Hobby Electronics Basics

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Turn on Dynamic Range Compression

I am trying to turn on Dynamic Range Compression or D.COMP as Denon calls it. I got up to and finished step 5. But inst...
3 comments posted 6yrs
posted by scientist77017
3 comments posted 6yrs posted by scientist77017

Subwoofer help

I would like to add a sub-woofer to my home theater system. My system calls for speakers in the 6 -> 16 ohm range. When...
5 comments posted 6yrs
posted by scientist77017
5 comments posted 6yrs posted by scientist77017

Power in use indicator please ?

I have a water pump in a remote location. Sometimes the pump (120 volts) li ne springs a leak and then runs all the tim...
50 comments posted 6yrs
posted by stevwolf58
50 comments posted 6yrs posted by stevwolf58

Diagnosing speakers

I have a 6 speaker home theater system. However the middle 2 speakers have no sound. I checked the voltages. 0 volts wh...
16 comments posted 6yrs
posted by andrewkennedy775
16 comments posted 6yrs posted by andrewkennedy775

Checking capacitors

Today I received one of the roughly $ 20 component testers. Checking it out and comparing capacitors I notices a big di...
8 comments posted 6yrs
posted by rmowery28146
8 comments posted 6yrs posted by rmowery28146

Solar Charging Night Light not working

Hi all, I am trying to implement a very simple solar charged night garden light. Schematics is here: https://www.jameco...
24 comments posted 6yrs
posted by alberto.m.scattolo
24 comments posted 6yrs posted by alberto.m.scattolo

Flux density

Reviewing stuff I forgot during lockdown, this is one thing I never got. H is amp-turns/meter, and having distance in t...
8 comments posted 6yrs
posted by fizzbintuesday
8 comments posted 6yrs posted by fizzbintuesday

Small generator over-voltage

If there's a better site/forum for this question, please let me know. I have an old (mid 80's) Sears Craftsman generato...
15 comments posted 6yrs
posted by BobEngelhardt
15 comments posted 6yrs posted by BobEngelhardt

Power supply current?

I wish to buy a power supply delivering up to 500V for experiments with thermionic valves. What would be a suitable curr...
24 comments posted 6yrs
posted by peterxpercival
24 comments posted 6yrs posted by peterxpercival

Transistor testing

I have some BC547 transistors which I want to use in a circuit, but according to this: Hook the positive lead from the...
15 comments posted 6yrs
posted by rob
15 comments posted 6yrs posted by rob

Wireless phone charger

Just for fun I thought I would make a wireless phone charger. I'm not reall y going to use it but I wanted to build it...
5 comments posted 6yrs
posted by stevwolf58
5 comments posted 6yrs posted by stevwolf58

Does a parrot's foot conduct electricity?

My pet parrot has a habit of chewing wires but never got a shock. I tested her feet with a multimeter and it was over 20...
63 comments posted 6yrs
posted by CFKinsey
63 comments posted 6yrs posted by CFKinsey

555 pin3 output

I've been trying out a couple of Automatic Fence Lighting circuits with a 444, 741 and ldr. I posted earlier about the...
4 comments posted 6yrs
posted by rob
4 comments posted 6yrs posted by rob