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echo: electronics
to: Roy J. Tellason
from: MIKE ROSS
date: 2003-10-31 22:46:04
subject: weird little oscillator circuit

"Roy J. Tellason" bravely wrote to "all" (31 Oct 03  04:05:37)
 --- on the heady topic of "weird little oscillator circuit"

 RJT> I ran across this,  thought that some of you might find this
 RJT> entertaining...

 RJT> It apparently _is_ a multivibrator,  though with only two resistors
 RJT> and two caps,  a few less parts than the usual astable circuit...

I've seen something similar but this is indeed elegant. The least parts
oscillator I've ever seen consists of a speaker with a stiff wire
soldered so that it touches the cone connection. When the cone moves
forward the connection is broken and the cone returns. Of course you
have to get the right battery polarity to get the cone to move forward.
A close 2nd is a tunnel diode with a resistor and capacitor.

 Mike
 ****

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