This circuit is from a Radio Electronics from the 90's. The integrated circuit is from the time and the boost gain is 20 dB.
This small power supply for low currents (5mA) is suitable for power low-power TTL experimental circuits....
This control for a heating element was found in an old documentation. The current in the element...
This circuit is from a 70s Burr Brown documentation. The components are from the time and the...