TTL pulse detector and indicator (CB22414E)

This TTL circuit with the 7400 serves as a pulse indicator. It must be supplied with a voltage of 5 V.

Wrong Voltage Alarm (CB4478E)
This circuit has an interesting application. If a device with the selector switch in the 110 V...
MW direct amplification radio (CB18314E)
This simple radio circuit was obtained in a Japanese publication in 1967. The circuit uses...
Proximity alarm (CB21300E)
This circuit was found in a Popular Electronics from the 90's. The components used are common and...