Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [stress-testing]

16 questions
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Puff of smoke in air. 3 different PCBs. PCB has ghosts?

Yes, that is a haiku.  (EDIT: fixed it... it is now actually a Haiku) No I'm not smiling. I'm doing some standard testing; seeing what happens when one of the two power rails gets shorted to GND on a PCB that I designed.  We're talking about a 12 V…
macdonaldtomw
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Looking for a explanation/cause of lithium polymer battery failure

I'm hoping that someone on the EE StackExchange could give me some insight into what is going on with some lithium polymer batteries that I have under test. The question I am trying to answer is: what conditions/causes lead to the type of failure…
RobGah
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2 answers

Switching RJ45 with relays

So I am setting up an automated test environment for an electronic product and one of my needs is to simulate a user pulling the cable from the product. Since only 4 wires of the RJ45(T-568B) cable are used (https://www.iplocation.net/rj45-wiring),…
clds
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How to automatically test the audio quality of a telephone line that randomly goes bad?

I am a computer scientist and I'm working as sysadmin of a small firm where I've been managing also the telephone system that my predecessor put in place. Albeit I don't really have the skill set for doing this, until now it was enough. Since the…
A. Rama
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Are thermal effects on an FPGA different depending on how it is programmed/configured?

I am currently on the fence in a debate regarding FPGA environmental testing (thermal cycling). The question is, can the same FPGA stressed to the same thermal limits yield different results depending on how it is configured/programmed? For example,…
Kierran Purden
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How to test a capacitor?

I've got a big 560 uF, 400 V capacitor and I've tested it with a meter and the capacitance is within spec, same the ESR and it has a vloss of 0.8%. So all seems fine but then I came across this video geizer test'in. In his case there were obvious…
onepound
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MOSFET Vgs Electrical OverStress

I have a design is that over-stressing (EOS) a PFET's (PMDT670UPE,115) rated Vgs by 50% (Vgs -12V, limit is -8V), I want to consider PWM'ing this part with 50% duty cycle in hopes of increasing the part lifetime! We still would be saturating FET and…
Andrew Sauter
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IC package reliability with physical stress

One of the ICs for my design comes in LQFP, TSSOP, QFN and even WLCSP packages. I don't care about the footprint, and the only thing that I want to maximize with the package choice is reliability against physical (PCB drops, bending, vibration) and…
Andriy Makukha
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How to test op amp stability?

I've got a circuit I'm developing using an op amp to drive a power MOSFET for an electronic load: I'd like to test it for stability, but I don't have enough experience to know what perturbations are most likely to show any instabilities. I have the…
scanny
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How to maximize microcontroller temperature?

I need to test how hot a specific microcontroller can get in different situations. The goal is to have the microcontroller heat up as much as possible just by using it. I was thinking I'd need to make the microcontroller calculate something very…
Tonkel
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Generate 10A for stress testing

How could I, a cheapskate hobbyist, generate large currents around 8–10 Amps to run through a short circuit? That is, the objective is to stress test a very low-resistance circuit going through relays, wires, and connectors, all rated for 10 A /…
Rennex
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How I can perform accelerated testing of my PCB board by own?

I am working on a project in which there are system components listed below as module: 8 ultrasonic sensors 12-30 V (Sensor module) 3 DC motors (Drive module) 35 V to 5 V buck converter and a 35 V - 5 V isolated DC-DC converter (Power module) 1…
user274774
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Can an n-channel mosfet gate be held closed for months at a time and still reliably open when Vin falls below threshold?

I made a prototype circuit to detect the loss of individual 12V lithium batteries in a larger parallel bank due to BMS cutoff (12V continuous signal from an individual battery suddenly becomes open circuit). It's just a 10k/5k voltage divider on the…
VanGogh66
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Calculation of Junction Temperature

I have a PCB and trying to measure the maximum junction temperatures of the major components in the PCB which in full working mode. For example like Input Diodes, Buck Regulator ICs, Aluminium Electrolytic capacitors and other Discretes. I have…
user220456
0
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What are the general guidelines to conduct a stress test for an assembled PCB to test reliability after fabrication?

I got a PCB fabricated from a board-house. The PCB contains: DC-DC power circuit protection diodes Atmel ATtiny microcontroller LED's USB hub and interface to a RPi I want to conduct a stress test to understand the limits of operation of my…
Rohit Garg
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