Debouncer (CB20546E)

This anti-ringing circuit was found in an English documentation from 1996. The integrated circuit is the 74LS14.

CA3140 window comparator (CB9461E)
Found in Radio Electronics this circuit has its action determined by resistor R1. The circuit does...
Digital Voltmeter (CB18102E)
We present a circuit formed by six voltage comparators. Each comparator will analyze the voltage...
60's crystal radio (CB22171E)
Found in an English publication from the 1960s, this circuit uses period components, including the...