Schematic DIY KitTone Generator All that is on its Toene
Everything makes noise: siren, fog horn, door chime

Here you will find Schematic Circuit Diagram for DIY and further information on Tone Generator
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Siren howling with disgusting transistor-based modulated (Astable multivibrator) www.ferromel.de/tronic_18731.htm
Door Chime with SAE800
Triad Gong
www.meakesselsdorf.de/projekte/gong/gong.html

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