This 18 V x 300 mA power supply was found in a 1969 documentation. The integrated circuit is difficult to obtain today.
This circuit is from a 1987 American publication called Electronics Handbook. The circuit can be...
We found this circuit in the March 1992 issue of Radio Electronics magazine. The circuit uses an...
When the input voltage is higher than 2/3 of the power supply voltage the green LEDs glows. When...