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I replaced my laptop’s battery after it was swollen. I found out that services like call2recycle do not take swollen batteries since they are potentially hazardous material. How can I get rid of that damned spicy pillow? In Dallas. Thanks....
Hey all, have I damaged this xbox 360 controller circuit board beyond repair?...
Hey everyone,...
I’m trying to use an LIS2MDL ic with an Arduino nano on a custom PCB designed in KiCad. I tried the Arduino example compass script for the ic and it didn’t work. It just prints “Magnetometer Test” and nothing else happens
//Edit: It’s a SAS drive. thanks for the help :))...
Hello, I have a circuit that will need to return connected hardware to a default state if power is lost. The hardware can handle continuous voltage, so I’m thinking a simple solution would be to use a battery to provide that fallback power source. To avoid draining the battery, I’d like to connect it through a relay on the...
I’m curious and am playing around with a new EDA tool and am looking at practicing by designing a PCB which should be roughly 28x26mm footprint (give or take a few mm…)....
I have a whole bunch of them. They are possibly a bit older (70s, 80s) judging by other contents of the junk box they are from....
As the title says, I’m looking for a Linux/macOS-compatible EPROM programmer. I’d like to be able to program parallel (E)EPROMs in the 27xxx range. The newer XGecu programmers seem to not be compatible with Linux/macOS, and the selection of TL866(II) clones is too overwhelming for me to be able to choose one....
This photo shows the power conversion side of two versions of the same board. Input is up to 60V DC, board converts to 5V and then down to 3.3V....
Circuit is for controlling the fan on a Raspberry Pi, just on/off according to temp, no PWM. Not sure about the diode as it has a .7V drop and it’s a tiny brushless DC motor. No markings on the fan so I measured the current with a multimeter when hooking it up to a USB charger. Circuit was adapted from here using what I have...
Pretty basic question but I am struggling to find the words to get the correct search result. The soldering iron I bought came with very narrow tips that I think are supposed to be used for circuit boards and components....
Do any of you have experienced good products for tinkering together with a 3 year old?...
https://lemmy.world/pictrs/image/24d865e4-966e-416c-937d-321e4ffa3b39.pnghttps://lemmy.world/pictrs/image/d4e99546-a304-439a-b5d9-ebf6b9676eb8.pnghttps://lemmy.world/pictrs/image/d5cec647-3fb6-456b-b1fd-7b7d2059358d.png
This is my electromagnet.
Hello there, This oscillator is a 0V +10v DC oscillator, which after current passes through the capacitor, it produces a -5v +5v AC on the resistor....
Hi! I'm working on an arduino project that has a -12v/0v/+12 psu. +12 is fed directly into arduinos voltage regulator, so there's also a +5v line available. I need to convert a -5v+5v signal to 0v+5v to feed it into arduinos analogue input and I've already mocked up a schematic in circuitjs based on an opamp that seems to do...
Hi!...
I’m trying to repair an arcade PCB with intermittent audio. The board on top is the audio board, the bottom board is the everything else....
I’m trying to replace the jet engine fan inside the PSU of a Nu 1.1 with a Noctua equivalent and am having trouble identifying the connector. The PSU is a Delta Electronics Model EDPS-250AB A, Part Number 400-5494-91....
My room thermometer is consuming a full stack 3 AAA batteries in just 24 hours. I opened it and found that maybe the component circled in green is burnt (CAZB)....
I lost my electric fence tester, probably the pigs ate it. But I opened it once to resolder the earth wire and found it’s really just a voltage divider with resistors and leds, so I can probably rebuild with stuff I have. What resistor values though? 2k to 10k V run through the fence. If any of you good people have a diagram,...
https://discuss.tchncs.de/pictrs/image/e2575314-be01-4a3f-bab2-cc75811b3ce8.png...
Here’s a power cable from a Cmt-ex1 Sony CD player. This connector used to be connected to the inside of the power supply. However, I had to disassemble it because I needed to replace the motherboard for the CD player. I found this CD player at Goodwill, but the wire was poorly connected with a completely different cable. It...
Mates bread maker stopped working so I had a look inside and saw this burned resistor....
