This circuit was found in an 80's Electronic Engineering. The circuit uses operatives of the time that are not common today. The power supply must be symmetrical.
The circuit presented is a simple MW tuner that can be plugged into the input of any audio...
This circuit activates a buzzer when the voltage applied to the input falls below a preset value in...
In this circuit, Motorola's Linear Interface ICs, R3 is used to compensate to high source...