Astable Multivibrator

Posted on Feb 6, 2014

This is an Astable Multivibrator Circuit to alternately flash two LEDs. The R and C Values determine the frequency and the 470 ohm collector load resistors set the current to about 20 miliamp, when the circuit is operated at 12Volts. Frequncy is about 1Cylce per second using 22uF capacitors and 47K resistors. Smaller R and C Values will increace Freq

Astable Multivibrator
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uency. The LEDs may also be wired in series with the collector resistors and other transistors can be used.

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