Hobby Electronics Basics

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Ground Isolation

I have a project in the design phase that I need a bit of advice on. The project has two circuit stages both powered fr...
1 comments posted 21yrs
posted by seware
1 comments posted 21yrs posted by seware

Somewhere to learn

Im trying to make a goodbye gift for my friend. he loves playing the guitar so i figured whats better then a mini amp?...
3 comments posted 21yrs
posted by claypipkin
3 comments posted 21yrs posted by claypipkin

Good source

What would be a good book to read and or a good site to go to to learn the basics of electronics all the way up to the...
5 comments posted 21yrs
posted by JCSforindependence
5 comments posted 21yrs posted by JCSforindependence

DC female jack - which wire is which?

Hey all, this should be fairly easy. I have a 7" LCD monitor that was designed primarily for car use, it has a red (+)...
2 comments posted 21yrs
posted by barleymashers
2 comments posted 21yrs posted by barleymashers

variable electromagnet

dear all, i would like to build a variable electromagnet that is directly connected to a computer controlled (220v AC)...
7 comments posted 21yrs
posted by archi8
7 comments posted 21yrs posted by archi8

Controlling hundreds of LEDs

Hi All, I'm trying to control hundreds of LEDs from my parallel port (8 data pins - will soon be replaced with the outp...
35 comments posted 21yrs
posted by danny
35 comments posted 21yrs posted by danny

16F819 to 16F877

I would like to convert the following codes, so it works on 16F877. Before converted: 'Set up the IR HPWM modulation fr...
2 comments posted 21yrs
posted by indras
2 comments posted 21yrs posted by indras

Single Sided PCB's in Consumer-level VCR's

Recently, I had the need to fix a VCR at home (or rather, to remove a toddler-inserted food item from said VCR. :) The...
2 comments posted 21yrs
posted by ianf
2 comments posted 21yrs posted by ianf

What is the real voltage from an AC/DC adaptor ?

I have several AC/DC Adaptors. I often find that the voltage listed on the Adaptor is not the voltage that it gives out...
16 comments posted 21yrs
posted by trudeu
16 comments posted 21yrs posted by trudeu

Syncing Radio broadcast with TV Video

Anybody have a simple circut to do this? I love listening to our local radio announcers for the game while watching the...
0 comments posted 21yrs
posted by larrybud2002
0 comments posted 21yrs posted by larrybud2002

Fading LEDs

Hi Group, I'm trying to design a simple circuit that will fade a white LED in, hold it for a few seconds, then fade it...
3 comments posted 21yrs
posted by m7n
3 comments posted 21yrs posted by m7n

Batteries

OK i know that cold weather affects the lifespan of batteries but i never thought i would get batteries that actually d...
5 comments posted 21yrs
posted by apsman02
5 comments posted 21yrs posted by apsman02

led's

Hey there when placed in the sun, a small led gives off a reading on my voltmeter, goes up and down. The only thing is,...
3 comments posted 21yrs
posted by mr
3 comments posted 21yrs posted by mr