Reflex receiver (CB8491E)

This circuit was found in a 1968 Hughes documentation. The transistors are from that time. The coil is for the medium or short-wave range.

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Flashing Timer Switch (CB16959E)
This circuit is from 1990 documentation. When we press D1 the lamp remains on for a time interval that...
22.5 Volt Power Supply (CB13004E)
Some old multimeters have a high resistance scale that has an internal circuit powered by a 22.5 V...
Voltage Doubler CMOS (CB17618E)
This circuit, from a 2001 documentation, appears elsewhere on this site. Its purpose is to obtain a...