facet-cards/documents/PCI_Express_miniCard_Electromechanical_specs_rev1.2.pdf

author: x1215
author_rank: Newbie
timestamp: November 05, 2017, 02:18:51 am
content: Quote from: ivan747 on November 05, 2017, 02:08:56 amI know it is the standard, just curious what device need sink 1.5V. Thank you.? Tapatalk ? F8132 ??

author: photon
author_rank: Frequent Contributor
timestamp: November 05, 2017, 06:40:35 am
content: While the IO rail for the single ended IOs is 3.3v, the IO rail for the differential pair IOs is 1.5v. I guess it's there to save you a PLL.
Mini-Project: Bike Dynamo - Page 1
Forum section: electronics / projects

author: cprobertson1
author_rank: Frequent Contributor
timestamp: August 06, 2018, 09:25:39 am
content: I was bored at the weekend, and decided to make a (mechanically) resistive load for my trail bike - so I made a little A-frame that lifts the rear wheel off the ground, and loaded the wheel with knurled bit of PVC pipe - I'll rubberise it in the near future - which is connected to afire riskfelt pad for resistance. I'll replace it with somethingthat is less likely to ignitethat will wear down slower and not generate as much heat.So, I've turned my regular bike into a poor man's exercise bike - excellent.About five minutes ago I thought to myself: "Hey! Why don't you replace the resistive (mechanical) load with a dynamo and hook it up to a battery!"I liked this idea so much that I'm going to do exactly that! But, I lack a dynamo: time to improvise!Am I correct in thinking that I can just hook the spindle from a DC (or I guess AC) motor up to it and use that to generate some power?Obviously, the power I get out of it will depend upon the rate that I turn it, the size of the motor, the number of windings etc etc - I take it I will have to restrict that power to whatever the motor was originally rated for (i.e if it's a 12V, 1A motor, can I apply rotation up to the point that it generates 12W?)Finally, to charge up, say, a sealed lead-acid battery - take it I just need to regulate the voltage down to where I want and rectify it if required?

author: Zucca
author_rank: Unknown
timestamp: August 06, 2018, 10:54:18 am
content: Put the R in a water bucket to save energy when you need to cook pasta.Rember bullpark about 2KW are professional legs (tour de france), PEAK!Generally you want do deal with <<250 W normal training pace.How much W generates your legs?240W on 12 V battery are 20A, a little bit steep in my eyes.An old washer motor could do the trick...Also a USB charger could be handy if you want to run a tablet withhttps://zwift.com/

author: cprobertson1
author_rank: Frequent Contributor
timestamp: August 06, 2018, 11:43:12 am
content: Good question! I haven't calculated my energy output I'm afraid - though there is about a 1:20 reduction between the dynamo and the tyre - i.e for every rotation of the wheel, the load-axle will do ~20 rotations - but torque will be limited due to the small axle. I can add in a belt/pulley and a second wheel for the dynamo though to reduce that ratio to where I can drive a dynamo!Good shout with a washing machine motor - I'll visit the dump at the weekend and see if I can scrounge anything useful!

author: NiHaoMike
author_rank: Super Contributor
timestamp: August 06, 2018, 12:25:14 pm
content: Try an ECM motor without the drive for a commonly available high voltage alternator.
Mini project: Grid-Eye 8x8 infrared sensor + OLED = Mini IR cam - Page 1
Forum section: electronics / projects

author: 0xdeadbeef
author_rank: Super Contributor
timestamp: October 04, 2017, 11:38:02 am
content: Another little spare time project of mine.Quite some time ago I stumbled over the Panasonic "Grid-Eye" AMG88 family of infrared sensor arrays.They only have 8x8 pixels, but in comparison to Flir Lepton sensors, they are relatively cheap (~25€ including VAT) and easy to get (RS).So I ordered one some weeks ago, created a small breakout board and while I was at it, used the opportunity to create a mini IR cam by adding a cheap chinese "65k" OLED module (~6€).Since I was playing around with the LPC824 for another project, I used it as a chance to test (and bugfix) my SPI library.The LPC824 (32k ROM, 8k RAM) is running from a (trimmed) internal RC oscillator at 12MHz. Communication with the AMG88 is I2C and pretty straight forward.The temperature data is 12bit signed and the maximum frame frequency is 10Hz (actually there is only a 1Hz and 10Hz mode).So the LPC824 collects the data every 100ms, converts it to an IR false color palette, scales it up to 64x64 pixels and sends it with a four line SPI (CLK, MOSI, CS, C/D) to the OLED (96x64 pixels).Luckily I could use the HW SPI CS feature of the LPC824 in combination with DMA, so even though the data needs to be sent in 8bit frames (one CS per 8bit), I can send one full scaled up line (64x8 16bit pixels) with one DMA transfer.The whole setup needs ~60mA.

author: Back2Volts
author_rank: Unknown
timestamp: October 05, 2017, 12:29:16 pm
content: Very cool project !

author: 0xdeadbeef
author_rank: Super Contributor
timestamp: October 05, 2017, 04:46:23 pm
content: Thanks! Actually it makes me smile as soon as I plug it in (even though I own a Flir E4).If I hadn't so many other unfinished projects, I would sure be a funny gadget to put in a little case.I guess this kind of sensor could also be used for some kind of desktop toy, i.e. to track a face or hand and use it to control some eye or head movements.
Mini thermal camera core - Sofradir atom80 - Page 1
Forum section: electronics / projects

author: liteon
author_rank: Newbie
timestamp: April 15, 2014, 02:13:04 pm
content: Hey guys,What kind of thermal camera is this with just a single board? Any insights? Mike, THE E4 tearer?It uses Ulis Micro80p sensor..What is that connecter for? Maybe, there are more boards, and this is just a sensor board, but why is that connecter on the sensor board?-Liteon

author: Marco
author_rank: Super Contributor
timestamp: April 15, 2014, 02:51:34 pm
content: It's an integrated module with USB 2.0, just needs a lens and housing ... that said, that's pretty obvious.If you're doing stealth advertising could you tell us something interesting like a price? :p

author: liteon
author_rank: Newbie
timestamp: April 15, 2014, 03:10:35 pm
content: No. Not doing any ad.Just a newbie and trying to understand why would someone put an FPGA just below/so close to the sensor if you say its a module already, assuming it has an FPGA.

author: cyr
author_rank: Frequent Contributor
timestamp: April 15, 2014, 03:16:50 pm
content: Well, why not?If you are optimizing for cost and small size, having everything on one tiny board is an obvious advantage.

author: amyk
author_rank: Super Contributor
timestamp: April 15, 2014, 08:03:18 pm
content: USB? This is just a little closer to the idea of cheap thermal webcams becoming available...

author: scientist
author_rank: Frequent Contributor
timestamp: April 19, 2014, 07:27:17 am
content: That USB is probably just for FPGA programming, not data transfer.

author: daedalus
author_rank: Regular Contributor
timestamp: April 19, 2014, 06:33:38 pm
content: the usb is for getting image data, but its only an 80x80 sensor, so not a lot of data to transfer

author: firewalker
author_rank: Super Contributor
timestamp: April 19, 2014, 06:45:21 pm
content: Mu Optics?Alexander.

author: daedalus
author_rank: Regular Contributor
timestamp: April 19, 2014, 07:59:48 pm
content: in case anyones interested, theres a datasheet herehttp://www.ircores.com/landing_atom80.html

author: scientist
author_rank: Frequent Contributor
timestamp: April 21, 2014, 06:03:57 am
content: For $150 I'd buy it...
MINI TS100 Digital OLED Soldering Iron Station  42.22 USD promotion - Page 1
Forum section: electronics / projects

author: ebclr
author_rank: Super Contributor
timestamp: November 11, 2017, 11:41:45 am
content: https://www.banggood.com/TS100-Digital-LCD-Programable-Interface-DC-5525-Soldering-Iron-Station-Built-in-STM32-Chip-p-984214.html?utmid=2340&cur_warehouse=CN

author: Rbastler
author_rank: Frequent Contributor
timestamp: November 11, 2017, 11:47:32 am
content: Unfortunately the tips and the casings aren't reduced in price
Mini USB Host Board Arduino Compatible - Page 1
Forum section: electronics / projects

author: craftycoder
author_rank: Contributor
timestamp: September 05, 2012, 06:57:20 pm
content: Hey guys, first time poster, long time lurker. I just posted up my first Kickstarter project and it seems like this is a good place to share it. What you think?http://www.kickstarter.com/projects/985890579/mini-usb-host-microcontroller-board-arduino-compat

author: westfw
author_rank: Super Contributor
timestamp: September 06, 2012, 05:04:15 am
content: Isn't a m328 cpu likely to be rather short on code space when it comes to talking "USB Host" to popular devices? I thought that's why the existing ADK devices were all based on the MEGA (atmega2560)

author: craftycoder
author_rank: Contributor
timestamp: September 06, 2012, 03:20:47 pm
content: That is always a concern when choosing a MCU. If you watched the video, you would have seen a large variety of projects that all work with the available space. In practice, I've yet to run into the issue. I've gotten a few KB from the limit but never reached it. The aim here is for a small and inexpensive enough board that you can leave it in projects without the bitter taste of $80 down the tubes. I can add a BGA 2560 in the same footprint but the cost goes up and it becomes a little awkward to program with the basic Arduino interface because the pin outs are not the same.When making a project of this type you always have to make judgement calls. I am aiming at cost, size, and simplicity which brought me here.
Mini2440 friendlyarm : TFT queries - Page 1
Forum section: electronics / projects

author: embedded.world@aol.com
author_rank: Contributor
timestamp: March 22, 2014, 02:20:19 pm
content: I have got project from china which uses mini2440 friendly armhttp://www.friendlyarm.net/products/mini2440It do some specific tasks & works fine. I don;t have access to internal code.1. After sometime touchscreen TFT misbehaves. I press at some point & it responds at other. Basically it needs calibration. Chinese vendor added password to tft calibration setting. I asked him but he further buys it from somewhere else & couldn't respond.Can I calibrate TFT without affecting the main code inside it.2. Can I add equivalent TFT with large size without affecting code & display.Reply With Quote
Miniature optical limit switches - Page 1
Forum section: electronics / projects

author: Zbig
author_rank: Frequent Contributor
timestamp: December 05, 2022, 10:26:24 pm
content: During the disassembly of various gear (like laser printers, etc.) I learned of the existence of an element that I'm pretty sure is a transmissive (slot) optocoupler with a tiny integrated, spring loaded lever that interrupts the light path. The whole thing just a five or so millimeters across. Imagine something like a classic tact switch but with a tiny plastic "tooth" poking from its side instead of a button on the top. The "tooth"/lever physical resistance is very light, smooth with no discernible actuation point which makes me think those are actually optical.The thing is, I want something like that for my project but have had no luck finding anything like that. Does anybody know how to search for such a thing?

author: jwet
author_rank: Frequent Contributor
timestamp: December 06, 2022, 12:53:04 am
content: I've never seen an off the shelf one and I've seen a lot of opto type gear. The usual solution is to use an optical slot device and make the flag/gate piece yourself. This is a lot easier with 3 d printing. Make a cam/flag gadget armature, use some small drill rod or a small shaft, make a yoke (c-shape) with your 3d printer and you're done. Take care that your plastic flag material is opaque to IR light, some plastics look almost back but IR will go right trough them.

author: tooki
author_rank: Super Contributor
timestamp: December 06, 2022, 02:39:27 am
content: Quote from: Zbig on December 05, 2022, 10:26:24 pmNope, not optical. Just really light springs. They’re sold as limit switches or “detector” switches. For example, TE Alcoswitch JJ series, or Omron D3S* series.Here’s some on Digi-Key:https://www.digikey.ch/short/qr94bdf0

author: Zbig
author_rank: Frequent Contributor
timestamp: December 06, 2022, 10:34:31 am
content: Thanks guys, that would make sense. Would be trivial to figure this out myself if only I had one on hand instead of just having seen few of those in passing. Actually, 3D printing the "interruptor" part was my original idea but then I figured why deal with small details and tight-ish tolerances if there's something ready-made available. Now, that I'm back to it being my only option, this is totally fine. Thanks again!Cheers,Zbig

author: Psi
author_rank: Super Contributor
timestamp: December 06, 2022, 10:59:48 am
content: FYI, TACLEX make cheaper detect switches that are often pin compatible with Panasonic/omron versionshttp://www.taclex.com/en/Product-3-15.htmlYou can usually find them on aliexpress if you search for a taclex part number.
Miniature project box ideas? - Page 1
Forum section: electronics / projects

author: kalel
author_rank: Frequent Contributor
timestamp: September 09, 2017, 09:38:52 am
content: I have some really small project boxes, actually junction boxes.Dimensions are 40*20*11mm, I have 5, and it was less than $1.I'm curious, is there any potential use for these other than a junction?I am also interested mostly in very simple projects, as I don't have many parts (even not any opamps or mosfets yet - they can cost a bit).And especially important in such a size restricted case, I also don't have SMD parts.Just out the top of my mind:- A miniature 1 LED USB flashlight.Or battery powered, but the battery must be really small (e.g. watch battery). I doubt a cr2032 can fit in there. I'm also not sure that lipo's this tiny are available (plus there wouldn't be space for a charge controller). But it wouldn't be powerful in any case, not much space for a larger LED with a heatsink.- Maybe as a sort of side light shield for a sensor, to make it more directional. But I can't think of a particular one at this time.Of course, I would like some more ideas if you have any, especially as those above aren't that great.
MiniDSP 2x4 HD-Drawing a Functional block diagram-Help please. - Page 1
Forum section: electronics / projects

author: djsb
author_rank: Super Contributor
timestamp: November 22, 2024, 09:17:03 am
content: I have broken MiniDSP 2x4 HD active crossover. As I can't use it, I would like to learn more about how it works as a system. The first step is to create a system block diagram. Here is a list of the main chips that are used (in no particular order)1/ ADSP-214892/ XMOS XEF216-512-TQ128-C20A (marked E01692C20)3/ AK4626AVQ (codec-ADC/DAC)4/ TPS65261-15/ 45DB321F6/ CD40106BM (Hex inverting schmitt trigger)7/ NJM2068 (audio op amps on the 2 inputs and 4 outputs.There are a few other various diodes and transistors etc scattered around. I'd just like to understand a bit about how the main chips fit together to make the overall system. Can someone help me to understand this? Are there any resources apart from the datasheets (which I will add the links to over the weekend)? Thanks.

author: Boscoe
author_rank: Frequent Contributor
timestamp: November 22, 2024, 10:17:09 am
content: Datasheets are the way, really. You could say a large part of a design is the engineers inspiration etc. but but will be 90% informed by the datasheets and thus the capabilities of the devices themselves. You could likely reverse engineer a lot of the design this way. Bear in mind there are programmable devices here.
MiniGen - Output Circuitry  - Page 1
Forum section: electronics / projects

author: aw_rw1
author_rank: Contributor
timestamp: January 05, 2023, 10:05:09 pm
content: For some reason, the output of the MiniGen, set to 11.9Hz, is giving an offset of 1.5VDC and a 1.1Vpp. From the circuit diagram, the DC offset looks like it's coming from a voltage divider R9 and R10. The opamp configuration looks like a voltage follower. So the 1.1Vpp is coming from the signal generator AD9837. Am I correct?Another curiosity, when I draw current from the output, I only see DC current, no AC current. Is this because the opamp? I measured AC current on an AC source with on problems. I am using a 34401A bench meter to measure current.Attached is the schematic for the MiniGen.

author: wasedadoc
author_rank: Super Contributor
timestamp: January 05, 2023, 10:56:40 pm
content: Of course the output will be AC with a DC offset of approx 1.65 Volts.
Minimal connections to drive T6963 LCD module - Page 1
Forum section: electronics / projects

author: CambridgeMart
author_rank: Regular Contributor
timestamp: August 03, 2020, 07:01:55 pm
content: I'm working on a project that has a single channel 12bit ADC and a display module; the cheapest way to get a 12 bit ADC and microcontroller appears to be the Arduino M0; I've found some reasonably priced variants with the STM32F003F4 microcontroller, but there appears to be only 13 IO lines. I have a nice T6963 module that I want to use, but the data indicates that 13 control / data lines are required, which I don't have. In such a minimal circuit, can lines such as CS and /RD be tied to a fixed voltage?

author: ebclr
author_rank: Super Contributor
timestamp: August 03, 2020, 09:32:14 pm
content: You can easily add more i/o lineshttps://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf

author: coromonadalix
author_rank: Super Contributor
timestamp: August 03, 2020, 11:14:56 pm
content: You can go down to 7 pins, i think with some shift registershttps://github.com/Orabig/Rasp-T6963C

author: CambridgeMart
author_rank: Regular Contributor
timestamp: August 07, 2020, 01:07:50 pm
content: Thanks coromonadalix, that's really useful.

author: Scrts
author_rank: Frequent Contributor
timestamp: August 07, 2020, 02:00:00 pm
content: Quote from: CambridgeMart on August 03, 2020, 07:01:55 pmI understand that you've made a mistype and had STM32F030F4 in your mind? TSSOP20 package? In that case, based onSTM32F030F4 datasheetpage 10 Table 2, you can have 15 GPIOs. And indeed, if you look into page 27, you can count 15 GPIOs, however the only limitation is that you will have to utilize internal oscillator in order to free up 2 GPIOs PF0/PF1 that are otherwise dedicated to the external XTAL.

author: CambridgeMart
author_rank: Regular Contributor
timestamp: August 08, 2020, 12:41:27 pm
content: Yes, it's the STM32F030F4 in a TSSOP20 package; the XTAL is on the board so the PF1 and PF2 lines aren't available.It's academic now, I found the code wouldn't compile to fit in the 16K of flash available even using the maximum amount of code size optimisation.

author: Scrts
author_rank: Frequent Contributor
timestamp: August 08, 2020, 08:23:49 pm
content: Quote from: CambridgeMart on August 08, 2020, 12:41:27 pmWell... You can always remove it
Minimal Keypad enclosure - Page 1
Forum section: electronics / projects

author: @rt
author_rank: Super Contributor
timestamp: May 02, 2016, 12:45:56 pm
content: Hi GuysI was hoping for some ideas, and maybe someone else had encountered similar.A 12 key numeric keypad from RS needs an enclosure with a battery compartment and slide cover, but no screen cutout.I could have a piece of acrylic laser cut including holes to make a flat panel for the keypad to suit any enclosure.It’s for a hobby project, but some investment has gone in and I don’t want that handheld case from Jaycar which would be ideal!RS seems to only have generic handheld enclosure with LCD cutout that could be covered, but the face of the enclosure is curved.I don’t want the case a great deal bigger than a numeric alarm style keypad and it’s batteries. The PCB fits behind the keypad.Is there something out there for one off units someone has used?Cheers, Art.
Minimal wiring relay contacts. - Page 1
Forum section: electronics / projects

author: ornea
author_rank: Unknown
timestamp: May 16, 2019, 11:26:25 am
content: I often use relay shields or completed boards that may be populated with relays.They typically break out the NO, NC & COM via a 3 pin screw terminal.Often I simply want to switch the same supply (12VDC) that is feeding the board. To wire this via screw terminal gets messy and I always find I need somewhere to connect thecommonground.I have taken to soldering bodge wires as shown in the diagram attached which appears to an elegant solution. But curious if it is bad. I can see it is bad for some unsuspecting person who comes after me but if its just me I think it fine.The bodge wires provide, Normally ON(2-3), Normally OFF (2-1) and Always ON (1-3) terminals. It is clean, tidy and allows me to easily install the boards and connect the relay driven loads.I am about to incorporate this in my own PCB design with clearly labelled pinouts.I think it is a good solution but feel there is something I am missing as to why this is bad.

author: ataradov
author_rank: Super Contributor
timestamp: May 16, 2019, 05:53:12 pm
content: If NO, NC and COM labels are nowhere close to the connector, then I think you are fine. Anyone who has hooked up a lot of relay units like this will be looking for those labels, and not having them will give enough of a pause.
Minimalist Thermal Controlled Power Gating 1-2 Piece - Page 1
Forum section: electronics / projects

author: vectoronic
author_rank: Newbie
timestamp: March 16, 2024, 08:15:36 pm
content: Is there a Common SMD or thin strip type of component that is just Mosfet/Thermisistor Fuse that operates in line with a circuit at near 0 ohm and chokes voltage the hotter it gets in a much broader range then regular thermal fuses.Reliable enough for medical devices even where the parts being regulated don't need a thermostat or the thermal controlled component measured to operate. so 24V supplied open 0 ohm then 100f on component in line with element exponential Ohm increase scales to choke to near inf-OHM at 130f.The part must be designed already just has been difficult to find a name or thermistor with that low temp and low voltage spec and a wide operation range in the multi deca scale.Mosfet and fuses are known well but looking for a single self contained component 2 points of connect and "it works".so thermistor fuse but functions with very wide precision Gate/choke. If this isn't a thing i understand it could be designed in a small package as a multi in one component in shell easier then a scientific designed layered one.I'm assuming it would consist of a Alloy Junction or specialty mosfet stacked on a regular Thermal fusing component ideally PTC like in a 5mm-60mm package.

author: Someone
author_rank: Super Contributor
timestamp: March 16, 2024, 10:23:04 pm
content: 2 terminal DC device... so where does the mosfet get a drive voltage from?

author: vectoronic
author_rank: Newbie
timestamp: March 18, 2024, 03:44:00 am
content: as a packaged IC device would be Within the package sourced from input so positive would be powering a thermal package controlling the mosfet drive on the same chip or lithographed IC passive power consumption through driver circuit in parallel to mosfet and mosfet clamping 0hm-infohm.But this in my mind more of a bi-layer polymer based specialized Semi conductor sandwich Material wizard design. As simple as a film resistor on outside but yes functions like a 2 pole mosfet controlled by magic (resistance curve based on temp whether by liquid metal, materials, capacitive gap ect etc).

author: PCB.Wiz
author_rank: Super Contributor
timestamp: March 18, 2024, 04:27:42 am
content: Quote from: vectoronic on March 18, 2024, 03:44:00 amI've seen wax+spring based fuses that work like that"controlled by magic - resistance curve based on temp, whether by liquid metal, materials,"- but of course, they are one-way actions.
Minimising EMI from transformers, what orientation? - Page 1
Forum section: electronics / projects

author: Deactivated-1
author_rank: Frequent Contributor
timestamp: September 23, 2022, 09:40:13 pm
content: I can't figure out what would be the most ideal orientation to minimize transformer to transformer interference/coupling, and also most ideal orientation in relation to other circuit components to minimize interference.Interference with inductive components would be the same as with another transformer, but what about capacitive coupling?It would make sense that the least coupling would be on the core sides, instead of the open coil sides, but what if the transformer is shielded? although arguably in that case capacitive coupling would be practically 0...is there perhaps some illustration of the magnetic fields emitted on the outside of the transformer?

author: Kleinstein
author_rank: Super Contributor
timestamp: September 24, 2022, 06:22:43 am
content: Capacitive coupling can be shielded quite well. Magnetic shielding is possible, but a bit more tricky and more effort.There are some pictures around for the stray fields of transformers.For the magnetic coupling it helps of the tranformers are rotated relative to each other, so that there stray fields are about perpendicular to each other. Much of the stray field is relatively localized and additional distance can thus help quite a bit.

author: Gyro
author_rank: Super Contributor
timestamp: September 24, 2022, 08:58:07 am
content: Yes, it's normal practice to orient the mains transformer at 90' to the output transformers. A choke filtered supply is more tricky because of its gapped core, and greater (magnetic) hum field, this needs careful positioning with respect to signal and beam power tubes also.