Audio Oscillator


Posted on Jun 10, 2012

Two gates, U1A and U1B O/3 of a 4049 hex inveter), are connected in a VFO circuit. Components Rl, R3, and CI set the frequ


Audio Oscillator
Click here to download the full size of the above Circuit.

ency range of the VFO. With the values given, the circuit"s output can range from a few hundred hertz to over several thousand hertz by adjusting R3. The simplest way to change the frequency range of the oscillator is to use different capacitance values for CI. A rotary switch, teamed up with a number of capacitors, can be used to select the desired frequency range.




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