pcb

Dear electronics enthusiasts, I'm working on a rather daring project—for me. I'd like to build a peripheral for the classic Atari ST computer. This computer has a SCSI-like port called ACSI (Atari Computer System Interface). It's essentially a bus that communicates directly with the ST's DMA...

I designed this capacitive moisture sensor, I'm not sure if it will work. I'm posting it here to see if anyone can find anything I should fix before I order the PCB (I'm a student, I don't have a lot of money to waste so I'd like to catch errors before I spend the money).

This is the first PCB I've ever designed, if anyone could look over it and let me know what I could add, something I should fix, or a more clean way to organize the design that would be awesome! I used decoupling capacitors near the power entry for the board, and also near the power for each of...

I have started using these mini/micro module PCBs that are available everywhere. Most come with holes predrilled in them for mounting them onto something? But how do you mount these micro module PCBs? Do you try to find somewhere to drill a hole, like between C4 and D1 in the ground plane? Or...

Hey all. can anyone please suggest ways to pull out the white coloured jumper (in the attached image) from the PCB board? it seems hard to pull it, so wondering if there are any latch/locking involved. thanks. Nio

Hello, I need to create a new design, and the design I am creating needs to work at -60 degrees, but since I am not making a military product, the products I have chosen have a working temperature of -40 degrees. From what I have researched on the internet, a heating path is placed on the...

Hey guys, I'm working on a GSM project using the SIM900A module, and yeah I <Mod: Obsecenity deleted> I totally forgot that SIM900A needs max 4.5V on the VBAT pin. So I went ahead and designed my whole circuit thinking everything is 5V powered, including SIM900A. Luckily, I had already added a...

I am new to making PCBs, but i had the idea to make a 2x7 inch flexible pcb bookmark that lights up whenever a book is closed on it… having trouble deciding what switch to use for this but a membrane switch seems like the best bet… i just have no idea how to implement it into the pcb or if it is...

This is the magnetics connection in my design. This PCB circuitry has been tested and working individually, but when I connect two or more of the same PCB hardware to an ethernet switch, the subsequent hardware would not be able get physical link over ethernet, only the first one connected would...

Hi there. I was gifted a very old pottery wheel as part of a set but it doesn't function properly. 1. It originally would run on full speed when plugged in and turned on. The foot pedal didn't control it at all. 2. Determined that the foot pedal potentiometer was broken so we replaced that...

** Please forgive me if this is not the proper forum for my question ** I am looking for repair assistance or parts availability information regarding my Harman Kardon Onyx Studio 3 portable speaker. Its internal Li-ion battery became depleted. I replaced it, the speaker now operates but it...

Hi all, I'm designing a Power Distribution and Controller PCB for a Clock/LED Display frame and I'm looking for some guidance on the best combination of power supply and PCB layout. I've designed a PCB with 21 WS2815 LEDs and will have a 3D printed frame panel that will hold the boards in the...

Hi Everyone, I am VERY new to electronics and teaching myself how to put together basic PCBs so forgive me if this is a total flop. My goal with this project is to create a PCB that can act as passive or transparent volume control. I want to be able to plug in my record player to the input...

Hi! Its my first time working with eagle and i dont really have a clue how to even start. I want to make a PCB for this schematic but I don't know how to route the traces on the PCB or where to place the components at all. Could someone help me please? That's the schematic im working with. The...

I'm trying to find the oscillator circuit in a ti 84 plus ce, and the oscillator is integrated inside an ASIC with ram and cpu, but there would be a circuit that leads out of it. I've tried voltage testing the test points and frequency testing, but there's many voltages that match and the...

Hi, I am making this splitflap: https://splitflap.home.blog/step-by-step-instruction/ and am doing pretty well with everything - the one thing I am stuck on is working out the components for the master PCB (where the resistors go). I am pretty new to making things with PCB's so a little out of...

Hello. I'm an inexperienced circuit designer and I've never designed a PCB with connector-headers until now. I'm using Harting 26-pin surface-mount connector/header 15110262601000 and I downloaded the footprint and CAD from Digikey and imported them into KiCAD for my PCB layout. I have three...

Hello, I am looking for advice and guidance on a small project using a Genie18 Board and Microcontroller and the Circuit Wizard software. I have attached the flowchart here below, I am wondering why when my program reaches the High output command it registers as a stop command? The system...

I have been recently working on a board which just breaks out a few switches and LEDs for easy soldering to a Raspberry Pi. There isn't much of a circuit, but I would like guidance if I chose suitable resistors, etc. I have two LEDs - APT2012LZGCK (2mA @ 2.65Vf - with a 330Ω res.) and an...

Hello there, I have a biosynex 0075n. I have disconnected battery connector and pumping motor from this PCB. Now can you guys help me to connect again? I want to connect disconnected battery and motor wire in this PCB