This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
Found in American documentation from the 1980s, this circuit is a basic signal rejection filter...
This circuit is from a Radio Electronics magazine from February 1992. The circuit has the effect...
This "debouncer" was found in Popular Electronics, using TTL technology. For this reason, it can be...