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Electronic Canary
This circuit is a modified hartley oscillator with a couple of extra components included. The transformer is a small audio transformer...
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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.
---574
Electronic Siren
An electronic siren made from discrete components.
---451
Metronome Circuit
This circuit uses a couple of Op-amps to produce an interesting sound effect.
---452
SAMPLED SOUND PROCESSORS
The simplest way to hook up all of these sample and hold circuits is in series with a common control circuit, so that on each clock pulse the last S&H (number N) samples the output of the preceding one, then number N-1 samples number N-2, and so fort
---866
Sound Effects Generator
This circuit uses a UM3561 IC to produce four different sound effects.
---449
Sound Effects Generator 2
This circuit uses the Holtek HT2884 IC to produce 8 different sound effects.
---450
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