This blocking oscillator configuration was found in a 1964 American book. The circuit can be designed with modern transistors and the frequency depends on the transformer.
This circuit is intended to manipulate a transmitter (CW) from coded audio signals recorded on a...
This circuit uses the SQ3524, a switching integrated circuit. The circuit was found in the April...
We have in the figure as a monostable a proximity switch where our body capacitance (estimated at 200...