Usually we used the IC – NE567 is only tone decoder circuit. But friends believe or not.
We bring it to a frequency generator circuits as well. The band has twin frequencies are 1.6Khz and 4kHz.
-Both on the square waveform signal,
– and It has level amplitude in voltage output maximum as same as the power supply.
How to change frequency.
– This defines frequency of the Resistors and the Capacitors, or calculated from 1.1 / RC, The R is normally set of 2K – 20K.
– Friends try to play on the breadboard before, I hope you has fun with this circuit.
Electronic circuits parts
R1________10K 1/4W Resistors
R2,R3_______1K 1/4W Resistors
C2___________0.1uF 63V Polyester Capacitor
C1_________1uF 25V Electrolytic Capacitors
IC1________NE567 Tone decoder/phase-locked loop
B1__________12V power supply
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