This circuit turns off after a time given by capacitor C1. This component can have from 1 to 1,000 uF depending on the desired time. The circuit is from an Electronics Now from June 1995.
Using an integrated circuit from the time, this circuit was found in Radio Electronics from the...
This power supply can provide 10 A currents. Its regulation is made by 7812 integrated circuit. The...
The circuit shown in the figure can be used to connect a loudspeaker to an amplifier only after...