This circuit for communications receivers was found in the January 1974 issue of Radio Electronics magazine. The transistors are Japanese types of the time, as the circuit was part of equipment of that origin.
Only those who know the secret activation code will be able to turn on the device connected to...
This circuit was found in a 1991 publication. The transistor can be a general-purpose type....
A frequency divider for digital signals can be constructed based on a single 4018 integrated...