This circuit is from a 1980s Motorola documentation. The circuit can be made with modern equivalent components. The original circuit is for the 115 Vac (110 V) grid and has two settings.
Random pulses are produced by this multiple oscillator using unijuncion Transistors. The...
Two alternating are produced by this circuit. The output signal must be applied to a power stage...
This receiver for an audio link by modulated light was found in a 90s Elektor. Transistors are common...