Hobby Electronics Basics

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Energy and frequency

Why is it that lower frequencies are known to blow audio speakers seeing that higher frequencies produce more energy RMS...
4 comments posted 21yrs
posted by j.michael
4 comments posted 21yrs posted by j.michael

The End of An Era

I went into a local Radio Shack today to buy a couple of power transistors and some perf board, and I'll be damned if t...
4 comments posted 21yrs
posted by notat
4 comments posted 21yrs posted by notat

Advice on a "stretch" sensor

I am planning to make a breathing sensor (to check for breathing movements) by strapping an elastic band around the che...
4 comments posted 21yrs
posted by brigatti
4 comments posted 21yrs posted by brigatti

Java programming on 8051

I would like to program an 8051 using Java. I know this is a really bad idea, especially since C is so much nicer and w...
3 comments posted 21yrs
posted by gigaduck
3 comments posted 21yrs posted by gigaduck

elektronic

Wer kann mir Auskunft geben über eine Infarot-Sauna? 1) Niedervolt 2) Keramikstrahler Hat jemand Erfahrung?
2 comments posted 21yrs
posted by gundel.jungmann
2 comments posted 21yrs posted by gundel.jungmann

wiring multiple leds - pc modding

hi i wish to wire 6 (or x number) of the same led, using a psu - 12v line. Most probaly it will be an orange led, thoug...
5 comments posted 21yrs
posted by colin2000
5 comments posted 21yrs posted by colin2000

12v DC Delay Timer

Can anyone tell me how to design a delay timer so that when I turn off the car key the timer turns on my pump? I think...
12 comments posted 21yrs
posted by NoSpam
12 comments posted 21yrs posted by NoSpam

Weak telephone line

Hello all, I just purchased a printer/copier/fax combination device. I successfully installed it, and its software on m...
4 comments posted 21yrs
posted by biscuitbecks
4 comments posted 21yrs posted by biscuitbecks

TTL as linear devices

Hi All, I was looking at a '70 era circuit book and found that devices like the 7400 nand gate could be used as a linea...
5 comments posted 21yrs
posted by pdrunen
5 comments posted 21yrs posted by pdrunen

Clapp oscillator

I found this surrey.ac.uk past paper whilst surfing: http://www.ee.surrey.ac.uk/Teaching/Exams/pastpapers/01-02/Spring/...
2 comments posted 21yrs
posted by ajholme
2 comments posted 21yrs posted by ajholme

Cutting windows in project enclosures

Sorry for the trivial question: What is the simplest, cleaniest way to cut windows in a plastic project enclosure box? I...
6 comments posted 21yrs
posted by brigatti
6 comments posted 21yrs posted by brigatti

400Hz Servomotor

Hi to all! I need iof your help. I have a lot of 400Hz Muirhead Servomotor-Tachometer generator mod. 15M81A,fom Mil sur...
0 comments posted 21yrs
posted by freeflyer_NO_TRASH_
0 comments posted 21yrs posted by freeflyer_NO_TRASH_