Hobby Electronics Basics

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Bulb dimmer circuit

Suppose I have a TTL IC which has two outputs. I want to drive a small bulb with a transistor (example NPN BFY51) via a...
1 comments posted 22yrs
posted by grahame9
1 comments posted 22yrs posted by grahame9

Marconi 2019 second degree protection code?

I'm repairing a Marconi 2019 Signal Generator and I want to re-calibrate the thing. For this I need the code to overcom...
1 comments posted 22yrs
posted by a.mil
1 comments posted 22yrs posted by a.mil

Inviting Entries to Electronic Design Contest

Objective: The purpose of the Electronic Design Contest is to promote excellence in the design of electronic systems an...
1 comments posted 22yrs
posted by beninomaha
1 comments posted 22yrs posted by beninomaha

Very basic transistor usage

First off, please excuse my ignorance as I know very little about this stuff and searching google has only helped to co...
4 comments posted 22yrs
posted by pcjason*SPAMTHIS*
4 comments posted 22yrs posted by pcjason*SPAMTHIS*

Taking the 'hummm' out of a circuit

Im working on a power supply for some musical bits. Unfortunately its producing a great deal of "hum" in the circuit. I...
21 comments posted 22yrs
posted by anonymous
21 comments posted 22yrs posted by anonymous

voltage regulators - in parallel?

can multiple voltage regulators be run in parallel? Each terminating in a separate output? IE - the inputs are tied tog...
8 comments posted 22yrs
posted by anonymous
8 comments posted 22yrs posted by anonymous

dc motor power supply question (newbie)

Hello all. Hopefully a simple one here. My son has a power wheels quad racer. I've found new motors for it. I've also j...
0 comments posted 22yrs
posted by grimmsoncnc
0 comments posted 22yrs posted by grimmsoncnc

Question about reversed-polarity in an AC outlet

Someone I know had recently purchased a piece of computer equipment (a flatbed scanner, I think) and discovered that it...
61 comments posted 22yrs
posted by wylbur37nospam
61 comments posted 22yrs posted by wylbur37nospam

Tachometer Input

I have a device which requires a signal for a tachometer. We have this device in the training room for showing / teachi...
8 comments posted 22yrs
posted by rwskinnerATawesomenetDotnet
8 comments posted 22yrs posted by rwskinnerATawesomenetDotnet

Should I buy breadboard with power supply?

Should I buy a breadboard with a 5 volt regulated power supply or get a regular breadboard without one? Thank you.
7 comments posted 22yrs
posted by john_20_28_2000
7 comments posted 22yrs posted by john_20_28_2000

CONVERT RCA to COAXIAL

|--------------------------| audio _____ | ?????????? |______coaxial video _____| black box | |------------------------...
2 comments posted 22yrs
posted by apuntenfuego
2 comments posted 22yrs posted by apuntenfuego

proto board #203

Anybody have any manuals/tips for this prototype board?: http://rangermike.jeph.net/protoboard.jpg It appears to have:...
2 comments posted 22yrs
posted by no_spam
2 comments posted 22yrs posted by no_spam

A Very Basic NMOS question

Hello All, I am a computer science person. I am learning Analog VLSI. I have a basic question about MOSFETS. For instan...
1 comments posted 22yrs
posted by saranyan13
1 comments posted 22yrs posted by saranyan13

Working of BJT & FET Transistors ?

is there any good website for learning fundamentals of trasistors, mainly: dc biasing techniques, reading data sheets a...
2 comments posted 22yrs
posted by mail2gugly
2 comments posted 22yrs posted by mail2gugly

Wanted: Simple Light Detector Circuit

I need a sensitive light detector that i can place in front of the eyepiece of a binocular. This detector should sound...
3 comments posted 22yrs
posted by puns
3 comments posted 22yrs posted by puns