Hobby Electronics Basics

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Identifying a wire

OK I'm putting an old radio in a new truck and the wiring harness had to be slightly different. Bottom line: I've got a...
5 comments posted 18yrs
posted by steamer
5 comments posted 18yrs posted by steamer

battery meter

how can i make a battery meter of a bettery which is to be charged by solar pannel to show reading on LEDs at alltimes,...
6 comments posted 18yrs
posted by aqe911
6 comments posted 18yrs posted by aqe911

maintaining 12 V

hi. well i have to implement an intelligent lighting system. after detecting the person from PIR sensors, light has to...
2 comments posted 18yrs
posted by aqe911
2 comments posted 18yrs posted by aqe911

potentiometer output to on/off switch

I would like to convert some output (ohm resistance?) from a potentiometer to an on/off switch. My electronics experien...
6 comments posted 18yrs
posted by lizardbones
6 comments posted 18yrs posted by lizardbones

ISD 4003 recording chip question

Hi, Anyone with experience in the voice chip ISD4003. I saw a few post here about it. I wanted to know how the memory i...
0 comments posted 18yrs
posted by lerameur
0 comments posted 18yrs posted by lerameur

on/off circuit

I require a circuit that switches off. It is similar to the pocket calculator that will automatically switch off if not...
12 comments posted 18yrs
posted by kvsteve
12 comments posted 18yrs posted by kvsteve

Coputer to Lab power supply conversion

Hey everybody. I am a hobbyist in the field of electronics with no formal training. I have a pretty good understanding...
9 comments posted 18yrs
posted by ngdbud
9 comments posted 18yrs posted by ngdbud

Can portable jump starter supply mobile power?

Left over from my boating days is a 300amp portable jump starter (www. 4earlybirds.com/jump charger.jpg) Both a laptop...
2 comments posted 18yrs
posted by pixsnap
2 comments posted 18yrs posted by pixsnap

Spicy Network of NanoScience

Spicy network of NanoScience, Nanopaprika.eu - The International NanoScience Community started life in November 2007 an...
0 comments posted 18yrs
posted by nanoscience81
0 comments posted 18yrs posted by nanoscience81

Is this safe to use in outdoor ?

I noticed Electroluminescent Vinyls paste out side the taxi door for advertisment without any protection, I remenber th...
7 comments posted 18yrs
posted by mowhoong
7 comments posted 18yrs posted by mowhoong

Crystal Radio Amplifier

This may be a stupid question, but I'm about to build a crystal radio (http://www.bobsdata.com/crystal_radio/index.html...
7 comments posted 18yrs
posted by the1930s
7 comments posted 18yrs posted by the1930s

solar based lighting system

hay watsup , i m in need of little help i have a project of solar based lighting system , motin sensors are also incarp...
4 comments posted 18yrs
posted by x_onix2000
4 comments posted 18yrs posted by x_onix2000

Unstable LM92 question

Hi all, I've been experimenting a while with an LM92 temperature sensor: http://cache.national.com/ds/LM/LM92.pdf And I...
5 comments posted 18yrs
posted by jurgen.//NO//SPAM//priem
5 comments posted 18yrs posted by jurgen.//NO//SPAM//priem

Looking to filter the noise on a Sharp IR sensor

I just hooked up a Sharp GP2D12 IR range sensor to a scope and saw that the output is very noisy. The sensor updates at...
6 comments posted 18yrs
posted by kasterborus
6 comments posted 18yrs posted by kasterborus

Regenerative Radios

I've been looking for a transistor regen schematic, finally found one, but it doesn't give the coil specs. I want to re...
12 comments posted 18yrs
posted by the1930s
12 comments posted 18yrs posted by the1930s