Unijunction metronome

Posted on Oct 30, 2012

The UJT-oscillator frequency is determined by the 100 µ¥ capacitor and the effective resistance of the 22 and 470 resistors and the potentiometer. Rate can be varied from 42 to 208 beats/minute.

Unijunction metronome
Click here to download the full size of the above Circuit.

The circuit should be housed in an insulated box for safety, or use ground (3-wire cord).

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