Questions tagged [test]
A definitive procedure that produces a test result.
206
questions
0
votes
0
answers
369
views
Schottky diode EAS test circuit
I'd like to test the non-repetitive avalanche energy (EAS) of a particular Schottky diode (VS-12CWQ10FN-M3), but I've never done this test before and can't find a typical test circuit. This comes from ...
- 1,167
1
vote
1
answer
93
views
Measuring 150kHz, ~30V peak waveform with good resolution
I am trying to choose test equipment for a systems test application and I am running into a road block with one of the specs I need to meet.
The device features an H-bridge output similar to the ...
- 11
0
votes
0
answers
349
views
USB 2.0 Signal Integrity Using HSETT
I am trying to test USB 2.0 Signal integrity (Eye Diagram). For doing that, USB IF Forum lets you download the EHCI HSETT Software from their website. However, I am not able to use it due to one ...
- 167
0
votes
0
answers
299
views
RS485 - Comunication lost during EFT IEC 61000-4-4
I'm having throubles with communication over RS485 in harsh industrial environment.
We perform test in EMC lab, acording IEC 61000-4-4 = Fast transient (also known as Burst).
We used burst generator ...
- 121
0
votes
1
answer
107
views
Applying Ripple to a DC Source?
I have a system that is powered by a 25V Lithium ion battery pack. I need to test the system with a 1 Vpp sine applied on top of the 25V supply, so 25V +/- 0.5V ripple.
I know theoretically to get ...
- 3
3
votes
3
answers
891
views
Should you Megger test transformers?
I have heard people say you shouldn’t Megger test transformers because the high voltages used might cause insulation between windings and between windings and the core to breakdown. Is this true?
...
- 131
0
votes
3
answers
2k
views
Power Supply Earth for Bench Testing
I work in a typical electronics lab, with resistive earth mats, ESD straps and isolated DC power supplies to test prototype PCBs. I prefer not to use the power supply earth-ground, and to leave the ...
- 3
1
vote
4
answers
2k
views
Temporary but hands-free JTAG/SWD connection
I have a PCB that will have very little clearance on both sides so that putting a normal Cortex SWD .50 spacing connecter is too big. However, I'd still like to have the option of connecting via SWD ...
- 459
2
votes
2
answers
7k
views
How do we test and determine if a USB cable+connector is version 2, 3.0 or 3.1?
How do we test and determine if a USB cable+connector is version 2, 3.0 or 3.1, without using port, PC and/or having data transfer but instead with basic physics tests e.g. using multimeter?
user154285
1
vote
1
answer
168
views
Is there a good way to test your schematic before buying the parts and building it?
I'm trying to design a BMS that can handle 12 cells, be powered either with a isolated dc-dc converter or the batteries themselves and uses active balancing, but I'm not sure if my design will work:
- 145
0
votes
2
answers
3k
views
How to test a TRIAC with just a digital multimeter and no external circuit
I need to fix an electric kettle and would like to test the health of the TRIAC BTA20. How would you test this component health with a digital multimeter - without any extra components and ideally ...
- 15
1
vote
1
answer
1k
views
Built-In Self Test LCD
I've recently been trying to connect a custom LCD (ET101005DSAK0) to an Embedded System on Module however without any success. When debugging why the LCD is not working I wanted to make use of the ...
- 671
2
votes
1
answer
636
views
Electronically verify whether a cable is connected to an RJ45 connector
Background:
I have a device that interfaces with a motor controller over RS-485 via an RJ45 socket. Currently, the port is a standard 4x2 RJ45 connector with the RS-485 using pins 2 and 7.
Currently ...
- 21
0
votes
2
answers
179
views
Can I connect 10 AWG wire carrying up to 25 amps to 10 parallel 1 ohm 10 watt resistors?
I am trying to measure the charge capacity of some LTO battery cells. To do this I want to discharge each battery cell from 2.5 V to 1.7 V. I am going to measure and log the current over the discharge ...
- 107
2
votes
1
answer
631
views
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 ...
user132893