Questions tagged [testing]
The testing tag has no usage guidance.
217
questions
0
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2answers
34 views
Low impedance voltage testing (LoZ)
Is there any issues with using low impedance mode on a multimeter for day to day testing on mains voltage 240Vac or if this mode should only be used when testing for phantom voltage?
Is there any risk ...
2
votes
1answer
90 views
How to solder these tiny pogo pins?
I bought pogo pins to use for firmware uploading.
So I have to make a Jig for my PCB,
but this is the first time I use pogo pins.
I have no ideas where I have to solder, I mean I want to know if ...
0
votes
1answer
54 views
What is the most straight-forward way to simulate this circuit?
I would like to verify the function of this circuit, as well as determine the power usage and heat generated by each component. (I need the latter for doing a thermal analysis)
The circuit has been ...
3
votes
1answer
144 views
The TI quad-XOR gate acts as it is short circuit
I have a TEXAS INSTRUMENTS CD4030BE Quad Exclusive-OR gate. I have an electronic board of
simulate this circuit – Schematic created using CircuitLab
using this and this refrence. According to ...
5
votes
1answer
258 views
How to check if my quadrature encoder is broken or not?
I have purchased some cheap quadrature incremental encoders (YUMO E6A2-CW3C) for which I have found "a" data-sheet here. Now based on my limited knowledge the quadrature incremental encoders are ...
0
votes
1answer
39 views
Are pads from the EAGLE “testpad”-library printed?
just a quick question.
Are EAGLE "testpad"-library printed or seperatly bought and mounted?
E.g. "testpad / PTR1"
TEST PIN
Footprint: B1,27 (Version 1)
TEST PAD
3D Package: B1,27 (Version 2)
TEST ...
3
votes
1answer
69 views
Transistor pad layout for efficient use of prober
As we are a materials company the expertise is not in EE, so I am asking a very simple question. I tried to search online for this, but could not find an answer. We are making transistors with our ...
1
vote
1answer
21 views
Recommendation ITU-R BT.1729 test image for 5:4 display
For radiated emissions testing according to EN 55032 CISPR 32 with displays of category 4, there is a Recommendation ITU-R BT.1729 which specifies a reference test pattern. The pattern is designed for ...
0
votes
1answer
45 views
Automated testing - disabling a GPS antenna [closed]
I am doing automated testing on a module.
This module has a SMA connection to a GPS antenna.
I need to automatically (programmatically) disable the connection to this antenna somehow.
What would be ...
0
votes
1answer
48 views
Standard time for LED light testing [closed]
What is the exact timing for testing(continuity, electrical parameter, optical parameter, thermal parameter) of LED lamp after manufacturing?
0
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1answer
43 views
What can I do on the bench to determine if a power supply does or does not add back a PFC (Power Factor Correction)?
I'm given a AC to DC power supply with only the inputs and output specified. It was probably made after 2000, and the ENERGY STAR program mandate to add PFC correction to power supplies may or may ...
0
votes
1answer
44 views
Measurement of Quiescent Current and Operating Current in Gate driver
In datasheet they have provided two parameters named Quiescent Current and Operating current in which I am measuring quiescent current i.e, ground current flowing from the device VDD to GND , when ...
0
votes
1answer
44 views
How could I measure RF transmission power from SMA connector without having a RF wattmeter equipment?
I need to measure the RF power of a radio transreceiver, and since I haven't specific RF wattmeter equipment,
I'm wondering how I could do this using a classic multimeter.
I would avoid to ...
3
votes
1answer
94 views
Self Certifying for FCC testing
I have been tasked by my current employer to look into the costs of self certifying. With past companies I have worked for, all of the tests were at a 3rd party lab. The closest thing I have seen to ...
0
votes
1answer
29 views
High/ Low level output voltage in gate driver datasheet
Gate driver datasheet mentions about VOLL and VOH with test conditions Iol=100mA
I am testing this using this setup by calculating value (ron of pmos is 7.05 ohms) of load to be placed, Is this ...
0
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0answers
53 views
Automatically disconnecting a F connector
I have no electrical engineering experience.
I need to test a module, this module has what I believe to be a F-type RF connector to a device. I need to be able to disconnect that RF connector ...
-1
votes
1answer
26 views
Custom Test Fixture for LCR meter
I've designed and built a custom test fixture (based on Keysight's 16047A) to be able to measure multiple pin capacitors.
When testing it to compare both fixtures (the custom and the original), I ...
2
votes
2answers
476 views
What is the meaning of “do not populate test points” in a board schematic
I was finding test points in a schematic of an Analog Devices Evaluation board. In one of the schematic pages, there is a clause mentioned "do not populate test points".
Does anyone knows what it ...
0
votes
2answers
30 views
Synthesize ATPG Test vectors with 'X' Values
I am working on synthesizing generated ATPG test vectors and implementing them on an FPGA. However, there's plenty of "don't care" values 'X' in the stimuli and response vectors.
I am not sure how ...
0
votes
1answer
93 views
Embedded Software Reliability Metric is short-term or long-term in time
If I test an embedded software (and the product based on this software) today and it fulfills all the customer requirements successfully at this point in time then I can safely say that this software ...
2
votes
0answers
29 views
Switchgear dielectric testing and impulse polarity
What is difference between negative and positive polarity impulse test? Why Negative only done for internal dielectric strength and positive polarity impulse only for external dielectric strength? ...
1
vote
2answers
38 views
Adjacent Signal Selectivity: Section 6.1 of ETSI EN 303 372-2 (RED testing). Bad procedure/standard?
I'm doing pre-certification testing to ETSI EN 303 372-2 V1.1.1 (2016-04), specifically the Adjacent Signal Selectivity test in Section 6.1.
I am a Systems engineer with lots of experience designing ...
-1
votes
2answers
81 views
In Circuit Tester design
I wanted to create an ICT to check for shorts and validate some of the voltage levels on a PCB that I created, using a jig. I have placed probe points on the desired nets and will be using pogo pins ...
2
votes
1answer
88 views
How to connect to tiny pogo pins in test fixture?
I'd need to build a test fixture with very small pogo pins (1.27 mm spacing between the closest pins). I've seen fixtures before that use very long, very thin pogo pins almost exactly like this one ...
1
vote
2answers
44 views
Should series connected battery cells have similar internal resistance and to what degree?
I have some Toshiba SCiB cells that I wish to string in 4s configuration. These are Lithium Titanate (LTO) cells. They have a 20Ah capacity and operate safely between 1.5 V and 2.7 V. The cells were ...
2
votes
2answers
186 views
Reserve Capacity Testing On Lead-Acid Car Battery
All car batteries have Reserve Capacity ratings instead of Ah ratings for deep-cycle batteries. Using this data to test the health of the car battery a good way to estimate life left?
Let say I have ...
1
vote
1answer
112 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 ...
0
votes
2answers
68 views
Quality Control Tests for hardware
We are in the process of creating a quality assurance & control department at work.
I need to define different tests for the hardware that we make.
The devices are composed of multiple pcbs, with ...
0
votes
0answers
86 views
EEPROM and Flash testing
I am looking into the best practices for EEPROM and Flash memory testing. We are talking about end of line product testing by an ATE. The goal is to identify defect chip before writing memory content. ...
0
votes
1answer
57 views
Burn In component testing
For pre and post electrical testing of burn in components under test: what is the best way to measure current and voltage through said burn in components before and after burn in to verify if the ...
1
vote
2answers
49 views
Input power requirements for “load regulation” tests on DC power supplies
My question is this: What is the convention, if any, for specifying a power supply's input voltage value when performing a load regulation test?
Background
A typical specification for DC power ...
1
vote
0answers
67 views
switch without diode
I have a project where I need to put a switch in between the resource from tester and the DUT.
My DUT is a 48 pin device (semiconductor IC), each of the pins has its own ESD diode. The switch, for ...
1
vote
2answers
31 views
Product Safety Testing - EU
I was recently hit with the thought as to what safety tests a domestic electronic product has to go through before it is sold to consumers more specifically in the EU?
I have been looking through ...
0
votes
1answer
24 views
Understanding Transition faults
I learned that the transition faults model checks whether data transition meets the clock or not
Transition Faults : Assumes large delay defect concentrated at one
logical node, such that any ...
0
votes
2answers
47 views
How can I test a DC car blower motor with an external resistor?
How can I test a DC car blower motor with an external resistor? (note that there is an existing question about testing DC motors, but the assumption there is that it has an internal resistor, and it ...
0
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0answers
114 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 ...
1
vote
1answer
101 views
Is there a variable forward voltage diode-like device or circuit construction?
I need to make a test PCB for an LED drive circuit that can drive a variety of different single LEDs. The forward voltage (Vf) of the LED could be anywhere from ~2.2V up to ~6.5V. I'd like the test ...
4
votes
1answer
74 views
What are the tradition ways to signify/advertise that a potentially dangerous long-running test is in progress? [closed]
I frequently need to run long-term tests which have some potential for damage or harm if e.g. someone disturbs the test apparatus without being aware that it's running a test.
Say for example ...
0
votes
2answers
125 views
Is diode with forward voltage ~0.15v faulty?
I tested a diode model SB360 PFS which it showed about 0.15 forward voltage. The reverse voltage is zero.
Looking the diode specification I read that Vf is 0.49v to 0.68v. So my question is if this ...
1
vote
1answer
205 views
Switching Mode Power Supply Fluctuating Output
I designed a switching mode power supply using LNK-562, I share the circuit schematic below.
Note that NTC, fuse, and the input filter inductor is replaced with shorts in the real circuits.
I am ...
2
votes
2answers
129 views
How to tell if a capacitor is still good?
I was replacing a 400 V 120 µF capacitor in a power supply (AC 120 V - 19 V DC 4.62 A).
I tested the dc out end while it was still plugged in and got 0.07 V.
As far as I can tell although being ...
1
vote
0answers
67 views
Circuit testbench nailbed: how to test the pots?
Imagine I make an analog circuit, lets say a guitar pedal circuit (in a PCB of course).
How can I test (automatically if possible) the potentiometers functionality, when testing in a nailbed ...
1
vote
1answer
265 views
How to test a MOV with no visible damage
As far as i know cumulative degradation occurs in a MOV when multiple surges appears in a circuit, A way to minimize this degradation is having multiple MOVs in parallel.
This kind of damage can be ...
3
votes
3answers
293 views
Testing a thyristor
I have a very large high voltage device that a friend asked me to take a look at. It has a bunch of BIG thyristor packages (Semikron, SKKT 106/18 E, Dual Thyristor Module, 600A 1800V).
I'm testing ...
2
votes
0answers
70 views
Testing eurorack input protection
I'm building a eurorack synth module, and I'm about to do the final tests on the design to make sure that the module cannot be destroyed (electronically, using what's available in the rack, so ...
15
votes
3answers
292 views
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 ...
1
vote
1answer
43 views
IEC 61952 Clause 11.1 Electrical Type Test
Where can I find the acceptance criteria for the Electrical Type Tests? Specifically, where is the Dry lightning impulse withstand voltage test and the Wet power-frequency test in the IEC 61952 Ed 2.0 ...
1
vote
2answers
164 views
How to test a DMX splitter
This question is related to the DMX splitter I'm building and shown in Prototyping a DMX splitter.
However, for testing a different question is appropriate.
I never really tested a hardware device, ...
3
votes
2answers
56 views
Help Shielding RF Anechoic Chamber - FM Stations
a collegue and I acquired a surplus small anechoic chamber (8 ft x 8 ft) for making some pre compliance test measurements, and we're running into the issue of FM Stations being only attenuated around ...
0
votes
1answer
55 views
How does Return/Insertion loss work for wireless devices if there’s no cable?
I understand return loss is the ratio of how much signal is reflected in a transmission line. But for wireless devices there is no cable. So how is this measured?
So is the impedance mismatch for ...
