Questions tagged [pcb]
PCB is the acronym to Printed Circuit Board. A PCB is a carrier for the circuit's components and their electrical connections.
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Help with Connector
I just found this site and was hoping someone can help me out. I'm looking for the empty connector in the pics. This is for a Ford truck 3rd brake light.
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High Insertion Loss on 4 Layer 5.8 GHz Board
I've built a board to serve as the front end of a 5.8 GHz Wi-Fi radio. The boards were built using OSH Park's 4-layer service, which uses ISOLA FR408-HR. It seems like these boards should be ...
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Calculate Required Voltage/Power/Watts/Amps needed to for a device
I am a Mechanical Engineer looking to construct a portable electronic device from the ground up, I am seeking assistance with the electrical aspects due to my basic circuitry knowledge.
At this stage, ...
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Brand new FPGA burnt?
So, when I plugged in my FPGA for the first time, it started to smell a bit like chemicals, and this showed up. Is it burnt, or is it just some type of residue that popped up once I connected it?
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Why is it bad to have unconnected metal areas around PCBs/enclosures for EMI?
I've heard that it is generally bad to have unconnected metal around PCBs due to both safety reasons of charge buildup, but also EMI in the sense that these metal pieces can act as antennas and re ...
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Why is the MOSFET in this fan control circuit overheating?
I’ve designed a fan control circuit using an N-channel MOSFET (STN3NF06L.) The fan operates at 12V, and I’ve isolated the 12V side from the 3.3V microcontroller side using an optocoupler (ACPL-W314-...
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How to connect to "upstands" on the PCB without soldering?
I've got two items of the same model number, but one of them has a Phoenix type terminal on the PCB for the connection. See photo below.
The other one has "upstands" poking out of the PCB.
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Visualizing 2 Layer PCB Return Currents
Hobbyist moving a manhattan-style prototype of an analog FM radio to a PCB for ease of assembly and access to SMT parts. I have attempted a 2 layer FR4 board with a 1.6mm thickness, as I feel that ...
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Does anyone know what the symbol or footprint is supposed to look like for this toggle switch?
I'm trying to make a circuit diagram on Eagle and I can't find the symbol or footprint for this particular toggle switch called 5646MAB (first pic). I would custom make it myself on Eagle but I have ...
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Circuit schema 2 ways WS2812 connect with 1 PCB layout
Hey all I am having a difficut time trying to figure out how to go about the following:
I am wanting to just make 1 pcb but I am using WS2812B LEDs and therefore needs to be in the correct direction.
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Help identify this SOT-23 5 pin component labeled ADU06 and weird behavior
I'm new to fixing circuits and I'm trying to figure out why this board will not boot. I've traced the Vcc on the MCU (H8/38024) to this circuit.
I'm guessing that it is a linear regulator, but when I ...
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USB data does not work on my PCB [closed]
I've build a PCB based on RP2040 microcontroller. A modified version of PicoDVI board - with added memory chip.
The board works fine, with just one problem - it is not being detected when plugged to a ...
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Does DDR3 master clock need to be longest trace in general?
I'm working on my first PCB which incorporates DDR3L memory with an STM32MP157AAB3 processor. I've been following ST's DDR3 guide from AN5122 and I came across something which I found odd and which my ...
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Treating an STM32 MCU's unused pins and reset state
I'm using this MCU from STM2 on a board and the PCB layout is as follows:
I will not use several MCU pins, so they are disconnected as shown above(pin 6, 7, 8, 11, 12 ect.). Also I cannot do any ...
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Controlling a device in a car using a button and ignition
I need to connect a device to my car. I thought about using an XOR gate because:
A - button
B - car ignition.
If the car's ignition is off (0), pressing the button (1) will turn on the device (1).
If ...
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