This amplifier step for small signals can use any general-purpose transistor like the BC548. The circuit can be powered by voltages from 6 to 12 V.
This circuit was found in a 1992 publication. Its purpose is to time the activation of a doorbell...
This basic amplifier using complementary transistor in the output sources about 0.5 W of good...
This amplifier, with germanium transistors, provides a power slightly less than 1 W at a load that...