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Questions tagged [testing]

The tag has no usage guidance.

0
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1answer
2k views

How to check pin outs for FBT

I bought a flyback transformer recently, 5908-05008, CF68A. However, when I try searching online for this model, there seems to be no pin out diagram or any information at all. Most of the FBT I saw ...
21
votes
14answers
4k views

What can I put a kilowatt into? (Or: help me save my hairdryers)

TL;DR: I need something to discharge roughly 160A at 14V into, or 2.24 kilowatts. Any comments, or answers, with either a) something I can dump a kilowatt into, b) some way I can modify a common item ...
1
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0answers
111 views

test 0.5A inductive load through switch circuit

We are a switch component manufacturer and typically run life cycle tests with resistive loads through our switch circuits. Can someone recommend a circuit diagram set up to test an inductive load ...
0
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3answers
5k views

Testing VOH, VOL, VIH, VIL

How would someone test Vih, Vil of an input pin (Or VoH, VoL of output pin) of a SoC. With an inverter, you could easily see the results but with a microcontroller/SoC, it seems difficult without the ...
0
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1answer
526 views

Testing a reference voltage of a ECU

I have test a condition when reference voltage(5V) from an ECU is not there. The ECU uses the supply voltage and internally generates the reference voltage using voltage regulator. The reference ...
1
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1answer
111 views

How do I setup a go/not LED switch?

I am designing a simple circuit that will light a LED when a given resistance is between 0 and about 1K. At about 1k the LED would not be lit at all. The test circuit should not have more than .5ma ...
10
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1answer
191 views

What happened to all of the Dynamic Signal Analyzers?

Decades back there were at least half a dozen instrumentation companies offering Dynamic Signal Analyzers (DSA's). Not Spectrum Analyzers, but rather Dynamic Signal Analyzers. The main differences ...
1
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1answer
106 views

Rest time for testing lipo cells

My university's student electric racing team has to test a large number (250) of lipo cells before using them in our electric car. Our testing methodology will be approximately like this: Discharge. ...
1
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2answers
143 views

Nomenclature for tested PCB assemblies

I want to unambiguously refer to an assembled PCB that has been tested. I am familiar with the terms: PCB - unpopulated printed circuit board PCBA - PCB assembly, a PCB with all the parts fitted and ...
0
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1answer
52 views

Protecting Test Equipment During an ESD Test

I am planning to run an ESD test on a product running traffic to some test equipment over gigabit ethernet and some other signaling interfaces (RS-232, USB, etc.) How do I decouple the ESD spikes from ...
1
vote
1answer
76 views

mA output testing/validation

I need to validate the 200 mA @ 24 VAC claim on a Transformer/Power Supply. I have some resistors but I don't know how to proceed. Help anyone?
18
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4answers
1k views

Electronics System Standards Compliance: Certification, Testing & Verification

Please note: this question has to do with the technical compliance aspects of the consumer electronics indsutry, and as such, I believe is within scope for this site. This question is about compliance,...
1
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0answers
1k views

How to test plastic for ESD properties?

I'd like to make myself a cheap soldering / inspection station by taking an acetal plastic slab and mounting a linear rail to it for attaching a USB microscope. However, I want to first ensure that ...
-1
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2answers
472 views

Test car phone charger amperage [closed]

I have at car usb charger. It has 2 ports and is rated 2.1A when one port is used and 1A when both ports are used. I attached samsung tablet (N8000) witch requires 2A output. So, tablet isn't ...
5
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5answers
1k views

How to test SMD bluetooth modules without soldering them to a board [duplicate]

I have made a costum PCB with components and a WT51822-S2 bluetooth module. After testing, there seems to be a low percentage of modules that have a fault in them. Since they are SMD modules, with ...
0
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2answers
181 views

measuring a bad motor and large current spikes in a brush motor [closed]

I am new to this forum, I am an EIT and I have been tasked to implement a fixture to measure high current spikes on brush motors when loaded and unloaded. I am at a loss here as I have never ...
0
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1answer
101 views

How do I keep a square wave output voltage high for a TTL application?

I am passing an AC signal (24 Vrms at 1K Hz) down a line through a diode of unknown bias. Due to uncontrollable variables in the environment, there are 4 possible outcomes: Positively Rectified -> ...
7
votes
2answers
3k views

How to measure the impedance of PCB trace

I am working on some front end electronics design working at 200MHz to 1 GHz for my MS project. I have designed the circuit and PCB. Trace width were calculated by simulations. After I given this to ...
2
votes
4answers
701 views

How can I test a wire for small holes?

I have stripped one wire, the black/hot/positive one, for a 120v appliance. I had to cut away the outer plastic that surrouneds all three wires, and now I'm afraid I may have nicked a small hole into ...
0
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1answer
105 views

What is the best way to safely verify the state of a digital pin on a live circuit by external means?

A typical digital pin of a microcontroller usually has 4 possible states: output, logical 0 output, logical 1 input, tri-state (high impedance) input, internal pull-up resistor On a live circuit, ...
0
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0answers
663 views

How can I connect two design units in modelsim simulation

Motivation: When I build a hardware component that consist of many sub components, then I need to test the sub components before I connect them all up and make a thorough testbench in VHDL. In some ...
3
votes
3answers
583 views

Can probing an EEPROM with a multimeter corrupt the data?

Say there's an EEPROM on a board and you happen to try probing the pin one by one with a multimeter, is there a good chance that the sequence of probing the pins must have overwritten (thus corrupt) ...
1
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3answers
164 views

Why the stable supply voltage present a ripple after connecting it to the testing board?

I used a power supply to supply 1.8V as the Vdd of the tested-circuit, after I connected 1.8V to the Vdd pad of the testing-board, the originally "clean" 1.8V began to have a ripple (the total current ...
8
votes
1answer
301 views

Is it possible to test a lithium ion battery for safety? How?

There have been stories in the news recently about fires that are believed to be caused by the lithium-ion batteries inside hoverboards. If you had one of these devices and didn't mind taking the ...
1
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1answer
39 views

Which instrument for arbitrary signal commutation (matrix)

I would like to test a bunch of sensors. Each sensor has a DB15 connector with mixed digital and analog signals (bw ~5MHz, Z ~120R). I am looking for an instrument where I can control which couple ...
1
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3answers
116 views

Testing Long Time Delay

I have implemented a long time delay using a small microcontroller (MSP430) however I need to test and verify that it does as I expect. My algorithm is as follows: ...
1
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1answer
402 views

Finding transformer paramters

When finding parameters of a transformer, can you perform the OC test and the SC test on the same side? Or is it necessary to perform them on separate sides? I am aware that by convention in the real ...
0
votes
1answer
180 views

Misbehaving logic gates

I made a prototype to test a few logic gates and found out that 1) My AND gate (7408) Works like an OR Gate. 2) My OR Gate (7432) is always on 3) My XOR Gate (7486) is always off 4) My NOT Gate (...
1
vote
1answer
2k views

Testing Capacitors - Differing Results Each Time One Is Tested?

I have a bust LCD TV - I've already ordered a replacement but am interested in using the broken TV to learn a little more about how these are put together and if I'm lucky fix it to have as a spare. ...
1
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1answer
229 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
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2answers
4k views

VHDL testbench variable clock/wave generation

A testbench for one sub-entity in my system currently defines a helper process to generate a clock-like waveform at the command of the main stimulus process. A simplified version of it is: ...
-1
votes
1answer
73 views

What tests, if any, can I execute to determine whether a PV panel has deteriorated?

So I'm possessed of an aged Photo-voltaic panel (around 15years) that came with a night-lamp. When placed in the sun here (21.17, 79.09) - on a sunny day the multimeter shows me as much as 11V from ...
2
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2answers
329 views

Of what real, practical use is electronics certification?

I am brand new to EE/ECE and am aware that companies such as UL offer a gammit of services such as: Circuit verification (they verify your schematic does what its supposed to do and doesn't have any ...
5
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3answers
273 views

Testing paradigms for consumer electronics [closed]

I am brand new to EE/ECE (my background is software) and I am curious about how real-world electronics testing takes place. In software, there are many different types of tests that a piece of code ...
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
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4answers
231 views

How to test analog component before mounting?

I have been in a small factory today, they produced 4 kind of PCBs that all are simple analog boards, each month they produce 1000 of them. The problem is that till now, after mounting them almost 10% ...
2
votes
1answer
185 views

What kind of testing equipment is used for UPS (>15 kVA)?

I work at IT division of a bank. Currently we need to order some Double Conversion True Online UPS ( Uninterruptible Power Supply) systems for our our new data center. The required ratings for UPS are ...
2
votes
1answer
152 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 ...
3
votes
2answers
171 views

Best practice for probing capacitance sensitive test point in a switching supply?

I need to probe the hot side of a switching supply between the drive transistor and inductor (Marked TP on diagram). I tie my scope ground to the device ground with short fat wire and when probing ...
0
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2answers
155 views

PCB testing register software [closed]

Good day all, This is my first question on the electronics board, and I have checked for similar queries, but so far no luck. It is possible that I'm searching for the wrong terms, so I will ...
0
votes
1answer
272 views

Testing an Analog Front End prior to installing a Sensor

I've designed a circuit around the TI LMP91000, a configurable Analog Front End (amperometric potentiostat, for use with electro-chemical gas sensors). In addition the circuit includes a 2.5V ...
8
votes
1answer
669 views

Are there any standard testing methods for bare metal code

I want to know if bare metal code, especially things like device/peripheral initialization code has any testing methods since there is little to nothing that can go wrong when writing to registers (...
2
votes
2answers
285 views

Computer Power Supply Testing Safety

I have a 750 watt ATX power supply that I will be testing with a multimeter to make sure the right voltages are present. How can I make sure that I do this safely? Is there anything that's threatening ...
0
votes
1answer
474 views

Test 220V 50 Hz signal using oscilloscope [duplicate]

Can I test a direct electric signal wave AC 220V 50 HZ using an oscilloscope in safe mode and the schema for this testing. The description in my oscilloscope say that the input AC pk and DC is Max ...
7
votes
3answers
994 views

First checks after oscilloscope unboxing

You bought your first entry level oscilloscope (e.g. Rigol DS1004Z series, 4 Channels, 50-100MHz, 1Gs/s) and while it is slowly warming up to room temperature you are wondering if the unit you have is ...
1
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2answers
705 views

Hardware test of FPGA, thousands of combinations?

My colleagues longtime ago have designed an FPGA (using VHDL) for a special purpose. Another colleague prepared the test scenarios. Now they want me to test this FPGA board following these written ...
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2answers
1k views

What Language should I use for automated testing? [closed]

I'm the Lab Manager for a small company in the RF industry and I've recently been asked by our engineer to find a more "up-to-date" programming option for automating my bench testing/calibration ...
1
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2answers
732 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 ...
2
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1answer
491 views

Testing 4kv supply

I need to test if the trigger coil on my strobe circuit is working or not. But it has a 4kV output. How do I test such high voltages?
0
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1answer
700 views

Testing hall effect sensor of a motor [Beginer question]

I would like to test the hall effect sensor of a motor (DC brushless Papst dual coil) I have for a small project of mine. I have found a bit of information online, but I cannot seem to figure out what ...