This 50% active cycle TTL clock generates signals from 4 to 20 Hz. Its power must be supplied with 5 V and other frequencies can be generated with capacitor replacement.
This circuit generates a precise 100 kHz signal. The signal is given by a crystal and can be used...
This circuit is the traditional 555 oscillator that produces a hum in the piezoelectric...
This circuit is from 1987 documentation. The operating system used is not common today, but two...