Triangular generator (CB21445E)

Found in old documentation about neon lamps, this circuit produces very low frequency signals that depend on the selected capacitor.

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Two Transistor Siren (CB4210E)
This well-known siren configuration using complementary transistors is from a 1980s documentation. The...
Light Beam Operated Relay (CB4956E)
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RIAA Preamp (CB1260E)
This circuit is from the Philips integrated circuits manual of 1990. It is intended for magnetic...