This static switch or electronic contactor was found in a 1968 Motorola publication. The triac depends on the current of the load it controls. The values shown are for the 120 V power grid.
The diodes of this circuit are general-purpose, and the base resistors are typically between 2k2...
This electronic Morse key was found in a Popular Electronics from the 90's. The components are common,...
This well-known oscillator configuration that produces a siren sound when pressing CH1 is from a...