We found this circuit for musical instruments in the March 1992 Radio Electronics magazine. The circuit has outputs according to the desired scale from a crystal oscillator at the indicated frequency.
The purpose of this circuit is to enable the car or motorcycle starting system only for a certain...
We found this circuit in a 2001 publication. It consists of a system that automatically discharges a...
We found this circuit in an American publication from the 70s. The circuit has only the integrated...