Transistorized multimeter (CB7355E)

This circuit is from a 1967 Triplett manual. The circuit uses components of the time, the common FET and the general-purpose bipolar transistor.

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Car Alarm (CB4412E)
We found this alarm in a 1992 documentation. The circuit has several timings and the relay can...
Receiver without Power Supply (CB3838E)
The signal itself captured by the (long) antenna serves to feed this simple experimental circuit....
Windscreen Wiper Interval Timer (CB4963E)
This version is from an old 80's documentation. The SCR can be the TIC106 and the unijunction...