Questions tagged [testing]

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25
votes
3answers
3k views

FCC and CE Testing / Failure Resolution

I'm seriously thinking about (practically committed to) taking one of my products through FCC and EC testing and it's my first time doing so. It's Arduino based electronics running off a 16MHz crystal ...
6
votes
5answers
2k views

Testing points in PCB

I am designing a prototyping platform called evive. It is a learning cum prototyping platform for students and makers. Since many times we requires debugging of our circuits, so I thought to include ...
2
votes
3answers
2k views

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 ...
1
vote
2answers
776 views

How are stuck at faults in a combinational circuits considered

I came over this example given in literature explaining the stuck at faults (possible) to be considered in a combinational circuit. I don't understand why g, h, i nodes in the circuit are considered ...
10
votes
2answers
5k views

Continuity tests, risks?

Even though the electronic device is powered off, isn't there a risk of doing a continuity test on connections in the middle of the circuitry ? I mean, you do apply voltage doing so - couldn't that ...
8
votes
5answers
1k views

Best way to test a high current pcb design 70A @ 12V

I designed a circuit (MOSFET HBRIDGE) that Should Be able to handle 70A @ 14V. Now that the board is sent out I am on to thinking about how to properly test it. Right now the most logical way I have ...
7
votes
4answers
4k views

What is a good way to test maximum current?

I am building a device that can power other devices (it has a voltage regulator, battery controller, etc...). What is a good way to measure how much current it will provide, and/or test if it will ...
2
votes
1answer
154 views

Optimizing product tests?

I'm currently working for a company where I design and implement an automated test program to test our products. Currently our tests take quite a bit of time (several minutes per unit) and need to ...
9
votes
6answers
13k views

Any tricks to attaching a wire or pin to a testpoint?

More and more often, I find myself needing to tear apart a device to seek out and connect to serial pads. These pads typically give me access to the underlying operating system for research or ...
2
votes
2answers
223 views

FPGA Jtag Hooking to User Logic

After some primer reading on jtag it looks to be a nifty means to test a FPGA logic design in a consistent and sustainable way. Let's use altera max 10 as an example. I've read this MAX 10 JTAG ...
1
vote
1answer
241 views

Why does smaller step show instability better?

I was stability testing a simple op amp circuit by applying a square wave to the input and looking for ringing etc. on the transitions. I figured, hey, I'll give it a big whack, say from 0 to 5V, ...
1
vote
2answers
208 views

MCU overheating

INTRODUCTION I've designed a custom board featuring a SAME54N20 MCU. This is the third board I assembled but I still haven't got any to work: I didn't get the first board to connect to my PC. My ...
1
vote
5answers
2k views

How to test the maximum secondary current of a step down transformer?

I got a small step down transformer from my local market which has a total of 6 individually isolated winding in it (1 primary of 230V and 5 different secondary wingding with 5 different voltage). My ...
0
votes
0answers
94 views

Darlington Transistor TIP142 same type but different values

I have a bunch of Darlington NPN Transistors TIP142 that are removed from two separate identical boards. The 1st one have the TO−218 CASE (left side of the image) and the 2nd the TO−247 CASE (right ...