Hobby Electronics Basics

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Conductive Rubber

Have anybody heard of conductive rubber? It changes its resistance when you stretch or push on it. Anibody knows where I...
3 comments posted 21yrs
posted by brigatti
3 comments posted 21yrs posted by brigatti

how to control LED array? (follow-up)

Hi - this is a follow-up to this thread: http://groups-beta.google.com/group/sci.electronics.basics/browse_frm/thread/6...
10 comments posted 21yrs
posted by mnoone.uiuc.edu
10 comments posted 21yrs posted by mnoone.uiuc.edu

PWM in a switching power supply

Hi, First of all, I'm trying to figure out how switching power supplies work (the ones in PCs). I've found very basic i...
23 comments posted 21yrs
posted by sizzlefist
23 comments posted 21yrs posted by sizzlefist

Light switch with Time-out

My two year old son is fascinated with light (and Fan) switches. He will happilly switch one on and off for hours. (wel...
1 comments posted 21yrs
posted by mrbgoogle
1 comments posted 21yrs posted by mrbgoogle

heat sink

Hi: this is a question of 2 transistors mounted on the same heat sink... Two 2N3055 transistors are mounted close toget...
1 comments posted 21yrs
posted by chickenwing-skool
1 comments posted 21yrs posted by chickenwing-skool

UPS gives funny voltages - why?

I have a Conext (by APC) model CNB-325 battery backup power supply (not a real UPS) that shows funny voltages when the...
4 comments posted 21yrs
posted by larrymoencurly
4 comments posted 21yrs posted by larrymoencurly

Tuning into an square wave radio transmitter

Hello. I was wondering how to filter out a 1MHZ square wave radio signal. I got the sender working correcly. I am sendi...
3 comments posted 21yrs
posted by a-vinje
3 comments posted 21yrs posted by a-vinje

threshold voltage and comparator

how does the treshold voltage change the transfer curve of a comparator?
3 comments posted 21yrs
posted by stillbreezy
3 comments posted 21yrs posted by stillbreezy

ISP AVR programmer

Hi all, I would like to buy a programmer for my ATmega8 from ebay.com for example like this: http://cgi.ebay.com/ws/eBa...
1 comments posted 21yrs
posted by geronnimo
1 comments posted 21yrs posted by geronnimo

bandwidth and rise time

how would the bandwidth of an inverting amplifier with a gain of -10 affect the rise time of a square wave input?
2 comments posted 21yrs
posted by stillbreezy
2 comments posted 21yrs posted by stillbreezy

Epoxy & microwaves?

Building a DIY antenna for 2.4 GHz. Need to support elements and bond components together. Are common epoxies non-absor...
14 comments posted 21yrs
posted by me
14 comments posted 21yrs posted by me

Color Organ chip

Sometime in the last few weeks, somebody asked about building a color organ. Well, the 05.26.05 issue of Electronic Des...
0 comments posted 21yrs
posted by NoSpam
0 comments posted 21yrs posted by NoSpam