Found in a 1965 General Electric datasheet, this low frequency circuit divides the frequency of a 20 kHz signal by 10, thus obtaining a 200 Hz signal.
This circuit maintains on a flashing LED at a frequency determined by the capacitor. The...
After starting, this circuit turns off the relay in a time that depends on the 4020 pulse-count. This...
This sophisticated circuit is from a 1975 documentation. The components are from the time and the...