Astable Multivibrator.

162

04:11:47

One of the simplest square wave generator circuits, with only 4 resistors, 2 capacitors and 2 npn transistors. Can generate frequencies up to 800 KHz, maybe more.
The one shown has frequency of about 1.5 KHz. The formula is as follows
f = 1/(1.38 RC) assuming both capacitors are equal and the series resistors (ones in the mid) are equal.

published 9 years ago

BillyT

9 years ago

Good information, ElectroDroid also has good 555 info.

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