Hobby Electronics Basics

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TTL input circuit to drive diode

Hi. I need a little help with something that should be pretty basic. I have a control board that has a TTL output to tu...
5 comments posted 19yrs
posted by dontsend
5 comments posted 19yrs posted by dontsend

Power supply-2

HI, I would like to know if anybody tried these power supplies? they are very cheap, but are they any good. http://www.a...
11 comments posted 19yrs
posted by lerameur
11 comments posted 19yrs posted by lerameur

Ram Error

This is maybe not a basic question but I guess it is all relative. I am working on a arcade game board that is operated...
3 comments posted 19yrs
posted by uriahsky
3 comments posted 19yrs posted by uriahsky

Stripping Ribbon Cable

Hi guys: I've got an application where I'd like to strip the ends of a ribbon cable, insert them through holes in a PCB...
3 comments posted 19yrs
posted by eromlignod
3 comments posted 19yrs posted by eromlignod

Slide potentiometer

Hello, I just received my slide potentiometer. Although I am a bit disappointed. I have ordered 6 overall, (different l...
14 comments posted 19yrs
posted by lerameur
14 comments posted 19yrs posted by lerameur

How do I magnetize screw bits?

I want to magnetize screw bits for my screwdriver. >From what I gather I need to attach a "insulated" wire to a battery...
7 comments posted 19yrs
posted by thomas.collinsworth
7 comments posted 19yrs posted by thomas.collinsworth

RF balanced filter ciruit testing?

Hi All, I have a balanced 50 ohm 915MHz filter on a PCB that I need to test. Would it work OK if I simply shunted one l...
2 comments posted 19yrs
posted by billcalley
2 comments posted 19yrs posted by billcalley

stabilizing a comparator

I was looking at this guy's voltage regulator http://homepage.sunrise.ch/mysunrise/joerg.hau/mot/voltreg.htm T1 acts as...
2 comments posted 19yrs
posted by kellrobinson
2 comments posted 19yrs posted by kellrobinson

could somebody check this

The problem: to find the voltage at the node of R3, R4 and R5 Vs | | ,---+---, | | R1 R5 | | +--R4---+ | | R2 R3 | | '-...
2 comments posted 19yrs
posted by kellrobinson
2 comments posted 19yrs posted by kellrobinson

555 PWM

Hello all, I am an absolute beginner at electronics. I need a DC motor (probably a 1.5 to 9V hobby DC motor from radio...
3 comments posted 19yrs
posted by jjam
3 comments posted 19yrs posted by jjam

PDA Battery

Hi, I have a PalmOne Tungsten T3 and the battery is starting to go down hill. I've looked at getting other batteries as...
2 comments posted 19yrs
posted by mqiqcqhqaqeqlqhqiqmqsq
2 comments posted 19yrs posted by mqiqcqhqaqeqlqhqiqmqsq

Need way to detect laser

What can I use to detect a laser that is being pointed at a point? It can't be visual. The laser is going to be about 1...
9 comments posted 19yrs
posted by clannorm
9 comments posted 19yrs posted by clannorm

Help please with lithium battery project

Greetings All, I have bad wrists and heat helps. I have looked at those electric gloves but I really only need a heated...
13 comments posted 19yrs
posted by etpm
13 comments posted 19yrs posted by etpm