Questions tagged [test]
A definitive procedure that produces a test result.
206
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Why is my XNOR output always low?
I recently bought some Texas Instruments TTL chips. So far they've been OK, except the XNOR (SN74HC266N) chips (I've tried 3, including one that's never been in my "real" circuit) always output low ...
- 289
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How to find a faulty bulb in a Christmas lights string
I have a LED Christmas lights string, which consists of two circuits of LEDs connected serially. It is working directly on 110V AC. Most LED sockets have 2 wires connected to them, some have three. ...
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answer
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How do I test a circuit without an oscilloscope?
Just what the title says; I'm playing with simple beginner circuits, signal amplifiers and stuff. Without fancy laboratory equipment such as an oscilloscope, how should I test the output signal is ...
- 3,011
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Testing an 8-ohm speaker
I have been trying to test an 8Ω speaker, but I am having some difficulties. I have tried to test the circuit using multisim using the circuit below:
I used the 8Ω resistor in the place ...
- 781
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What unit test framework can I use for a c based mcu project?
I'm thinking about how I can use unit tests in my mcu project,
and what frameworks I can use to simplify it.
Today I am using a stm32 with OpenOCD-jtag from a Linux pc,
where it is all controlled ...
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How to non-destructively test unknown LED strip?
I have a tiny LED strip that I took out of a smashed LCD in my Digital camera. I remember lighting up the strip in the past but can't remember how.
I have been trying now with my bench supply to ...
- 228
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What Would I Need Electrical Wire Testing Hooks For?
I want to buy accessories for soldering but was curious about electrical wire testing hooks:
What are they for? For picking hard to access little wires? How do i work with them?
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How to produce a highly accurate phase or frequency shift at 500 MHz?
I currently have a couple of function generators that can be tied together in order to produce an arbitrary frequency or phase shift up to 20 MHz. Essentially I could say I want FN Generator 1 to be ...
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How to test TS7805 regulator if it is working?
I have a TS7805 voltage regulator that was placed on a pcb, laying around for 2 yeras. Is there a fast way to see if it is still working? I have a multimeter and some resistors at home and an DC 5-12V ...
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Cheap simple way to make an adjustable 1-10 MHz square or sine wave oscillator
For a test of a filter and video transmitter gear, I need a variable frequency (potentiometer adjusted) sine or square wave oscillator, adjustable from about 1 to 10 MHz. Output about 1Vp-p okay, but ...
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Methods to test/debug I2C protocols? [closed]
I've been working on some digital designs with I2C command & control and need a PC-based tool to test my interfaces. -- In the past, I've used iPorts (MCC) to do these tasks but the price tag of ...