Based on a PLL 567, this circuit serves as a receiver for the CB9574E circuit. S tuning is done in R1 and it is used for frequency modulated signals.
This circuit was obtained in an English magazine from 1980, but it can still be easily assembled today,...
This high gain small signal amplifier circuit was found in an old publication on transistors....
It is a simple blinker that simulates the action of an alarm when installed on the dashboard of a...