Hobby Electronics Basics

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Scope crt question

I just picked up an old kenwood cs-5135, when displaying i got a ghosted line, what is this from? http://chrispol.ath.cx...
3 comments posted 21yrs
posted by chrispol
3 comments posted 21yrs posted by chrispol

Learning to use PICS

I'm interested in learning how to use PICS. I've done lots of advanced stuff with the Basic Stamps, but am starting to...
41 comments posted 21yrs
posted by dave.harper
41 comments posted 21yrs posted by dave.harper

Inductor/Resistor/Capacitor Equivalency

Hello, I'm a Chemical Engineer that took an "Electrical Engineering for Non-Electrical Engineers" class as part of my d...
3 comments posted 21yrs
posted by chickenkungpao
3 comments posted 21yrs posted by chickenkungpao

hi fi cable colours

I am connecting my pc to my amp. The chap in the hi fi shop sold me a couple of cables (mini jack to two phono). The tw...
2 comments posted 21yrs
posted by not_here.5.species8350
2 comments posted 21yrs posted by not_here.5.species8350

Test me!

Hi eveyrone, I'm not at all sure that electronics is for me. If I'm wasting my time I need to know now, before I waste...
5 comments posted 21yrs
posted by smevans
5 comments posted 21yrs posted by smevans

rf transformers?

I'm trying to build some demonstration circuits (old fm detectors) and I'm having a lot of problems finding someone who...
2 comments posted 21yrs
posted by road12fg
2 comments posted 21yrs posted by road12fg

IR Transmitter

I am a complete beginner. I just bought the Proton Dev Board MKII plus LCD (http://www.picbasic.org/proton_dev.php). I...
4 comments posted 21yrs
posted by indras
4 comments posted 21yrs posted by indras

Metal Case Safety

Hey Everyone If a transformer is used in a design is it safer to enclose it in a metal box or a plastic box? Most lab e...
2 comments posted 21yrs
posted by fred
2 comments posted 21yrs posted by fred

How can I make OLED?

I begin study OLED. Please suggest me.
1 comments posted 21yrs
posted by papae60
1 comments posted 21yrs posted by papae60

Bit representation on a CD

Hello, This question has some connections with the other one that I recently posted. When data is stored on a CD, a str...
0 comments posted 21yrs
posted by "c.j[dot]w"
0 comments posted 21yrs posted by "c.j[dot]w"

POP problems when preamp is turned on

Hey all; I've built a mic preamp that has one xformer for the opamp (+/-15v), and another for phantom power (+48v). Whe...
6 comments posted 21yrs
posted by toccata
6 comments posted 21yrs posted by toccata

Voltage Doubler

I have a design for which I need to generate a high DC voltage (more than 400V). My power source for this voltage is th...
8 comments posted 21yrs
posted by jay
8 comments posted 21yrs posted by jay

battery capacity calculations metal nickle halide

really confused about this rating i am using a 3,500 mah c cell to powe a 20 ma led how may days ( about--i understand...
6 comments posted 21yrs
posted by plener
6 comments posted 21yrs posted by plener