Switch with automatic shutdown (CB21258E)

This circuit was found in Maxim documentation from the 1990s. The RC circuit determines the trigger time.

Basic Latch (CB7981E)
This circuit can be applied to several logics. The circuit is from an Electronics Now from the...
Anemometer (CB6483E)
This circuit was found in a Popular Electronics of the 1990s. The sensor is a rotating mechanical...
100 kHz XTAL Oscillator (CB12064E)
The transistor in this circuit can be the BC558 and the capacitors must be ceramic. Crystals from...