Found in an EDN from the 90s, this circuit makes use of integrated circuits of the time, some of which are uncommon today. The output is given by:
Where:
We found this circuit in Radio Electronics magazine. It triggers a load (relay) by the noise from...
We found this circuit in documentation from Ferranti from 1968. The circuit uses transistors from that...
This circuit was obtained in a 1976 magazine. We can use the 555 and another BC548 to generate square...