This circuit was found in an 80's Poptronics. The circuit is a fast trigger whose signal can be taken from the Q2 collector. The supply can be done with voltages from 9 to 12 V.
This amplifier provides a power near to 1W. The supply must be made with a voltage of 9 V coming...
July 2017 - The new Diodes Incorporated AP7350 LDOs with ultra low quiescent current can be...
With earphones connected to the output, this circuit can monitor radio signals from AM...