We found this circuit in an American publication from the 1990s. The circuit has a Darlington stage to drive a high-power LASER diode.
This 1988 documentation circuit includes a charger and an inverter to power a small fluorescent lamp. The...
This circuit can act as a receiver for the transmitter of the previous circuit. We found it in...
The power source shown for powering for small TTL circuits was found on a Radio Electronics...