hybridfree/eevblog-posts huggingface dataset:
Signal/pin ID on photocopier motor - Page 1
Forum section: electronics / projects

author: josecanuc
author_rank: Contributor
timestamp: September 14, 2023, 03:33:25 am
content: I have taken apart an old Xerox Workcentre 7556 copier/printer to extract various bits, including some of the paper path drive motors. These are almost definitely BLDC motors with integrated drivers. Almost all that I've come across from this copier and others have the signals labeled, but it is not clear to me what these pins are for, whether they are inputs or outputs, and if inputs -- what does the signal look like?Obvious pins:+24V (24V positive)24VRTN (24V negative/gnd)5V (5V positive)5VRTN (5V negative/gnd)START/STOP (turn motor on or off)BRAKE ON/OFF (turn braking/holding on or off)CW/CCW (Clockwise or Counter-clockwise direction)Unclear pins:FAIL OUT - Seems likely to be an output fault indicatorREF CLOCK - Is it an output indicating a tachometer-style speed indicator, or is it an input to synchronize the motor to the print engine? What is the waveform (square, sine, triangle?) Is it PWM or frequency adjusted?GAIN SEL - "SEL" indicates an input, to select a specific gain value. Is it a digital/binary signal (HIGH/LOW only)? Is it analog to control gain? What is being gained - Is it some internal measurement of the rotation, or of the REF CLOCK, perhaps?Other brands/versions have different pins, but they seem to be generally some variation on the above.I've found a datasheet on one of the driver chips for these, but have a hard time deciphering which pins are on the motor side and which are the external pin side.There are a few YT videos, but many of them have you remove the rotor or wire in a standard ESC, which seems a waste of a perfectly good controller. Or the videos show the motor running, but don't explain which pins get hooked up. Also in these videos, often there is obviously no external clock reference, so the motors are probably running in a non-controlled manner, unlike their intent of feeding paper through a copier at a stable or known or measured speed.Has anyone documented these kind of motors somewhere?
sigrok logic analyzers: PulseView (works) vs sigrok-cli (errors) - Page 1
Forum section: electronics / projects

author: mtek
author_rank: Newbie
timestamp: January 31, 2025, 09:33:00 pm
content: Hello! I have been running tests using various sigrok compatible logic analyzers for about two weeks. I am running both PulseView and sigrok-cli on a rasberry pi 5. PulseView has been running great and I can collect 5G samples @ 24MHz (the max for most of my logic analyzers). However if I try to collect with sigrok-cli (with the same settings) I often get the error "device only xxxxxx sent samples", ans sigrok-cli dumps back out to the command prompt.Should I be collecting samples using binary file output in sigrok-cli? I was hoping performance of sigrok-cli would be much better or at least the same as PulseView.
Sii9030 or  cat6612 pdf need  - Page 1
Forum section: electronics / projects

author: satanistik
author_rank: Contributor
timestamp: February 21, 2023, 09:20:03 am
content: I need more details about this ic, I found only 2 page but no pinout and no register description. Or similar ic can translate YCbCr digital to HDMI (yes Fpga but specialised ic look simple).Foe cat6612 is better pdf but nothing about registers.
SIL Header cost - Page 1
Forum section: electronics / projects

author: JVR
author_rank: Regular Contributor
timestamp: February 08, 2017, 09:45:49 am
content: Hi everyone, its been a while since I've posted.I have a question, does anyone have any ideas on a low cost replacement for TH SIL headers? I've always specced them with abandon, but now that I am manufacturing and looking at the cost, they are up there with the most expensive components on the PCB.
SIL pad connected to GND. - Page 1
Forum section: electronics / projects

author: boyddotee
author_rank: Contributor
timestamp: December 15, 2023, 11:09:52 am
content: Hi All,Hoping someone may be able to answer why, I'm currently working for a company that specialises in rail and road lighting. This particular device is a power supply for a HID headlamp.The question is why would the engineer that designed the board specify electrically connecting the SIL pad to ground when the SIL is not conductive (I've checked).In advance, I cannot unfortunately share the schematic for IP reasons.Thank in advance for any ideas.Chris.

author: boyddotee
author_rank: Contributor
timestamp: December 15, 2023, 11:17:04 am
content: Photo attached.

author: Phoenix
author_rank: Frequent Contributor
timestamp: December 15, 2023, 11:31:55 am
content: The pcb has scrn which could mean screen. Sometimes an electrically conductive screen is placed between a switching device and the heat sink. This is used to guide capacitively coupled currents to a friendly node instead of say earth where it can radiate out.In this specific scenario I can't see any screen unless it's built into the silpad.

author: boyddotee
author_rank: Contributor
timestamp: December 15, 2023, 11:46:57 am
content: Thanks Phoenix, the SIL pad in none conductive in this case which is why its puzzling.The SCRN although not easily visible could also refer to a guard trace that's under there, and ultimately runs along the transformers pins which on that side have no connection.

author: boyddotee
author_rank: Contributor
timestamp: December 15, 2023, 12:00:49 pm
content: Other side, I think with the distance there would be little to no coupling effect.The heatsink itself is not connected to GND.

author: Sacodepatatas
author_rank: Regular Contributor
timestamp: December 15, 2023, 12:17:38 pm
content: Quote from: boyddotee on December 15, 2023, 11:46:57 amIt is puzzling deliberately. It's an authenticity check. Do you know the issue that had Van Halen music band with brown colored M&Ms? That's the same sort of thing.Think of It: If you find a copycat device trying to pass as genuine, but they don't include such special feature because looks silly, that's an evidence of counterfeit. If a design from another brand is so suspiciously similar that also includes such a feature just because, then the original designer can alledge that their IP was stolen.It's like a watermark.

author: Conrad Hoffman
author_rank: Super Contributor
timestamp: December 15, 2023, 09:45:22 pm
content: Another possibility is that it ensures some other aspect of the assembly is done correctly or it provides some mechanical protection. Think outside the electronic function.

author: sleemanj
author_rank: Super Contributor
timestamp: December 15, 2023, 09:53:06 pm
content: Or it silences an unconnected component/pin error in the Schematic/PCB editor.
SIL Rating - Page 1
Forum section: electronics / projects

author: Throy
author_rank: Regular Contributor
timestamp: October 23, 2015, 05:31:30 am
content: Recently we've had a customer come back to us and say they would like to have a product rated to SIL 2, three years after the project has been finished. Now we've done the FMEA on the hardware and sent that information in to the company that is doing the rating.The thing that I'm still not too clear on is how do you determine if the software meets SIL 2? I've asked this question a couple times to the company but I'm not really getting any straight answers. I believe they haven't done too much with software in the past, mainly just hardware.

author: penfold
author_rank: Frequent Contributor
timestamp: October 23, 2015, 01:17:26 pm
content: Don't even go there! SIL is series stuff and not strictly something which an existing product can be turned towards.The SIL 2 rating has more implications towards the quality system which was used during its development, design review frequency, seniority of people involved and the relationship between testers and designers.Regarding SIL and IEC 61508, there are very few straight answers, I have never come across any text that will definitely say what you should or shouldn't do.Guidance for software is quite is quite helpful in the standard and gives a reasonable clue, as to what you should/shouldn't do.

author: Scrts
author_rank: Frequent Contributor
timestamp: October 23, 2015, 01:44:40 pm
content: We have some automotive projects having ASIL rating, but I am not sure how close this to industrial. The problem is that you have to follow certain development procedures, e.g. the V model and provide all the evidence that you've followed the procedures, used certain Functional Safety rated tools, compilers, etc. Document everything according to the standards, prepare Preliminary Hazard Analysis, prepare Technical Safety Concept and bunch of other paper stuff... If you will agree on this, you probably will have to re-do everything. We've had to drop one contractor company because they could not deliver ASIL level, but they still went to training which costed them more than a 100k€. If anything would happen during the lifetime of the product and audit would find out that you have not followed all the procedures, you will be sued and that will cost millions.I am working on ASIL-B rated project and at every step of decision making I have to ask myself: how will I defend in case of worst case in front of the court?
Silabs C8051F5xx IDE Users? - Page 1
Forum section: electronics / projects

author: digsys
author_rank: Unknown
timestamp: April 19, 2017, 03:08:45 am
content: This is a long shot, but worth a try. After 45+ yrs of coding, I'm afraid, the ol' memory is playing havoc (diabetes doesn't help either). I used to fly along with code.I've used these series MPUs for a long time (my favourites, as per previous post), but have been away from them for 4 yrs.Re-installed the Silabs IDE, and now confronted with all manner of weird errors ! The Silabs <> Keil IDS was always "buggy", and the licensing a mess, but it seems(?) it's worse now ?I've tried the SIlabs forum, but answers are slow and short, and aren't helping much. All the techs we had, are all gone, or not available.This is not a code rewrite, just need (paid) help working out the stupid errors and getting the IDE working properly. You'd need to be familiar with it though .. I'm open to suggestions.The ideal would be a "local" who is also after part-time work (other projects), or technology exchange. PS: It is all assembler. No C allowed :-)

author: ebclr
author_rank: Super Contributor
timestamp: April 22, 2017, 04:22:17 am
content: I'm using silabs Ide with F350 series and is flawless everything just works perfectly, all trouble I have was my fault system is reliable and stable My Setup is windows 10 64 GB I7 5960X

author: digsys
author_rank: Unknown
timestamp: April 22, 2017, 09:25:15 am
content: If I may ask - How long have you been using this series MPUs? What IDE setup do you have? Silabs IDE + Keil uVision? or the newer SimpleStudio etcDo you write in C / Assembler / mixed? Do you use many .INC files?I've used many of the MPUs for 10+ yrs, always had odd error messages, temperamental licensing issues, I just ignored them and they always worked.After 4yrs away, somethings changed. Maybe default setups? Not sure.

author: Cervisia
author_rank: Regular Contributor
timestamp: April 22, 2017, 09:46:56 am
content: This sounds as if you're trying to use an old project in a new IDE.Assuming that it isn't possible to dig up the old IDE, the most reliable way to get it to work is to start with a new, empty project, and to re-add all the source files.

author: ebclr
author_rank: Super Contributor
timestamp: April 22, 2017, 05:18:23 pm
content: I forgot to mention Simplicity Studio is version 4, But I was working with prior versions all works, 8 bit 8051 derivatives including efm8, the typical project have something like 20 to 30 files, all based on an empty project. The thing just works, and can even estimated power usage
[SOLVED] Silabs si446x not receiving any data - Page 1
Forum section: electronics / projects

author: sixtimesseven
author_rank: Frequent Contributor
timestamp: July 09, 2019, 04:30:23 pm
content: I'm trying to get two si4463 (E10-433MS) modules to work on the stm32f070. I get one module to send data and transmitt the package (or at least there something is transmitted since the module transmits at 434mhz) but I cannot receive anything on the other module.Both stm32 use the same Silabs WDS config file which is basically the default with fixed package lenght / no CRC at 434mhz.On the TX side:0. Init device / loading radio_config.h (generated by WDS)1. Clear TXRX FIFO2. Clear all interupts3. Send 21 Bytes to TX FIFO4. Transmitt FIFO5. Delay 200msOn the RX side0. Init device / loading radio_config.h (generated by WDS)1. Start RXa.) Change to ready stateb.) Clear Interuptsc.) Clear TXRX FIFOd.) Send Start_RX Command "START_RX, 0x01, 0x00, 0x00, 0x00, 0x00,0x03,0x00"2.) Check if RX FIFO has anything in it3.) If so, transmit message + Rx FIFO via uart4.) Restart loop at step 1I cannot see what step I would have missedThank you!Links:Project source :https://github.com/sixtemesseven/si446x/tree/master/si446xDocumentation on the si446x:https://github.com/sixtemesseven/si446x/tree/master/DocumentationWDS:https://www.silabs.com/products/development-tools/software/wireless-development-suiteEbyte E10-433MS module:http://www.ebyte.com/en/product-view-news.aspx?id=120UPDATE:It looks like the RX FIFO Buffer gets 7 bytes filled in (FIFO_INFO 0x15 returns 0x07 for RX FIFO count). However, the RX FIFO Read comand (0x77) will return only 0x00 instead of "abcdefg" in ascii hex.See LA screenshots...UPDATE IIOk, I did not send the correct TX_FIFO_WRITE command, so the TX fifo was empty and I correctly received 0x00 seven times. Should work now.

author: ayaznaqshband
author_rank: Newbie
timestamp: July 04, 2022, 07:13:17 am
content: Hello dear,Did it work?
Silabs SI5351 NVM - Page 1
Forum section: electronics / projects

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: January 27, 2017, 01:45:05 am
content: Anyone know what is Silab's min. qty. for getting a factory-programmed NVM part? Since they ask for a company name when you register, I assume that "one" is not possible.Apparently for the Si5351 the NVM can only be programmed at the factory, presumably because you need access to the die? There's no programming spec for the NVM, for me to program in my living room...Yes, I know I can use I2C on power up but I am curious and wondering if I can get the parts count down for this personal project.

author: KhronX
author_rank: Frequent Contributor
timestamp: January 27, 2017, 01:57:03 am
content: I'm no expert, but i'd say chances are good the minimum order quantity may well be in the thousandsBut i stand to be corrected...

author: jbb
author_rank: Super Contributor
timestamp: January 27, 2017, 03:26:12 am
content: Not sure about this particular chip, but Digikey used to offer custom programmed ones. You'd place a comment in your order and they would program the chips for you.
silent and well balanced 20x6.5mm blower - Page 1
Forum section: electronics / projects

author: daslolo
author_rank: Regular Contributor
timestamp: April 12, 2019, 07:41:19 am
content: These ev200d goggles have a very noisy cooling blower. The balance is bad, cheap stuff.I'd like to replace it with something quality that will not produce vibration and will be silent.the specs are 20mmx20mmx6.5mm 5V/0.1AAnyone has a recommendation?Thank you.
silent, sweep analog clock mechanism? - Page 1
Forum section: electronics / projects

author: JimRemington
author_rank: Regular Contributor
timestamp: December 06, 2020, 04:35:23 am
content: Has anyone taken apart one of the relatively new "silent, no-tick sweep" analog clocks to see how the motor works?On a related topic, I've long wondered how the ubiquitous tick-second single coil clock steppers manage to run unidirectionally, and recently ran across this nice video explaining the mechanism, as well as how to make it run backward.
Silicon analog tuners have no datasheets - Page 1
Forum section: electronics / projects

author: fabiodl
author_rank: Frequent Contributor
timestamp: July 29, 2014, 07:58:45 pm
content: I saw that nxp and silabs have very nice solutions for analog tuners, namely tda 8275 and si213733 but both of them provide only short versions of their datasheets.Without even knowing the i2c registers how are customers expected to proceed?

author: tinhead
author_rank: Super Contributor
timestamp: July 29, 2014, 08:51:25 pm
content: TDA8275 is known under linux, so you might read the driver sources to learn how to use it. Not that nice way, but much better than nothing. Silabs will provide datasheet once you ask them directly (you will have to use your business contact)

author: calmtron
author_rank: Regular Contributor
timestamp: July 29, 2014, 08:51:50 pm
content: You usually need to contact a distributor and sign an NDA before getting access to the full datasheet and support, which kinda sucks for hobbyists and/or small companies.

author: fabiodl
author_rank: Frequent Contributor
timestamp: July 30, 2014, 06:02:13 am
content: @tinhead thank you, I will surely look at the kernel drivers's sourcehere@calmtron thank you, that was what I expected. As I am just an hobbyist, and the volume of my production is 1 or 2 units. I believe I have no chance then.What will be the advantage for them of keeping even the i2c registers meaning closed?However, I just saw that they're not available neither at RS nor at chip1stop. Do you know hobbyist friendly alternatives?

author: Mr Simpleton
author_rank: Unknown
timestamp: July 30, 2014, 04:12:15 pm
content: "RTL-stick" seems popular these days, I'm sure there are tons of information out there regarding the tuner chip... And they complete stick did cost me like $1.50 on a recent sale....
silicon capacitors? - Page 1
Forum section: electronics / projects

author: SArepairman
author_rank: Frequent Contributor
timestamp: January 31, 2014, 07:21:12 am
content: what are the silicon capacitors that show up in digikey good for?http://www.mouser.com/Passive-Components/Capacitors/Silicon-Capacitors/_/N-5g95

author: DutchGert
author_rank: Frequent Contributor
timestamp: January 31, 2014, 08:47:16 am
content: First time I heard from them. According to Mouser Whitepaper it's high tem/high stability/high reliablility:http://www.mouser.com/pdfDocs/IPDiA_WhitePaper_HT_SiliconCapacitor.pdf

author: Psi
author_rank: Super Contributor
timestamp: January 31, 2014, 08:53:29 am
content: The descriptions pretty much sum it up.They're good for applications where they're subjected to really high temperatures. Where you need a cap that wont fail or drift out of spec over time at high temp.Other types of cap 'age' quite badly at high temp, even when its within their spec.Aerospace/military/medical are their intended application.There isn't many other places where you could justify paying $13 for a single 0402 cap.

author: BravoV
author_rank: Super Contributor
timestamp: January 31, 2014, 09:01:09 am
content: Quote from: Psi on January 31, 2014, 08:53:29 amWonder if I could somehow relabel the cap, do some easy video demonstration of heating up the cap + a LCR meter to show how good it is + some technical jargons to spice it up, and then sell it for $100 a pcs to audiophool community?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 31, 2014, 10:23:25 am
content: You probably could, except for one problem.... it contains silicon, and we all know SS is the work of the devil.Only vacuum capacitors are worthy of the GOT!**God of Triodes, for those of you not blessed by the three-in-glass.Tim

author: poorchava
author_rank: Super Contributor
timestamp: January 31, 2014, 11:40:18 am
content: U could just write, that they are made in low-distortion Si-technology. Audiophoolz would buy them.Btw, those capacitors are also used in mining equipment (eg. oil rig boring heads).
Silicon-carbon Battery? - Page 1
Forum section: electronics / projects

author: passedpawn
author_rank: Contributor
timestamp: August 14, 2025, 01:47:59 am
content: I just watched a phone teardown and, instead of using the standard LiPoly battery, this had a thinner silicon-carbon battery. Phone is pretty impressive.Was wondering what's the word on the street. I'm working a a thin device now and it seems like a good fit, size-wise. Here's a link to the teardown.https://youtu.be/-bGgUaRPGfE

author: moffy
author_rank: Super Contributor
timestamp: August 14, 2025, 11:44:26 pm
content: The video, what I watched, doesn't mention any novel battery chemistry and if you go to 6min18secs you can read clearly printed on the battery 'LiIon Battery'.

author: kite31
author_rank: Regular Contributor
timestamp: August 15, 2025, 12:59:50 am
content: Carbon is added for energy retention with the trade-off of shorter lifespan owing to the greater expansion and contraction with charge/discharge. Or so I read. It is, as @moffy says, a Li-Ion battery.
Silicon Chip DIY Power Supply Mods - Page 1
Forum section: electronics / projects

author: bjcuizon
author_rank: Frequent Contributor
timestamp: June 15, 2017, 09:12:28 am
content: I've recently come across a lm317 based dual tracking supply design here on the forum and is similar to Dave's one. I want to build it but I have a few questions to ask beforehand.Can I use a 12V RMS AC Adapter instead of the 9V RMS one being specified in the schematic?And..Is it normal for a 12V RMS transformer/adapter to have a 40V pk-pk amplitude? (my dmm said it was around 13.7V and then I probed it with the scope and I measured around 40V)Thanks

author: wasyoungonce
author_rank: Frequent Contributor
timestamp: June 15, 2017, 10:40:44 am
content: Stick to a 9V RMS adaptor. Putting in 12V RMS might develop too much of power dissipation across the regulators.40V PP is 20V half wave which is around 20 x .707 = 14.14 VRMS (around about, actually 20 x (1/sqroot2)). You measured 13.7 which is about right. Depends on if the DMM is true RMS and load on transformer.Sorry I don't know how to enter sqroot of 2 in code for the forum!Edit ahhhh try this:20 x (1/2)..nah! Fail!

author: Gurumurthy
author_rank: Regular Contributor
timestamp: June 15, 2017, 04:16:42 pm
content: Hi bjcuizon,You can choose 14V-0-14V centre tap transformer. when you connect filter capacitor after rectification you can get around 39.592, 28Vrms*1.414=39.592V peak voltage(14V-0-14V can give peak to peak voltage of 28Vrms).Hence You can choose 14V-0-14V centre tap transformer at 2 Ampere Rating because you can take around 2*0.8=1.6 amps at the load. All regulators are current limited at 2.2 amps. Hence provide all regulators with Good heat sinks. good luck..

author: bjcuizon
author_rank: Frequent Contributor
timestamp: June 16, 2017, 05:05:42 am
content: Quote from: wasyoungonce on June 15, 2017, 10:40:44 amThanks. But I don't have a 9v rms adapter. I only have the 12v rms one. And how big should the heatsinks be?

author: rdl
author_rank: Super Contributor
timestamp: June 16, 2017, 05:31:32 am
content: The power dissipation depends on the amount of current you draw from the regulator. At one amp through one regulator the difference is another 3 watts of heat, so if you keep it well below the maximum it'll probably be okay. If the heatsinks get too hot to hold between your fingers, that's getting a bit too hot.

author: bjcuizon
author_rank: Frequent Contributor
timestamp: June 16, 2017, 07:23:02 am
content: I think I will follow the front panel but I will just be using some off-the-shelf perfboard and also I just salvaged some chunky heatsinks from a crt tv that was thrown into the garbage.
Silicon Chip project SC07111891 - Page 1
Forum section: electronics / projects

author: buzzawak
author_rank: Contributor
timestamp: September 28, 2019, 02:46:18 am
content: Hi,I am looking for the circuit diagram/article from a silicon chip magazine project from the December 1989 issue.It is a Digital Voice Recorder Board SC07111891 - December 1989 by John ClarkeThanks

author: coromonadalix
author_rank: Super Contributor
timestamp: September 28, 2019, 03:54:38 am
content: Sillicon chip wont go past august 1995 ??

author: wilfred
author_rank: Super Contributor
timestamp: September 28, 2019, 04:09:03 am
content: If it was bought (available) as a kit then you could try one of the kit suppliers to see if they will email you a PDF of the kit manual. I've done that.
silicon chip project - Page 1
Forum section: electronics / projects

author: buzzawak
author_rank: Contributor
timestamp: October 05, 2019, 02:10:43 am
content: July 2019 issue of Silicon chip in the Circuit Notebook section has a diagram for a 74LSxx series logic tester build around the DS89C430-MNL microprocessor.This is my first foray into programming chips so on a steep learning curve.The DS89C430-MNL is not a cheap chip and from my reading is pin and instruction set compatible with the older and much cheaper 80C52.Am I demonstrating my total ignorancein thinking I can substitute the 80C52 and all will be fine?

author: ledtester
author_rank: Super Contributor
timestamp: October 05, 2019, 03:03:16 am
content: Do you have source code or just object code? If you have source there is a better chance you can account for any hardware differences between the two chips.There are a lot of IC tester projects on the web, and you can make one with just an Arduino.Both of these projects have an extensive test database:https://www.instructables.com/id/Arduino-IC-Tester/https://github.com/akshaybaweja/Smart-IC-TesterFor an historical perspective on IC testers, have a look at:http://www.computernerdkev.heliohost.org/ictesters/index.htm

author: buzzawak
author_rank: Contributor
timestamp: October 05, 2019, 11:13:29 am
content: Hi Ledtester,Yes, I do have the source code for it. Thanks, I will have a read of the links you kindly provided.

author: ebclr
author_rank: Super Contributor
timestamp: October 05, 2019, 06:53:18 pm
content: If you are looking for the tester, not for fun to make, it's an easier patch availablehttps://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20191005105250&origin=y&SearchText=TL866II+&switch_new_app=y

author: buzzawak
author_rank: Contributor
timestamp: October 06, 2019, 12:14:30 am
content: Thanks, EcdirThat's a nifty tool, the goal is fun of the build but I do like the XGecu TL866ii plus -p6I collected a whole bunch of TTLs way back thinking they will come in handle one day.I have decided to have a go at making an 8bit breadboard computer and what to do a tidy up on my inventory first.
Silicon Crystal Graphite Powercells - Page 1
Forum section: electronics / projects

author: lukaq
author_rank: Regular Contributor
timestamp: January 11, 2018, 08:53:04 am
content: can someone explain this? BS or what?

author: xani
author_rank: Frequent Contributor
timestamp: January 11, 2018, 09:00:36 am
content: Technobabble level is certainly very high. Also did you notice 2 wires going to the the device when it is spinning

author: Dubbie
author_rank: Unknown
timestamp: January 11, 2018, 09:05:50 am
content: Just the usual BS. Same as Orbo and hundreds and thousands before that.

author: daqq
author_rank: Super Contributor
timestamp: January 11, 2018, 09:14:10 am
content: I'd love it if he sent one to Dave...

author: moonquasar
author_rank: Contributor
timestamp: January 14, 2018, 03:50:16 pm
content: Looks pretty legit to me.The power output from those cells is relatively low for their size, yet it is plenty to drive a high efficiency motor.Its a brushless motor that captures the flyback/Lenz effects into a super capacitor bank.When he does the load test, he still has to manually start the rotation.The only really weird claim was that it could replace solar.If it's a chemical cell, I don't see how it could be regenerated.To be on par with solar, it would need to actually harvest energy - e.g. - a method to turn thermal or mechanical energy into a voltage gradient.On the whole, I like watching what Q.M. is up to.There is a lot of really cool engineering in these devices.

author: BrianHG
author_rank: Super Contributor
timestamp: January 14, 2018, 05:20:09 pm
content: Eliminate the BS charged stupid Maxwell super-capacitor bank, and maybe I will give it a look. But seeing that in the photo means some authentic BS is going on so I wont watch the video.There is enough storage in that bank to drive a treadmill motor pushing a go-cart with a child riding it for just about 1 city block.
Silicon die identification - Page 1
Forum section: electronics / projects

author: ESEMarty
author_rank: Newbie
timestamp: December 10, 2024, 03:29:29 pm
content: Hi all!Can someone help me to find a datasheet of this silicon die?It's a CAN 2.0 tranciever.The text states Philips VF1142A but I can't find this one anywhere...
Silicon germanium (SiGe) opamps - Page 1
Forum section: electronics / projects

author: splin
author_rank: Frequent Contributor
timestamp: July 24, 2016, 09:11:46 pm
content: I was just looking at the ADA4805 datasheet and was a bit surprised to read:QuoteI wasn't aware of this process. Can we expect improved, ie. quieter, versions of other popular bipolar opamps to appear gradually or are the noise advantages only applicable to low power applications?Is it already widely used? What are the disadvantages?Does anyone know how to search pdf files other than opening them individually in a viewer as grep doesn't work?

author: moffy
author_rank: Super Contributor
timestamp: July 24, 2016, 11:43:25 pm
content: SiGe is as far as I know a high ft bipolar process. As is usual with bipolar you can trade off speed vs power. It is also more expensive so I would only expect to see it used in higher end parts. But thanks for the info, had no idea that commercially available SiGe opamps were avaliable.

author: Marco
author_rank: Super Contributor
timestamp: July 25, 2016, 01:48:23 am
content: Fiber communication and mm wave ASICs have used it (and InP) for a long time, but it seems to be migrating into lower margin products now.There were already quite a few comparators using it, but I hadn't seen any opamps either. Quick google shows TI used for opamps for quite a while already though, in the LMH6629 for instance.
Silicon Labs SMBus/i2c problems - Page 1
Forum section: electronics / projects

author: Psi
author_rank: Super Contributor
timestamp: January 21, 2016, 05:30:26 am
content: Hi, we are trying to use a CP2403-GM LCD controller at work and dispite it being wired correctly and us sending it valid i2c commands it doesn't ever ACK anything.We have tried sending all possible addresses and everything else imagenable and tried multiple chips/pcbs etc. Power is good and chips interrupt pin responds correctly when chip is reset. Just no ACKSo I was wondering if anyone has come across an issue with Silicon Labs i2c/SMBus before. Are there any oddities you know about?

author: AndyC_772
author_rank: Super Contributor
timestamp: January 21, 2016, 07:52:23 am
content: Things I've seen that cause this are, in no particular order:target device is in resettarget device is not correctly poweredpull-up resistors too weak (slow rising edges, logic '1' periods shortenedpull-up resistors too strong (logic '0' level is high)I2C master state machine incorrectly implemented (is it new? Have you checked its output bit-for-bit?)SDA/SCL swapped (yes, I've done this!)master and/or target schematic symbol / pinout incorrecttarget device interface pins in some mode that's not I2C

author: Psi
author_rank: Super Contributor
timestamp: January 21, 2016, 09:09:59 am
content: Thanks for the listChecked- target device is in resetChecked- target device is not correctly poweredChecked- pull-up resistors too weak (slow rising edges, logic '1' periods shortenedChecked- pull-up resistors too strong (logic '0' level is high)Checked- I2C master state machine incorrectly implemented (is it new? Have you checked its output bit-for-bit?)Checked- SDA/SCL swapped (yes, I've done this!)Checked- master and/or target schematic symbol / pinout incorrectPossible- target device interface pins in some mode that's not I2CThe manufacture makes a SPI version and we have been wondering if its actually the SPI version with the wrong markings.

author: AndyC_772
author_rank: Super Contributor
timestamp: January 21, 2016, 10:02:45 am
content: Does the chip have a JTAG interface? I've seen chips go oddly unresponsive before; turned out to be a glitch on JTCK at power up, putting the I/O ring into JTAG mode, and completely disconnecting the internal logic of the device from the pins.
Silicon Oscillator - Page 1
Forum section: electronics / projects

author: House91320
author_rank: Regular Contributor
timestamp: June 22, 2011, 07:00:11 pm
content: Can a silicon oscillator be used to replace a crystal one in all or most situations? If not when and where can they be used?

author: Frant
author_rank: Regular Contributor
timestamp: June 22, 2011, 08:03:19 pm
content: Quote from: House91320 on June 22, 2011, 07:00:11 pmThey can in many cases. You would probably be interested in several such products made by Linear Technology. For example, the LTC6930. It is small, micropower, solid state and has a wide operating temperature range. It is not especially accurate, but for many common microcontroller applications it is good enough. I'd expect it to be more reliable than a quartz based oscillator which is inherently sensitive to mechanical stress.

author: ejeffrey
author_rank: Super Contributor
timestamp: June 22, 2011, 08:51:04 pm
content: Low precision oscillators such as silicon oscillators can usually be used for processor clocks. They can also be used in a number of situations where an AC signal is required but only the envelope is measured. For instance, IR remote controls use a 38 kHz carrier, but the exact frequency can vary be several kHz -- the modulation is only so they can do AC measurements instead of DC. The same goes for basic ultrasonic rangefinding -- only the round-trip time of the pulse is measured. Switch mode power supplies and PWM drivers are also pretty much insensitive to frequency.For measurement applications such as capacitance sensors the answer depends on the resolution you need. A low precision oscillator is still higher precision than most other electronic components, so maybe it doesn't matter much. On the other hand, cheap and accurate crystal oscillators are easy to come by. If precision matters at all, people tend to use them and then try to make the measurement depend on as little as possible except the oscillator frequency.The most important time hobbyists are likely to require the greater precision of a crystal oscillator is in communications protocols. Many communications protocols have very strict tolerances on the clock frequencies. For instance, you might have a requirement that the transmitter and receiver should not have their clocks drift by more than 1/4 of a bit within a single packet. If you support a 1500 byte packet and do the math, your find your clocks need to be better than 10 ppm error over all possible conditions including operating temperature, aging, and supply voltage. High speed protocols use clock recovery, where the receiver's clock is actively synchronized to the transmitter by measuring the timing of the signal transitions, but even then you want to have the clocks start as close together as possible. Communications applications are alsoTimekeeping requires an unintuitively (to me) high precision clock. For instance, that LTC6930 has a temperature coefficient of .001%/C. If you make a watch out of that it would lose (or gain) over 6 minutes a month simply due to the temperature shift between your wrist and your workbench.
silicon strip detector connexion advive - Page 1
Forum section: electronics / projects

author: sdouble
author_rank: Frequent Contributor
timestamp: January 23, 2021, 01:21:27 pm
content: Dear all,I am facing a new challenge. We did design a set of silicon strip detector telescopes comprising thin (70um) and thick (0.5mm) detectors one behind the other to detect and identify light charged particles of 10s'of MeV.the strip pitch is of 0.635 mm ie 1/40". Now My issue : I have to pipe out the signal from these beasts connecting flex cables to the pads.All suggestions about the way to connect pads and cables is very much welcome together with the cable choice and source.
silicone mains wire for power cord - Page 1
Forum section: electronics / projects

author: Homer J Simpson
author_rank: Super Contributor
timestamp: September 29, 2012, 08:49:58 pm
content: I just purchased a Hakko 808 desoldering tool.I works great. One thing I don't like is the stiffness of the power cord. I was looking to see if someone made a silicone replacement, mains rated wire.It would be nice to have as flexible as the the cable from the Hakko station to iron ones as an example.I have checked EBay, ect but have not found anything.Anyone seen anything?Thanks, KT

author: IanB
author_rank: Super Contributor
timestamp: September 29, 2012, 09:01:40 pm
content: I recently bought a RIDGID brand 15 A extension cord for various garage and yard tools and it has a very soft, very flexible silicone like aspect. It was much more expensive than the cheaper extension cords, but you can feel the difference when you hold it and flex it.So you might look out for one of those and cannibalize the cable. What I got was this item from Home Depot:http://www.homedepot.com/Electrical-Electrical-Cords-Cord-Management-Extension-Cords/h_d1/N-5yc1vZbmbf/R-100661449/h_d2/ProductDisplay?catalogId=10053

author: nanofrog
author_rank: Super Contributor
timestamp: September 30, 2012, 04:20:13 am
content: You could also try calling a few medical supply companies to see if they carry/can get any silicone jacketed Medical Grade Power cords (most are PVC, but they do make silicone versions). Just couldn't find anyone online selling them in singles (found Chinese listings for both ready-made and bulk wire, but all with high quantity min orders).

author: G7PSK
author_rank: Super Contributor
timestamp: October 01, 2012, 05:49:09 pm
content: The Cleveland cable company stocks it.http://www.clevelandcable.com/products.asp?id=2253&step=2So does RS.http://az.rsdelivers.com/product/rs/7431501/blk-silicone-insul-mains-cable-15sqmm/1927956.aspx
Silk screen on an exposed pad with no solder mask - Page 1
Forum section: electronics / projects

author: itdontgo
author_rank: Regular Contributor
timestamp: November 06, 2014, 05:01:05 pm
content: Hi,Does anyone know if the silk screen is applied after the PCB is solder levelled/plated so that a silk screen can be applied to what would normally be a pad?You obviously would get a DRC error if you put text on a pad but could a PCB be produced this way intentionally. It's a pad that is not intended to be soldered.

author: DanielS
author_rank: Frequent Contributor
timestamp: November 06, 2014, 05:09:33 pm
content: If you are worried about the exact order in which your PCB manufacturer applies layers, you would need to ask your manufacturer. It would be logical to print all the artwork layers before the solder paste but the only way to be 100% certain is to ask.Same goes for the DRC violations: you always have the option of ignoring them but will need to tell your PCB manufacturer that this violation is intentional and should not be corrected. Otherwise, they might either reject your order, correct your "mistake" for you or possibly do something else.

author: nuno
author_rank: Frequent Contributor
timestamp: November 06, 2014, 11:08:58 pm
content: I know at least one that will automatically remove the silkscreen from where "it doesn't make sense" like over holes.I also know at least one that will just blindly apply the layers, whatever it results it's whattever you'll get.So you'll have to ask your manufacturer.

author: marshallh
author_rank: Unknown
timestamp: November 06, 2014, 11:16:30 pm
content: Many fabs will automatically erase any overlapping silk on exposed copper (by ANDing the soldermask and silk layers)You will have to tell them to NOT do this. The finishing process may not like the silk, it's hard to say.

author: ovnr
author_rank: Frequent Contributor
timestamp: November 06, 2014, 11:21:59 pm
content: Well, sometimes you end up with the fab leaving silkscreen on the pads, but in my experience they cut it.I'd never depend on themnotremoving the silkscreen, though. And it causes issues with HASL finishes in particular.
Silkscreening the part reference inside or next to pads? - Page 1
Forum section: electronics / projects

author: profdc9
author_rank: Frequent Contributor
timestamp: September 03, 2019, 02:13:41 am
content: So I have been designing PCBs, and when I have a through-hole part, I have been placing the part reference inside the box that joins the pads to denote, for example, the terminals of a resistor or capacitor. I do this so that the references don't take extra space and therefore try to keep the PCBs small and costs down. However, it means that after the part is installed, the reference is covered by the part, and a map of the PCB which shows the references needs to be used to find where a referenced part is.On the other hand, the reference could be placed next to the pads, and not inside the box joining the pads, so that installing the part does not cover the reference. The problem I have found is that if you have a high density of parts, it's not always obvious which reference goes along with which part. Then the parts need to be separated even more so that it is clear which reference is associated with each part.So any opinions around here about if it is too much trouble, or too error prone, to require someone maintaining a board where the components cover the references to use a map to find the references?

author: Etesla
author_rank: Regular Contributor
timestamp: September 03, 2019, 02:32:22 am
content: Generally, especially with SMD components, res defs go next to the part. I have hand soldered and done repairs on a lot of dense SMD and THT boards. The most useful thing for me is when the person who made the PCB uses an easily interpreted pattern across the whole board, like only having res defs rotated in two of the four possible rotations, or only putting the res def parallel to the long axis of passive components. Recently, I have been working in KiCAD and using the 'interactive BOM' tool. It serves as my 'map' when I'm soldering and troubleshooting. I believe the file generated by interactive BOM can be handed off people without the KiCAD files as well, but I haven't tested this. In short, look into the interactive BOM tool for your mapping needs and switch to KiCAD asap if you're not already using it:) (I am a fanboy)

author: profdc9
author_rank: Frequent Contributor
timestamp: September 03, 2019, 03:06:41 am
content: I already use Kicad for most of my projects, you can see them athttp://github.com/profdc9For example, this is a board I've made. I have two versions, a through-hole and SMT version for kit builders:The SMT one has the labels next to the parts, because they're small, but the through hole one has bigger parts so I put the reference inside the part box.Perhaps this is a bad idea? I'm trying to keep the size of the PCB smaller as to keep it an economical kit.
Sillicone Keypad SUPPLIER?! - Page 1
Forum section: electronics / projects

author: halkabar
author_rank: Contributor
timestamp: May 12, 2016, 01:16:38 pm
content: http://bettersilicone.en.made-in-china.com/product/QKxJqIbVTEYt/China-Manufacture-Custom-Made-Conductive-Silicone-Rubber-Button-Pad.htmlHi,I'm looking for conductive sillicone buttons for my next design but I can't really find any that I like... I want single buttons, preferably rectangular or square, with the height of at least 10mm. I also tried on Mouser and TME but couldn't find a suitable part. I'd very much appreciate if you guys could recommend good keywords or a supplier maybe... Thanks!:)

author: jeroen74
author_rank: Frequent Contributor
timestamp: May 13, 2016, 09:49:51 am
content: I think these pads are exclusively custom-made with no standard catalogue parts available.

author: halkabar
author_rank: Contributor
timestamp: May 15, 2016, 12:13:39 pm
content: So I'm guessing that would be quite expensive for lower runs?Thanks for the reply anyways!

author: MT
author_rank: Super Contributor
timestamp: May 15, 2016, 01:51:26 pm
content: Make your own!http://sc-fa.com/blog/2010/10/07/silicone-rubber-test-results-and-comparison/http://www.amazon.com/Smooth-Dragon-platinum-silicone-rubber/dp/B004BN9V7AThe sequencer that uses these home made silicone buttons!http://beatseqr.com/
Silpad strip or tape? - Page 1
Forum section: electronics / projects

author: ricko_uk
author_rank: Super Contributor
timestamp: March 14, 2022, 05:48:20 am
content: Hi,I could only find silpad pads or relatively large sheets.Are there any thermal coupling tapes or strips I can use for custom (long and narrow) heatsink to PCB coupling?Thank you

author: ricko_uk
author_rank: Super Contributor
timestamp: March 14, 2022, 04:14:40 pm
content: Thank you evb149!
Silver plating windings on inductors? - Page 1
Forum section: electronics / projects

author: CopperCone
author_rank: Super Contributor
timestamp: February 02, 2018, 05:40:56 pm
content: This has to do with my other threads. In the interest of stability measurement of inductors one of my potential experiments involves plating windings directly on the inductor core.What silver plating method would result in robust windings? I thought that a sucrose and silver nitrate solution could be used on a masked core, then the core could be unmasked and electroplating could be used to thicken the growth. I thought this could be used to make a very stable inductor.Any ideas on the process? Do you think this type of core might actually be less stable but more repeatable?I think that glue used to hold on windings or even glue for copper tape would result in permament or hysterisis with very long time constants, in addition to making drift worse due to high stresses over temperature drift. I thought silver plating would minimize the drift and hysterisis while maximizinf shock resistance.Also it would minimize change in leakage inductance due to mechanical shifts without encapsulant tension.Also, am i right in thinking that a bare unpainted or uncoated core would be more stable? I.e. if the insulated barrier was only located directly under the windings? So the constriction is helical rather then total.I am measuring ppm drifts so all details are critical
SIM card converter  - Page 1
Forum section: electronics / projects

author: GaryT
author_rank: Newbie
timestamp: May 26, 2019, 03:20:44 am
content: Saw that on FB n not sure is that goin to work Sent from my iPhone using Tapatalk

author: NiHaoMike
author_rank: Super Contributor
timestamp: May 26, 2019, 03:31:31 am
content: That's to connect it to some sort of analyzer that uses RJ45 sockets.
SIM7080G - unable to connect with HiveMQ - Page 1
Forum section: electronics / projects

author: twizzter
author_rank: Contributor
timestamp: June 12, 2024, 05:58:33 pm
content: Trying to connect to the HiveMQ broker (serverless option).Documentation says that the endpoint device should have "letsencrypt.org isrgrootx1.pem" certificate installed. Modem has to support SNI as well.AT commands below:Code:[isrgrootx1 uploaded to the modem via QPST]AT+CSSLCFG="CONVERT",2,isrgrootx1.pemAT+CSSLCFG="sslversion",1,3AT+CSSLCFG="SNI",1,"[id here].s1.eu.hivemq.cloud"AT+SMCONF="CLIENTID","1234"AT+SMCONF="URL","[id here].s1.eu.hivemq.cloud",8883AT+SMCONF="USERNAME",""AT+SMCONF="PASSWORD",""AT+CSSLCFG="sslversion",1,3AT+SMSSL=1,"isrgrootx1.pem",""[all commands returned OK]AT+CNACT=0,1OK+APP PDP: 0,ACTIVEAT+SMCONN+CME ERROR: operation not allowedCommunication with the no-SSL HiveMQ broker works fine.The date and time on the modem are set correctly.As far as I understand, the broker does not require any additional certificates. Not sure about this detail, but Simcom MQTT tutorial mentions three files:-ca.crt (assume this is the isrgrootx1 in my case?)-myclient.crt-myclient.keyAny Simcom magicians here?