Using multiple windings on two transformers to create one output at maximum power
Hi everyone, I’ve just resurrected a broken Weller TCP1 and need a 24v ac supply for it....
What software do you use for PCB design?
I’m interested in learning how to make a proper PCB rather than perf board with wires all over the place.
Location of BIOS/CMOS security chip on Thinkpad T470?
I recently bought a thinkpad T470 for a good deal, and it turns out that it was a good deal because the BIOS is locked with an admin password so I can't install an OS, or change any BIOS settings....
Is this one-piece battery-to-PCB "clip" standard (for easy replacement) or a custom piece? +PCB pad ? (discuss.tchncs.de)
Hello,...
Is the efficiency of a DC DC converter Load independent? (www.meanwell.com)
I'm currently looking into various DC DC converters and was confused that the Meanwell DDR-60 series only shows a typical rating but says nothing about the efficiency at idle. From AC/DC converters I'm used to have a curve that starts at idle and maybe 70% and goes to 100% load, having the peak at ninetee something....
Can I get a North American plug for this 36W DC charger? (kbin.social)
I got it with https://sabrent.com/collections/hard-drive-accessories/products/ec-ch2b. But since I bought it in EU, it has that charger. Is there no alternative other than buying a whole new charger?
can someone please help me find this IC charger pump? (discuss.tchncs.de)
i can’t find ANYWHERE this ic chip, not even in chinese online stores. code is FMM862, laptop model is a Gateway GWTN141-10. it can also be another one that works. thanks in advance....
Help Bypassing Timer on LED Lights
Hi all! I recently purchased some push-lights for my kitchen from my hardware store, and I stupidly didn’t read the package that said that they shut off after 30 mins. This is super inconvenient in my dark kitchen, and I can’t return them. I figured I might as well tinker with them, and any help would be greatly appreciated....
Diode Connection Mode MOSFET
Hello! Someone suggested this "If the MOSFET is put into diode connection mode (connect the gate to the drain), you can force a small current (I recommend 1 uA–10 uA; 1 mA would probably be OK; 100 mA would result in significant power dissipation and could influence the results) and record Vds (which is equal to Vgs in this...
How to setup this function generator with this oscilloscope? (imgur.com)
I’ve got an old oscilloscope and a function generator that I’m trying to use to play around and get more familiar with this kinda stuff. I’m mostly new to electronics (especially analog ones) and I’m having a hard time getting them setup properly....
replacement for male connector (beehaw.org)
Looking to replace the male connector in this picture. Any idea what it is called and where I can get it? I'm in Germany.
Help finding replacement charging jack (discuss.tchncs.de)
I have a acer c740 chromebook that has a cracked charging jack hoping I can find replacement part for it. Picture attached shows what's left of some number on it I think it's 150726+F4 not sure what the symbol is. The male end end is 3mm od 1.1mm Id if that helps.
boosted 18650 circuit - parallel or series? Or doesn't matter?
Hi, I'm new here (never used this entire platform before, but as the askElectronics reddit is down I thought i'd follow the trail to lemmy and see what's what). Hopefully this works!...
High Voltage Capacitor Identification
Hi, I've been unable to ID the pictured capacitor to track down a spec sheet or source. Do any of you folks recognize it? Pictured are two different capacitors that look to be identical except for slightly different markings....
SBC UART debug troubleshooting
Right to the point: On a BPI-R3, should connecting the UART debug pins directly to the appropriate pins on a DB9 USB serial adapter (rx->tx, tx->rx, gnd->gnd) work? Because I’m just getting a garbled mess in my serial console. I’ve tried all different baud rates. I’m using a high quality serial adapter (Keyspan Tripp...
Using an incandescent lamp as the "resistor" for a zener/avalanche diode regulated supply
The recent post on using a lamp in series to limit potential fault currents has had me thinking about using them as above. Has anyone done this? I can see advantages, cost for one - wirewound resistors can be expensive. Visual indication of a varying load. Make it "short-circuit proof"..
Safety tips when disassembling old electronics?
I'm taking apart a broken tape recorder produced in the 70s (a Tesla B57, made in Czechoslovakia), to harvest some parts (inductors, switches, ...) and maybe reuse the case for some project....
Weird cable with USB A connector with 5 pins
Hello, I recently bought a USB A to C cable and it is pretty weird. It is a USB A to USB C cable, seemingly USB 2.0 but the A connector has 5 pins, the 4 pins of USB 2 and what looks like pin 7 of USB 3.0 so in the middle of the back row, the other pins of USB 3.0 are not there and the plasting moulding only allows for that one...
What creates resistance in a circuit?
I'm planning to add a momentary switch to a single loop DC circuit. Will this cause any amount of resistance in the circuit? I'm a complete noobie when it comes to electronics, any resource links or clarification is appreciated. I know the type of material/width of wire and a pot will cause resistance but will any component put...
walking from Reddit over to askelectronics on lemmy,ca
Salutations to Davide A. for this creation as an alternate.
MOSFET as Radiation Detector
Hello, we are making a thesis where we use MOSFETs as an alternative radiation detector. So to explain it, it works when the mosfet is irradiated with an external radiation source; its voltage threshold increases, which will be used to determine the radiation dose. I'm currently asking for help on how we measure the voltage...
How to properly size a serial bulb for protection when troubleshooting a circuit?
Hello. I'm a hobbist on electronics repairs, and I did some repairs on stuff powered from the wall socket before, using a serial bulb to protect the circuit in case there's a short. Now I want to troubleshoot a board that works at 3V and very low current (like no more than 100mA). So, how can I properly size the bulb I need for...
[SOLVED] A pull-up resistor increases the low side of a signal, how can I counteract it? (electronics.stackexchange.com)
Solution...
Need to view one of my posts on the subreddit
I have a few old posts on the subreddit and i need to view one of them as i am reviving an old project. there is a comment on one of them that has the info i need. I never screenshotted that info....