Found in a 1966 documentation, this circuit monitors the operation of an air conditioning system. Transistors are from the time.
The circuit shown is a white noise generator using a zener diode as a source of noise. The...
This circuit decodes a two-bit value into four outputs (one of four). The circuit must be powered by...
In the figure we have an anti-ring or debouncer circuit with 555. The duration of the pulse is...