Questions tagged [board]

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Does anyone know what CJMCU on breakout boards means?

I have recently been looking at a lot of breakout boards and noticed they have CJMCU in their description and even printed on them. Initially I thought it may be an acronym and then thought it may be ...
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0 votes
1 answer
106 views

What is the black, finned, metal part in this picture of a board?

Can someone explain what this black part is? This a WLAN module.
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5 votes
4 answers
1k views

Guess power from board?

I ordered a small <1mW laser off of ebay that comes with a small controller board. I tested it briefly with a 9V battery and it works fine, but I don't want to use it extendedly without knowing ...
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1 vote
1 answer
48 views

What parameter dictates the analog output speed for this board?

I plan to use this I/O Device for a project where the the analog output should be able to settle to a value for a 100 kHz moving point scan device. Meaning that between point A and point B the analog ...
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  • 1,117
0 votes
1 answer
139 views

Solder paste and perfboard/prototype board/donut board destroying the circuit?

Does perfboard/prototype board/donut board made of paper or something (at least it's not fiberglass, that much I know) become conductive when heated to the point of becoming black? I'm assuming these ...
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0 votes
1 answer
62 views

Connecting development board board to sensor [closed]

I am trying to connect a Nordic nRF52840DK board to the LSM6DSL sensor (accelerometer) on a STEVAL-MKI178V2 adapter board. The goal is to successfully connect the devices and test the sample program ...
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0 votes
2 answers
192 views

Software to create board pinout diagram [closed]

What software is used to create this (very cool) pinout diagram?
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3 votes
3 answers
1k views

Altium not showing PCB's body in 3D view

I am trying to copy the Arduino schematic, but when laying out my PCB in Altium I have issues with the 3D view. As you can see from the picture below, the PCB appears without problems in the board ...
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  • 61
0 votes
0 answers
77 views

Programming Custom STM32F446RE Board With STM32F446ZE Board

Hi I made a custom board by following the NUCLEO F446RE schematic from ST microelectronics website. Here's a picture of the board: As you can see on the bottom left of the picture SWD connections are ...
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  • 53
0 votes
1 answer
90 views

Can someone tell me how i make the MACH3 software to communicate with this board?

I have a project to do in which I will need to use this board to move one of the axis of a machine. But I can't find the datasheet for that board. It serial number appears to be HW-3561224. Besides, ...
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  • 355
0 votes
1 answer
76 views

How come the microcontroller of this board is being powered in this configuration?

I have this development board with the following pinout: And I am using the following FTDI to USB interface to communicate with a PC: Here is a photo of the board and the FTDI wired to the board ...
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  • 1,483
1 vote
2 answers
145 views

Trying to find and bridge USART pins from the manual of an STM32 board

I am trying to solve an issue regarding a firmware with this 64-bit Nucleo Board. I have the hex file and can see the ready source code but when I upload the firmware I am not able to communicate ...
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  • 1,483
0 votes
1 answer
107 views

What type of rectangular chip is this? And how does one even know how to identify chips on boards?

I have a two Playstation 5 boards which are identical, but one of these chips are labeled differently (C1 and A6). What are they and what do the labels indicate and how do I source this type of chip? ...
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0 votes
1 answer
51 views

Need help explaining and more details and answering the feedback for PCB board [closed]

i need help with my doc. I do have to inspection and assembly PCB board I this is my steps are 1-First, I will make sure the PCB board does not have any damage by visual inspection PCB and see if ...
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  • 1
0 votes
1 answer
207 views

Thermador oven circuit board troubleshooting - where to go from here?

I have a Thermador double oven unit that is not working correctly in one of its cooking modes. I have done some troubleshooting, but haven’t located the problem to my satisfaction. I wanted to see if ...
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0 votes
0 answers
38 views

Cold Reset STC125A60S2 PLC Board

I am working on these PLC Board: http://more-suns.com/product/html/?321.html but I cannot contact manufacturer. The fact is to have it programmed I have realized that I can only do it after a cold ...
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0 votes
1 answer
46 views

Which components should be checked on a faulty tv power supply? [closed]

So, I'm new to working with electronics and I didn't study electrical engineering or anything related. I've collected some dead tvs and monitors over time hoping that I'm gonna fix them. I managed to ...
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1 vote
1 answer
563 views

KiCAD - Design rules for fabrication boardhouse [closed]

This is my first time designing a PCB with KiCAD. I plan to send them to JLCPCB for assembly. There are a ton of parameters to be set like track width, via width etc. If these are set wrong, then the ...
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1 vote
1 answer
62 views

Ebike 24v relay board - switch?

Hi I’m building an Ebike and using a reclaimed relay board from an old electric moped. My question is the relay board has 3 small wires presumably for the switch, but this confuses me as I only need 2 ...
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2 votes
0 answers
49 views

What programmable board should I use for my project? [closed]

I have a small project going on, you can call this a research project that I needed to pass a certain class。 But the thing is, I don't know what I should use Arduino? Raspberry Pi? Im a complete ...
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0 votes
1 answer
102 views

Problem with making an Arduino-like board

I'm making my own Arduino-like board with an ATmega328p and an FT232RL. After realizing the circuit (making sure everything was correct) I had some prototypes made by JLCPCB. Later I bought the ...
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1 vote
1 answer
300 views

How to create a break away to cut the board

I am not a expert with Eagle 9.6 but I created a nice PCB. A friend of my is going to assembly the part with a pick and place machine. He asked me to enlarge my PCB to be able to fix the board and ...
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1 vote
4 answers
346 views

Fine wire for breakout board soldering that won't break

I've been using silicone sheathed stainless steel wire (30 awg) with a 1.27mm breakout board. The wires cannot be secured (it's tight in the thing I'm building), and they easily break off at the point ...
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24 votes
8 answers
3k views

LEDs on boards - pros and cons?

OK - I tend to design high value low volume boards so my view of this is biased. I like to sprinkle a lot of LEDs around my boards. One (red) LED for every power voltage on the board. Multiple s/w ...
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1 vote
1 answer
61 views

Using a Renesas evaluation board as a Programmer

I am new to using renesas microcontrollers, and could use some advice from someone with experience using them. I found this rl78 evaluation board and a quick reading of the product description on the ...
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0 votes
2 answers
87 views

Development Board

i gained some experience with ARM and especially with STM32 MCU models.Now i wanted to start learning x86_64 architecture and my initial goal was going towards it. Is there any good development boards ...
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1 vote
0 answers
43 views

Bluetooth Receiver Board - Noise Problem

I recently bought a bluetooth receiver board in order to add bluetooth to my car, this however is not as easy as I thought. I am not very skilled with electronics. I have an aux audio input in my car ...
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0 votes
2 answers
98 views

Do electronics companies publish the diagram of their electric boards

I'm new to the electronics world, and I came to know that electronics companies (As Fairchild) provide datasheet for the components they produce (As IGBT, Triac, etc.). Do electronics companies (As ...
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1 vote
3 answers
87 views

Can I build a 4A circuit on cardboard?

I'm planning to build a 12V 4A circuit, and I was originally going to put it on a strip board. However, the board I ordered came broken (and each piece would be a bit small for building a circuit), ...
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0 votes
1 answer
58 views

Can you help me identify this board?

I have found this board installed and I am unsure what it is or what its function is. I have googled it to no avail.
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0 votes
0 answers
30 views

Position of global fiducials

I have two question for placement of global fiducials on my board: In the board below you see two fiducials and a component (SMD connector). I would like to place the connector on the very edge of ...
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0 votes
0 answers
229 views

How to refresh many capacitors quickly

I'm working in an embedded space, where I need to keep voltages on a bunch of capacitors (RC circuits). Currently, I have an EEPROM with some data value for each capacitor. There is 1 DAC that feeds a ...
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  • 101
2 votes
1 answer
137 views

What is the role of the four-pin header on this USB relay board?

This is a commonly available relay board with a USB HID-like interface. I haven't been able to find a datasheet for it on the sites that sell it. On its right side there's a four pin header. I'm ...
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0 votes
4 answers
93 views

How can I calculate the minimum switch time between main battery and back-up battery for my board?

I have UpSquared board for an embedded system. I have a main power supply(battery) to feed it and I also have a back-up battery for some situations. For example, something happened and main battery ...
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1 vote
1 answer
61 views

In sale or custom made?

RJ45 to 8 pos board connector. Board connector width: 12,4 mm Pin pitch: 2 mm Found inside a plastic card printer. Somewhere to purchase cable? Identification of the board connector?
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0 votes
3 answers
68 views

What is the typical delay relative to to the maximum delay?

I have a board with a number of ICs, an FPGA, and some flash and RAM devices. The board is designed based on worst case conditions, as it should be. The critical combinatoric path has a maximum ...
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  • 529
2 votes
1 answer
565 views

Low cost connector for two stacked PCBs

I know we should not ask for product advice here, but I searched a lot for a specific board connection solution lately and it almost drives me crazy that I have only found so little options. I need ...
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  • 5,954
4 votes
1 answer
323 views

Dave Jones' uCurrent Gold - trace to shunt resistors has no soldermask

I was going through the uCurrent project and noticed something that seemed unusual to me. In the image, the trace connecting R1 to the input jack is (a) of differing trace widths, and (b) has no ...
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  • 145
0 votes
3 answers
1k views

How does a board file (brd) differ from a Gerber file? Why use one over the other?

There are several graphical PCB viewers available and they read what appears to be a standard board file (.BRD) format. Eagle and other PCB designing applications generate board files, but also ...
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  • 1,987
0 votes
0 answers
75 views

Raspberry pi not getting any data from hx711

I'm trying to combine two boards into one: SparkFun Load Sensor Combinator(basically just a wheatstone bridge) and SparkFun Load Cell Amplifier. The data will be transmitted to a Raspberry Pi 3 so ...
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4 votes
1 answer
3k views

What item could this PCB board be from? (NOT serious, misc. question) [closed]

This is a fun, light-hearted question and not meant to be taken too seriously. As a little fun thing between a group of friends, we found this question on a desk at work sometime ago about a PCB that ...
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  • 59
0 votes
2 answers
91 views

Board to board connectivity [closed]

Need to connect two boards together. Initially I thought about using a ribbon cable like this one, but everything I found was significantly longer than what I needed (~30mm max). Are there any other ...
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  • 101
1 vote
2 answers
816 views

Is there software for converting a picture of a board into an schematic?

I need to reverse-engineer several simple single-sided boards. I have very good quality pictures of them so I was thinking that maybe there is software capable of getting the schematic from the ...
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1 vote
1 answer
125 views

What is the proper term for a board that replaces a chip?

I've been working on some vintage electronics lately. In the course of this work, I've found that in some cases it is much easier to design a circuit to replace an old DIP chip that has failed than ...
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2 votes
2 answers
143 views

Copper layer delaminates on Printed Circuit Board

I have been making the PCB boards by the conventional process since last few years (pressing, etching, drilling, soldering). I usually iron the photo paper to the PCB board for around 15-20 minutes ...
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0 votes
2 answers
201 views

Reading current memory image from a micro controller

I have the MPLAB XPress Evaluation Board, which has the PIC16F18855 microcontroller on it. The way to program it is just to copy a ...
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0 votes
1 answer
116 views

What is Mikrobus purpose?

I'm new to embedded systems. I have MPLAB Xpress Evaluation Board. I see that the board has MikroBUS connectors. Going through the internet, I couldn't understand what is the purpose of the MikroBUS? ...
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0 votes
1 answer
419 views

What QSPI chip is on ItsyBitsy M4 Express?

I'm trying to find out the name of the QSPI chip that is used on ItsyBitsy M4 Express boards. On the image below is very faded:
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  • 115
2 votes
1 answer
3k views

Can I use a 22 microfarad capacitor in place of a 10 microfarad capacitor?

I have a bad 10 microfarad capacitor 400V but can not get a replacement. Can I use 22 microfarads 400V instead?
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5 votes
1 answer
208 views

Named nets not connected in Eagle board design

I set up my schematic in Eagle and used named nets to make all of the connections. If I highlight any of the connections in the schematic everything lights up properly. When I switch to board design ...
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