Questions tagged [board]
164
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Right transimpedence amplifier choice for input range
I have a device that produces a ±30 nA signal and I'd like to measure this to a 0.1 nA precision.
Since the currents are so low and I don't have much time to make mistakes, I am planning to use a TIA ...
- 1
0
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2
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69
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Kicad 7 - Resize a board
I created a board in Kicad, but doing more work on it, I managed to shrink its size.
All this is unused space.
Is there a way to shrink the board. It is easy to move the edge cuts, but the unused ...
- 1,399
0
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1
answer
54
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USB-C PD Smartphone
My scenario: USB-C 5V smartphone charger is connected via USB-C cable to an breakout board. Both breakout boards are soldered together (All A Pins to A and all B to B). So basically I only extended ...
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I designed a boost converter based off of a Texas Instruments schematic. Can't figure out why they're shorting out after a while
I designed my first DC to DC boost converter, which was primarily based off of the schematics that Texas Instruments provides for it in the datasheet, and then fine-tuned (applying specific component ...
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4
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6
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1k
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What is the name of these plastic bolt type things holding the PCB to the housing?
What is the name of these plastic bolt type things holding the PCB to the housing in the corner here?
Is there a way to remove them and then reattach them? I want to get at the PCB, modify it, and ...
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1
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Which kinds of embedded platforms can be considered well-suited for acquiring a general taste of interrupts? [closed]
I'm an application programmer without much knowledge in low-level programming. I've set up a basic toolchain for assembly programming with the ATMega328P on an Arduino Uno R3 board. One of my aims is ...
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25
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For BGA rework, can a kitchen plate-/dish- warmer be used after preheating in oven?
Doing some casual PCB reworks for repair purposes, I'm looking for ways to improve the process.
Currently, I'm using a (not yet) modified kitchen oven to preheat, and then hot air to reflow.
A problem ...
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3
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3
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444
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Board to board connector on old home theater amplifier
I am taking apart an old amplifier and it has a connector that directly connects two PCB boards. I am unable to detach it by pulling it up. Applying pressure to the two small indentations does not ...
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3
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2
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189
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Board-mounted vs chassis-mounted fuses and maximum voltage on perforated board
I'm trying to build a circuit that uses 400 VAC mains, with a peak voltage of 56 5 V, but let's consider 625 V maximum to take into account mains voltage fluctuations.
I always see fuse holders ...
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1
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1
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155
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Board connector for solder pads
Beginner question: I have a sensor board which has 6 solder pads (in parallel to each other, just a line of 6 pads), but no holes. Do there exist any connectors (like molex) that allow to fit the ...
- 115
3
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2
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277
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Altium Error: "Multiple Path found from location: (XXmm, YYmm) when defining board shape"
I have a small PCB created in Altium. It has flex and rigid parts.
My problem is when I try to change the board shape ("Design-> Board Shape-> Define board shape from selected objects")...
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98
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Layout for fuses with fuse holder
I am designing a PCB with a throughhole mounted fuse holder (ALTIUM designer).
Is there a standard way of sketching a fuse (for ex: 5HF 12-R
, laying them out with the fuse holder footprint (for ex: ...
- 161
1
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2
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276
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Is "Circuit Card Assembly" (CCA) an industry standard term? [closed]
I'm a software engineer who has been working a lot with firmware the past 5+ years. At my current place of employment Electrical Engineers prefer to refer to a circuit board as a "Circuit Card ...
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1
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50
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How to detect if a user has gone past certain locational boundaries physically [closed]
I want to write some software that takes the location of a user's phone and makes sure it is within a certain boundary that is set by "invisible fences"; see the picture below.
What kind of ...
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2
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1
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317
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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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110
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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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4
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1k
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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
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51
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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 ...
- 1,618
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1
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273
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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 ...
user277524
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1
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123
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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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2
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408
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Software to create board pinout diagram [closed]
What software is used to create this (very cool) pinout diagram?
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4
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5k
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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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253
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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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1
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173
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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 ...
- 2,059
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2
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342
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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
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125
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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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55
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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
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603
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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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66
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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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1
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142
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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
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784
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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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66
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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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51
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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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111
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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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4
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598
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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 ...
Sam
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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
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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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2
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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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53
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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
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2
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157
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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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3
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97
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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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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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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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282
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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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1
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181
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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 ...
0
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4
answers
107
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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
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61
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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?
0
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3
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75
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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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2
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1
answer
837
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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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4
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1
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411
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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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