This two-transistor regenerative switch works as an excellent trigger for SCRs and other devices that need sharp pulses. The circuit is from an old documentation.
This circuit can be applied to several logics. The circuit is from an Electronics Now from the...
This circuit was found in a Popular Electronics of the 1990s. The sensor is a rotating mechanical...
The transistor in this circuit can be the BC558 and the capacitors must be ceramic. Crystals from...