Square-Wave Oscillator

This is a simple multivibrator oscillator:

0.7 x R1 x C1 = one half-cycle period time and
0.7 x R2 x C2 = the other half.

Typical values for 1KHz:

Component Value Component Value R1 100K R2 100K R3 4K7 C1 33n C2 33n +ve 10v

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