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1
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2answers
22 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
49 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
votes
2answers
203 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 ...
4
votes
3answers
62 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 ...
1
vote
3answers
118 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 ...
1
vote
4answers
170 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% ...
1
vote
1answer
53 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
26 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
55 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
votes
2answers
59 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
59 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 ...
7
votes
1answer
561 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 ...
1
vote
2answers
70 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
107 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 ...
6
votes
3answers
924 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
vote
1answer
90 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 ...
1
vote
2answers
148 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
vote
2answers
82 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 ...
0
votes
0answers
49 views

What would be some solutions to prevent system malfunction after IEC 61180 4 kV and 6 kV tests?

My team of engineers are developing an energy analyser that have to be submitted to the 6 kV transient tests of IEC 61180, Table 1 Line 8 and 4 kV fast transients tests, Table 1 Line 9. When we were ...
2
votes
1answer
93 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
votes
1answer
80 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 ...
0
votes
3answers
207 views

Is it possible to check an Ethernet twisted pair with a multimeter?

It would be useful to measure electrical parameters (such as I,U,R and perhaps L,C or other) at the end of the cable, when the other end is disconnected or connected, and analyze the physical layer of ...
0
votes
2answers
83 views

Discovering operating power of a component without destroying it and without specification

I have a laser pointer component that I figured was a 9V pointer, and it worked nicely and shone very bright. I kept decreasing the voltage to see how low it could go, and it turns out it runs great ...
3
votes
1answer
112 views

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 ...
0
votes
4answers
258 views

What will happen to a transformer if rated output voltage is injected to the secondary terminal?

I believe that I have a three phase delta to single phase transformer 1Kva with input 415 v three phase and output 230 Vac single phase. ( Someone help me to identify what kind of transformer is ...
0
votes
2answers
99 views

What are the plated holes on this PCB for?

In the top left corner of this snapshot, you can see a bonafide test point, TP12. Slightly down and to the right of TP12 you can see an exposed copper pad, also likely a test point. What I am ...
5
votes
1answer
142 views

Requirements tools for PCB design?

I'm writing requirements for our PCB designs, determining what clients want and what's possible to build. When requirements are finalized, I write tests for the same designs. Right now, I'm doing it ...
0
votes
1answer
207 views

Pogo Pins for 1.5mm Pitch Test Fixture

I'm working on a design and am going to source a smaller pcb and solder it to my design. Before using the sourced board I'm wanting to test it and so I'm trying to design a test fixture similar in ...
0
votes
1answer
110 views

Problem using Quad buffer gate (SN74HC125N)

I've ordered a couple of quad buffers (SN74HC125N) from AliExpress and they don't seem to behave. I tested it using an Arduino Uno with the following wiring: ...
0
votes
1answer
55 views

How are processors tested before going to production?

No matter how much experience an engineer has, or how many engineer works on the design of a processor or a microcontroller, we are human at the end, and it is possible to make mistakes. Before ...
1
vote
1answer
148 views

Old phone continuity tester

An old man I used to work with had a set. Two old handsets with two conductors coming from them. It had a 9v power supply, I believe. We used it to trace existing interlock wires, hundreds in one ...
1
vote
1answer
140 views

How to supply 2 different voltages to a circuit every 2 minutes

For executing a (stress) test scenario, I need to simulate the following behavior on my circuit: for 2 minutes, deliver 11V to the circuit for 2 minutes, deliver 14V to the circuit for 2 minutes, ...
1
vote
3answers
103 views

Determine break in long circuit

I have a circuit of switches like this. The switches are a long way from the supply and a long way from each other. ...
0
votes
2answers
165 views

How should I understand this twin coil relay pinout? (Screenshot)

I'm currently looking on an automotive twin coil relay. The Datasheet gives me following schematic: My Question is: How could I test this relay? In other cases I put the corresponding Voltage on ...
1
vote
1answer
52 views

Ensuring an SSR relay is dead

I recently purchased a used IEC Centra centrifuge with a refrigeration feature. Works great, except the refrigeration condenser never cycles off and as a result the chamber gets down to the minimum ...
5
votes
5answers
878 views

Embedded Applications Software Testing Life Cycle

I have no JTAG and I can not afford it for my ARM Cortex M3 Chip. I'm wondering, how professionals debug their applications ? Do you flash your uC every time, frequently, then you run and test, ...
1
vote
1answer
571 views

Problem testing an ADC with a DAC and voltage divider

I am testing a self-made ADC shield for Arduino Due based on the ADS1299, a 24-bit ADC with a 24x programmable gain amplifier. I have a signal generator sketch running on another Arduino Due that can ...
3
votes
2answers
203 views

Need of self testabilty code inside embedded firmware modules?

I have a question to ask about the self-testability code inside a firmware module. I have developed code, and it was in a shamble, and I was clueless about firmware architecture too. Later I found ...
6
votes
4answers
381 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 ...
4
votes
2answers
137 views

Design for test - What the different ways in which this is done

I know that when we are designing digital circuits we may add porition to it that helps in testing it. This may go beyond merely boundary scan test. What resource can I can use to understand this ...
2
votes
2answers
2k views

Basic Embedded Firmware testing essentials and Software Test plan [closed]

I am trying to make an embedded product, but I'm new to firmware testing and want to make sure I don't miss anything. What are the things that need to be checked for its firmware performance? Proper ...
4
votes
5answers
3k 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 ...
1
vote
3answers
182 views

What design testing can I do before fabbing a PCB?

I'm an EE graduate who enjoyed the first taste of designing and fabricating hardware. My first board was a really low speed microcontroller board using mostly DIP and through-hole components, like ...
0
votes
3answers
169 views

Looking for test leads for individual PCB header pins or socket pins

While recently debugging a device that had a 7-pin male XLR plug, I was trying to connect to two of the pins in the plug, without touching any of the others, and I wondered if there are test leads ...
1
vote
1answer
102 views

Capacitor Testing

I have some old ceramic capacitors and I wanted to test it to see whether it meets the specification in the datasheet or not. I know how to test the capacitance of it but I do not know how to test the ...
5
votes
2answers
275 views

Checking for a short in a circuit with a large capacitor?

I'm developing a small testing application for my company that tests various hardware and software functionality. I do however have a problem developing a simple way to check for short circuits in ...
3
votes
1answer
333 views

ATmega2560 not responding on hand-assembled PCBs

I've assembled some PCBs that I had made, and I'm unable to get the ATmega2560 to respond to programming via the ICSP header. On the third board I'm trying, I have soldered on only the MCU, the ICSP ...
0
votes
1answer
118 views

Embedded software app testing

The software app being developed runs on the embedded hardware and spits the debug output through a serial port during various functionality of the app. Following are the questions. Can I use the ...
11
votes
3answers
453 views

How to add a controlled amount of jitter to a signal

Background I am developing a digital clock and data recovery circuit and am now getting into the evaluation phase, focusing on testing the limits of the design and finding potential strengths and ...
0
votes
2answers
2k views

How to do a loopback test of a parallel port?

I have connected pin 2 to pin 3, pin 4 to pin 5, and pin 6 to pin 20. Can someone please tell me if this is the correct wiring for loopback testing a parallel port? Ia am using BurnInTest 7.1 Pro by ...