We found this circuit in a Japanese publication in 1967. The circuit consists of a 15 W audio amplifier with germanium transistors including a voltage indicator power supply.
This circuit was obtained from Radio Electronics from the 90s. The infrared sensor is of an...
This circuit is suggested by Motorola and is based on a 1723 voltage regulator. The 2N3055...
Found in documentation from the 1980s, this circuit generates signals that can reach a few...