Questions tagged [production-testing]
Production Testing is sometimes called in-line testing. That is the PCB or assembly is completed but is only a sub-assembly. There can be many sub-assemblies to get to the final product. In-line testing is used to make sure sub-assemblies are fully functional per engineering standards, then sent to the stock room to be issued for the next assembly level. This procedure assures but does NOT guarantee that the final product will pass final testing.
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JTAG ID to differentiate similar devices
Is there a reasonable way to identify different boards with the same parts through JTAG? I have a family of boards that all have the same Zynq CPU but various hardware configurations. I'd like to be ...
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How do you calculate wasted power in a Line Regulation Test?
I was curious about this scenario-- there is a voltage regulator we are testing (LM805A) and we have to perform a few tests: No Load, Line Regulation, Load Regulation, and Dropout voltage test.
Beyond ...
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How to test for PCB ground being pulled up to 2V when connected to RS485
I am currently trying to find an easy way test to diagnose a problem on some of our PCBs where the ground of the PCB is being pulled up to 2V's.
The Board
Simple modular RS485 sensor board. The main ...
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Alternatives for a physical relay to disconnect pins of an MCU board from testing jig?
There is a certain system (PCB) which is built around an ARM microcontroller. In order to test the system, I used a DAQ by National Instruments which is able to simulate various conditions (both ...
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Choosing right equipment for the Test Fixture
I'm planning to build a "Test Fixture" which tests PCB via PC that reads data from the I/O module. And since i want this project to be flexible to the PCB change, my preference gone towards ...
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Soldered test point on production board?
I understand having test points on a production board, but what would be the point of selectively soldering some of them? It doesn't modify any resistance, right?
I assume that the large numbers of ...
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Is scavenging parts from consumer electronics for own commercial products, a good idea?
I have a product that I'm trying to bring to market. For prototype I pulled a camera PCB from an old webcam. It so happens that because my volume of production is low it is actually three times ...
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What are the IEC standards/certifications to look for in a DSO while making measurements pertaining analog parameters like CMRR, SNR, THD etc
I am in the process of measuring CMRR for our mixed signal system that deals with bio-signal acquisition. I am using DSOX2014A keysight entry-level oscilloscope to make measurement to derive CMRR, SNR ...
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How to program MCUs and test PCBs in mass production?
I am working on a PCB which includes an microcontroller (STM32), some sensors and a BLE module. Right now it is still a prototype, only 3 units have been produced.
To program the microcontroller, I ...
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What's wrong with evaluation boards in production?
I've correctly tested an ESP32-WROVER MicroController and an ADXL355 sensor. Both these devices are on evaluation boards and the fact is that they are very handy: the MCU include an USB female, a ...
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Cooling circuit board for troubleshooting
I'm trying to troubleshoot an LCD TV. It turns off at random intervals I'm guessing as it heats up with use. I want to determine which PCB is failing with heat, and then even isolate the area on the ...
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How do professional designs compensate for offset voltage in opamps?
I am new to electronics and have been told in class to always add precision potentiometers to compensate for input offset voltages in opamps for signal conditioning. My concern is that this offset ...
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Position components in KiCad for a test rig
I'm designing a test rig for a product. There's a number of test pads and a power connector on the PCB, which I want to match up with a tester device, i.e. the tester PCB should have pogo pins and the ...
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Op-Amp Comparator Testing
I am having this op-amp Comparator.
My circuit is similar to this circuit present in the datasheet of the IC, page 21.
I have this circuit now in my board which I want to test. I have never tested an ...
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MATHCAD for electronics circuit analysis usable for production testing
Do anyone have any Idea how to use MATHCAD for electronics circuit analysis.
For example, can I find the Worst Case Analysis ( maximum and minimum values at testpoints) of a complex DC circuit for ...
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