Hobby Electronics Basics

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Hz overload

Since the 9v battery supply is quickly used up, I am using a ac battery eliminator/wall wart to run the Led timer. Alth...
6 comments posted 18yrs
posted by kvsteve
6 comments posted 18yrs posted by kvsteve

Vacuum Tube 6EJ7 Test

Hello again. I'm still working on my tube testing project. I have been trying to determine the transconductance of the...
4 comments posted 18yrs
posted by lisdon
4 comments posted 18yrs posted by lisdon

How this circuit works?

Hello I have the following questions, can anyone explain to me how the following circuit works, how does the first op-a...
15 comments posted 18yrs
posted by use
15 comments posted 18yrs posted by use

amplifiers

the output of an amplifier is a square wave when the input is a sine wave.what is the explanation for this?
6 comments posted 18yrs
posted by upasna.shukla
6 comments posted 18yrs posted by upasna.shukla

boost circuit

Hi, I have a question concerning a boost circuit Vs a dc motor. here is a link to a boost circuit: www.intersil.com/eng...
2 comments posted 18yrs
posted by lilipot
2 comments posted 18yrs posted by lilipot

LRC omplex Numbers (Try #2)

When I used cut and paste from a word processor on the first post, I ddin't realize that some of the information didn't...
12 comments posted 18yrs
posted by jalbers
12 comments posted 18yrs posted by jalbers

Questions about battery leak

I have a handheld video game that takes 4 alkaline size C batteries, and I had left it in a corner 5 years ago and forg...
3 comments posted 18yrs
posted by void.no.spam.com
3 comments posted 18yrs posted by void.no.spam.com

Is Rigol Good ?

Hello, Somebody recommended a Rigol mixed signal oscilloscope. I checked the Rigol website. Do you know anything about...
7 comments posted 18yrs
posted by titani
7 comments posted 18yrs posted by titani

which PC Based Logic Analyzer ?

Hello, At work we have an Intronix Logicport PC based logic analyzer. It is good, I like using it, but it has very littl...
4 comments posted 18yrs
posted by titani
4 comments posted 18yrs posted by titani

Making an EMF Detector

Hey everyone. I am in the final stages of making my EMF Detector but the schematic shows a 1mH inductor/probe for the d...
1 comments posted 18yrs
posted by gavin.abbott
1 comments posted 18yrs posted by gavin.abbott

speaker interference creation

Hi there, I've noticed that my GSM phone creates a noise through my speakers sometimes (ie when the phone is communicat...
3 comments posted 18yrs
posted by lcowell
3 comments posted 18yrs posted by lcowell

suggest LED + transistor for PC?

I wanted to change the indicator LED a bit. First off, the HD indicator LED is uselessly dim because of a cheap optic g...
1 comments posted 18yrs
posted by impmon
1 comments posted 18yrs posted by impmon

tiny inductor with every bypass cap?

Hello, I was looking at the schematics for a DSP-based board, running at 100 MHz. They have a tiny inductor with every...
53 comments posted 18yrs
posted by titani
53 comments posted 18yrs posted by titani

op-amp nV input offset voltage

Hi, As you know, the *input* offset voltage is the voltage required across the op-amp's input terminals to drive the ou...
1 comments posted 18yrs
posted by energymover
1 comments posted 18yrs posted by energymover

The Right PCB House

Hello, I need to have a 4-layer board made, a prototype, 2 boards, nothing fancy. I did some research in this newsgroup...
44 comments posted 18yrs
posted by titani
44 comments posted 18yrs posted by titani