This circuit was found in the June 1990 issue of Radio Electronics magazine. The maximum current is 1 A and the integrated circuits must be mounted on heat sinks.
This circuit is from a 1979 publication, using displays of 7 segments of common cathode. The...
This Japanese radio is from the 60s, presenting excellent sensitivity and an output power of 100mW...
This circuit can be used in alarms by activating a relay or a current load that depends on the...