This simple clock can be used to generate signals up to 100 kHz, depending on the crystal. We found it in a 1967 documentation. Note the high supply voltage.
This circuit can generate signals from 80 to 800 Hz with an amplitude of 0.3 V. We find it in a...
This circuit was obtained from ancient documentation using transistors of the time. The circuit...
The SCR used in this 80's circuit depends on the load. The control is half wave and instead of the neon...