Automotive power control (CB7111E)

Found in an Electronics Now from the 90s, this circuit is used to control the supply of accessories in the car. Components are common today.

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MW Transmitter (CB4663E)
This small MW transmitter emits its signals at a distance of a few tens of meters, depending on the...
Self-powered radio (CB20515E)
We found this circuit in a documentation from the 50's. The transistors are germanium types. The...
Double Touch Switch (CB16980E)
This bistable touch sensor circuit uses a relay and is very sensitive. We found it in a 1990...