Hobby Electronics Basics

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ipod technology

I have an idea to use ipod in industry to such a level as utilizing the ipod for maintenance instructions/reference mat...
0 comments posted 19yrs
posted by eneels01
0 comments posted 19yrs posted by eneels01

Scrolling 640 LEDs

Hello all, I am building an 8 x 80 scrolling LED sign for fun. The basic design centers around an Atmel Mega88 microcon...
22 comments posted 19yrs
posted by Mystik738
22 comments posted 19yrs posted by Mystik738

STOP WATCH NEEDS A LARGER LCD "HOW TO"

I have a stop watch that has a LCD screen witch I would like to increase the size for easier viewing. The stop watch us...
0 comments posted 19yrs
posted by piscatory
0 comments posted 19yrs posted by piscatory

Ground on AC DC Converter

I have a 5V and a 12V power supply. Both have a N, L, Ground connections for the AC side. Both also have a V- and V+ co...
4 comments posted 19yrs
posted by hufaunder
4 comments posted 19yrs posted by hufaunder

What is this red rubbery DC motor part?

(crossposted) Looking at the 1/16" x 1/4" red rubbery extrusion from the non-functional end of a DC motor. It looks lik...
6 comments posted 19yrs
posted by jdoe
6 comments posted 19yrs posted by jdoe

transformer design

I am busy designing a transformer with the following specifications: a 1:1 transformer - a planar type transformer - ma...
0 comments posted 19yrs
posted by johanwagener
0 comments posted 19yrs posted by johanwagener

Voltage Switching

Hello, I am trying to interface with a device that outputs 24V when off and switches to 0v when commanded on. The probl...
11 comments posted 19yrs
posted by robert.mcd
11 comments posted 19yrs posted by robert.mcd

Not so simple LED series resistor value?

Can sombody check my math to see if this LED resistor value is right? I have a series chain of 25 white LEDs at 3 volts...
5 comments posted 19yrs
posted by wrongaddress
5 comments posted 19yrs posted by wrongaddress

Wiring Pencil

I'm trying to purchase/locate a wiring pencil. I am unable to locate any US based companies selling these. Can anyone s...
11 comments posted 19yrs
posted by gecono
11 comments posted 19yrs posted by gecono

Need help with a Resistor calculation please

I have this question and I am wondering if someone can tell me the formula and how they derived the answer (steps) - it...
6 comments posted 19yrs
posted by netrate
6 comments posted 19yrs posted by netrate

Electrical Safety

Hello again from the dungeon... As I start to get into building line-driven power supplies and such, where should I sta...
24 comments posted 19yrs
posted by blahbleh666
24 comments posted 19yrs posted by blahbleh666

Adding external input jack (stereo to mono)

I bought a replica of an old cathedral radio (Crosley CR32) for my office. It is a radio/cassette player. I would like...
2 comments posted 19yrs
posted by crusher300
2 comments posted 19yrs posted by crusher300

Ribbon cable tester? Does such a thing exist?

Hi, I have a 50 pin ribbon cable that is carrying a large number of signals from various hardware components in a medic...
3 comments posted 19yrs
posted by jazzdman
3 comments posted 19yrs posted by jazzdman