This circuit was found in a Electronics World of 1968. The integrated circuit is the MC1320P from Motorola, uncommon today.
The width of the pulses produced by the oscillator in the figure is determined by the value of R1,...
We found this approximately 1.5 kHz oscillator in Texas Instruments technical documentation. The...
This circuit was suggested by old French documentation, but it can be used as a shield, in which...