Using transistors at the time, this circuit was found in a 1970s documentation. Transistors support modern equivalents for 2A currents at least in the case of the output transistors.
This traditional amplifier with complementary output transistors was found in a publication in...
In this circuit, the LED Will blink in a presence of na áudio signal in the input. Gain is...
This circuit has an input resistance of 100M ohms which makes it possible to detect currents as...