This 18 V x 300 mA power supply was found in a 1969 documentation. The integrated circuit is difficult to obtain today.
Found in a 90s Popular Electronics, this circuit uses common components. The power transistors can be...
Found in the documentation on PCs, this circuit excites LEDs whose current is determined by R3....
Found in a 1990s Motorola documentation, this high voltage circuit uses a PUT that is not a common...