One microsecond delay (CB22439E)

This TTL circuit with the 74121 has a delay given by the capacitor of 680 pF. This component can be changed to get other delays.

Who is the fast (CB9809E)
This simple TTL circuit indicates which was the first to press one of the four pressure switches. The...
Unijunction transistor sequential timer (CB21400E)
This circuit was found in Motorola documentation from 1968. Transistors can be modern equivalents, just...
Square generator with 2N2646 (CB23919E)
In this circuit, a unijunction transistor controls a multivibrator providing a rectangular signal...