Found in a 1965 Motorola documentation, this circuit uses a neon lamp as a trigger element. The SCR admits equivalents and the lamp must be incandescent.
This circuit is from 1977 documentation, but can be assembled with BC548 for Q1, Q2 and Q4, BC558...
This oscillator circuit for sinusoidal audio signals with operational 741 requires a symmetrical power...
This circuit compares the input voltages by providing an output according to the curve next to the...