Circuit Project Electronic

This is Circuit MOSQUITO REPELLANT.
By High Frequency Sound.
Use a electronics part ,easy to find and low cost.
To See Circuit, have IC 555, 4017, 4011 and BC337,BC327.
Output Piezo Speaker.
Volt suppy +12V.
Easy to build see PCB:

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Astable Multivibrator by IC LM3900 For oscillator-generator and LED Display.
Use clock circuit or the origin is pulse or LED Flasher 2 LED. By R1 use fine the frequency of the circuit.
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XR2206 Function Generator.
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