Hobby Electronics Basics

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Transformer Wire Current Capacity

I was musing about my MOT, with 143 turns of either skinny #18 or fat #19 http://www.abiengr.com/~sysop/images/MOT-prim...
19 comments posted 20yrs
posted by richgrise
19 comments posted 20yrs posted by richgrise

Doonesbury comic strip -- on topic!

"So what'd you think of MIT, Alex?" "Wasn't too impressed. I stumped two instructors with a question.. And it was simpl...
31 comments posted 20yrs
posted by kellrobinson
31 comments posted 20yrs posted by kellrobinson

Shut it down or let it run?

I just recieved an Hitachi CP-s230 LCD projector to use in my classroom. I use it all day but there are periods during...
2 comments posted 20yrs
posted by 0.jim.meyer.0
2 comments posted 20yrs posted by 0.jim.meyer.0

Capacitor help

What is the value of capacitor .01J 100HT what is this convention all about. Jannie
3 comments posted 20yrs
posted by me
3 comments posted 20yrs posted by me

PIC PWM registers

Hi, I wrote a PWM calculator and code generator : http://www.micro-examples.com/public/microex-navig/doc/097-pwm-calcul...
9 comments posted 20yrs
posted by noreply
9 comments posted 20yrs posted by noreply

mobile communication

How can jam the mobile frequency in particular area give me idea thanks
3 comments posted 20yrs
posted by zalmeh92
3 comments posted 20yrs posted by zalmeh92

Any good Cell Phone Jammer Schematics

Are there an good cell phone jammer schematics here on the web? Or can anyone recommend any books on the subject? Thanks...
117 comments posted 20yrs
posted by mitchell_leary
117 comments posted 20yrs posted by mitchell_leary

question about parallel dc powersources

I am in an industrial electrical course and we got a question posed to us with parallel dc power sources. I know that i...
7 comments posted 20yrs
posted by roblarss
7 comments posted 20yrs posted by roblarss

Generating a High Voltage Pulse

Hi everyone, I'm new here. My name is Brick and I'm taking my first electronics course right now. My teacher recommende...
11 comments posted 20yrs
posted by brickwalden
11 comments posted 20yrs posted by brickwalden

MULTIPLE LED HELP!

Hello! I'm wiring 99 LEDs together and want to power it by battery.... I have a very basic knowledge of circuitry and w...
13 comments posted 20yrs
posted by alex_bec
13 comments posted 20yrs posted by alex_bec

Stopping the clock on a 68000 system

I have this in-circuit IC tester that requires that I stop the clock by removing the cpu which I can't do because it is...
2 comments posted 20yrs
posted by uriahsky
2 comments posted 20yrs posted by uriahsky

Sus(Silicon unilateral switch) VS scr or thirystor

Hi, a SUS can repalced by a thirystor? I've to buy several 2n4988(for old euipment) but are very exensive...........so i...
1 comments posted 20yrs
posted by maxitubo
1 comments posted 20yrs posted by maxitubo

HELP: headphone/TV RCA connection

I have a pair of normal (unpowered) stereo headphones that I would like to connect to my rear projection TV without usi...
10 comments posted 20yrs
posted by gjanusz8
10 comments posted 20yrs posted by gjanusz8

Can anyone clarify a schematic question for me?

Hello, I am trying to build a headphone amplifier. I am confused about something. My project schematic (http://headwize...
4 comments posted 20yrs
posted by prometx42
4 comments posted 20yrs posted by prometx42