Hobby Electronics Basics

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electronic detection of earthquakes

Hi all I happened to find the following book at Amazon, and had a question about it: Ionospheric Precursors of Earthqua...
27 comments posted 17yrs
posted by santa
27 comments posted 17yrs posted by santa

Help identify a power connector (socket)

I'm trying to find the name/part # for for a smaller power plug/ socket. They appear to be used mostly for LED power co...
3 comments posted 17yrs
posted by will_stock
3 comments posted 17yrs posted by will_stock

My Dynamotor

I have a Delco Remy dynamotor. It was made for tanks. Was new in 1972. There are two sets of pairs of brushes at both e...
4 comments posted 17yrs
posted by notty
4 comments posted 17yrs posted by notty

Dynamic link library problems

Hi there, Can you help me fix two issues that pop up when I boot? 1st wWZCSLDR2.exe Entry Point Not Found Entry point a...
4 comments posted 17yrs
posted by californiamoods
4 comments posted 17yrs posted by californiamoods

FET circuitry

Hi, I have a project where I need to cycle the power on a 2.5=94 HDD, The power cycle is controlled by a micro. The dri...
3 comments posted 17yrs
posted by David.Colq
3 comments posted 17yrs posted by David.Colq

Reflection Coefficient Tutorial

Hi, I have created a tutorial that helps you to understand transmission lines, the reflection coefficient and VSWR. It...
0 comments posted 17yrs
posted by bulegoge
0 comments posted 17yrs posted by bulegoge

shielding/grounding question

Hey all; When a circuit is built inside a metal box to prevent hum pickup (in audio), does the metal box need to be con...
7 comments posted 17yrs
posted by toccata
7 comments posted 17yrs posted by toccata

unfamiliar symbol

I had a couple of things I wanted to figure out about the SG3525 and got to looking at the schematics for the oscillato...
5 comments posted 17yrs
posted by nospam
5 comments posted 17yrs posted by nospam

Relay Toggle Circuit Using a 556 Timer

I'm using your Bill Bowden's "Relay Toggle Circuit Using a 556 Timer" to control an effects loop switcher for my guitar...
1 comments posted 17yrs
posted by boorsma.brian
1 comments posted 17yrs posted by boorsma.brian

Measuring Peak Current with a Fluke 87 III

Just recently I was using a Fluke 87 III to measure the peak current in an AC circuit. It was pointed out that I should...
5 comments posted 17yrs
posted by alanfredperry
5 comments posted 17yrs posted by alanfredperry

OT: googlegroups Crosspost check

Just checking - some googler was multi-posting, I want to show him how simple it is to crosspost. All you have to do is...
1 comments posted 17yrs
posted by richardgrise
1 comments posted 17yrs posted by richardgrise

8 Bit Random Numbers

I located a program to generate 255 pseudo-random numbers in some fixed sequence which repeats after 255 counts. 4 bits...
62 comments posted 17yrs
posted by wrongaddress
62 comments posted 17yrs posted by wrongaddress

Help with Electric Motor

Hi, I'm in the UK and need some help & pointers on a motor replacement. I have my mother-in-laws roller shutter garage...
10 comments posted 17yrs
posted by MrRonMan
10 comments posted 17yrs posted by MrRonMan