Sound generator circuit diagrams
Pulse-Generator & Signal-Tracer
Dual-purpose test-instrument. Very simple circuitry, 1.5V Battery-operated Read more...Bells ring Generator
Three circuit options. Can be synchronized to Christmas tree flashing lights Read more...Ultrasonic Dog Whistle
It's well known that many animals are particularly sensitive to high-frequency sounds that humans can't hear. Many commercial pest repellers based on this principle are available, most of them operating in the range of 30 to 50 kHz. Read more...Cuckoo-song Generator
Agreeable, very close sound imitation. Suitable for sound effects, door-bells etc. Read more...Electronic Doorbell with Counter
This circuit uses a synthesized sound chip from Holtek, the HT-2811. This reproduces the sound of a "ding-dong" chiming doorbell. Additionally, the circuit includes a CMOS 4026 counter display driver IC to count your visitors. Read more...Insect Repellent Circuit
Repell those repugnant insects from your Garden this Summer with this insect repellent circuit. Designed by Graham Maynard the circuitry consists of a phase locked loop (CMOS 4047) wired as a 22KHz oscillator. Read more...Precision Metronome & Pitch generator
Precision Frequency generator 1 to 999 Hz. Precision Metronome 1 to 999 beats per minute Read more...
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