[SOLVED, thanks!] Electronics help, please. This is a 48vdc to 12vdc converter. There's nothing to tell me which wire is the 48vdc in, 12vdc out, and the ground. Can anyone tell which is which looking at this circuit? It's Chinese made. Thanks!
Making goddamn SURE that any gorilla can yank the cable out of this QWIIC socket and it won't come off the board unless the solder itself fails #electronics#maker
Update on microwave/fan hood lamp replacement. I’d bought an LED for it a while back which wouldn't turn off. Also, same brightness for Half or Full. I figured the circuit didn't work due to low power draw, 1.5 vs 25 watts for incandescent. Went to buy incandescent from homedepot and notice their appliance light section consists of those and LEDs with tiny text saying “non-dimmable”, which is another way of saying "no full/half brightness support”.
Tried incandescent and it doesn't shut off or dim either, which probably means the LED somehow broke the circuit? I'm really curious what they are using to control this, seems overly complicated or not very robust. Curious enough to pull microwave off wall mount and take apart? We shall see! #electronics
I'm looking for recommendations for things to help introduce someone to the world of electronics, both instructional materials and hands-on activities like kit building. I've run into a few people now who are really interested after learning about some project, like console modding or repair, and would love to increase their knowledge.
Die blauen LEDs eines Scheinwerfers flackern oder fallen ganz aus. Defekt ist der dazugehörige Transistor. Nach dem Austausch funktioniert der Scheinwerfer wieder einwandfrei.
Ignore the dust. This is the unit bearing the front USB3 ports of my PC case, a CoolerMaster N400. When opening this, I thought I would find a circuit board that I can easily trace and solder. Nope. It's just a piece of black plastic held together by dark forces. The lower port is broken. It works if I bend it upwards with considerable force, but it doesn't stay like that. I assume it's a broken solder joint and there's still a PCB inside. I wonder if the plastic would be able to withstand 150°C or so for 10 minutes. Maybe I could try reflowing it with the case on? #Repair#USB#DIY#Electronics#Computer#PC
Five months later, I finally got around to bringing up my four channel driver board so I can control X and Y at the same time on these. With a hole in the middle of the PCB, this seems like it could actually work as a back-illuminated microscope stage. Not as good as an OpenFlexure probably? But it's just a PCB, simple 3D printed part, and $3 worth of magnets (well, and drive electronics!). The software driving it is #rustlang, of course!
Quick question for all you far more knowledgable types. I noticed that after I put my esp32 custom board into deep sleep it settled to a draw ~23.5uA but 350ms later there was a gradual (over 100ms) increase up to 27.7uA after which it dropped back to ~23.5uA. This happens after each wake and deep sleep cycle, but only once per cycle.
I have a suspicion but I don't want to influence responses - plus I don't really know what I'm doing 😔 - Some obvious known pattern?
Had to roll back to a previous beta (4.0.0 beta
6) to get it to work, but finally #ppk2 is working. Bit of a nightmare as they've basically dropped any support for OS X below 13 for new software builds. Don't seem to be the same restrictions with linux as far as I can see.
Seems I was pretty accurate in my calculations for deep sleep, I though 23.5uA and the PPK2 tells me it's an average of 23.51, peaking at a max of 27.66 #electronics
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Finally got myself one. It's been a long time coming but really wanted to get some accurate data on how good/bad my board's power consumption is. #electronics
We at ZERO GmbH have completed our first prototype to display our own content in vehicle on-board systems. The touch function of the display can also be used to write ZERO in the most beautiful font ✍️ 😅
So...why all this? With the help of our AMPS platform, our customer can easily show new designs or functions in a vehicle and bring them to life - without having to access the series components directly.
And "easily" really means "easily":
Connect computer viaHDMI => switch on via button or CAN => be happy 🥳
A couple of weeks ago I finished a beast of a project.
The interactive installation (titled InStability) is an artistic endeavor to demonstrate how seismic stations in Iceland detect earthquakes.
Visitors are invited to touch the map, triggering "earthquakes", and observe how LEDs, representing seismic and GPS stations, light up as the seismic waves propagate across Reykjanes peninsula.
#Fake operational transconductance amplifiers I bought on #EBay over 6 years ago. Date code doesn't make sense given that Intersil discontinued the #CA3080 over a decade ago. The real chip should have a diode across pins 4 and 5. Only one chip seems to have it -- but it is reversed. The rest have resistors between pins 1 and 4, and between 4 and 5, consistent with an op amp that provides offset null pins. Pin 8 also seems to be connected. Both 1 and 8 should be NC. #electronics#opamp
At least the single rail #opamp#oscillator circuit works with these counterfeit chips. Maybe I'll turn them all into #LED blinkies and Schmitt triggers.
In my dreams, there exists something that is as simple to write code for as the Arduino, but it's as fast as the latest AMD or Intel chips. This would greatly help me with the #synthesiser prototyping. #electronics