Infrared tone transmitter (CB20977E)

This simple very low power circuit can be used in a battery powered infrared tone trigger. We found it in an American documentation from the 90s.

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6 or 12 V x 1 A Regulated Power Supply (CB1168E )
This is the traditional configuration of a 6 or 12 V source with 7806 or 7812 integrated circuits, for a...
Auto Fade (CB20652E)
This fader or guitar fading circuit was found in an American documentation from the 1980s. The...
Power supply with voltage quadrupler (CB22343E)
Found in documentation from the 1960s, this power supply employs germanium diodes from the time....