Power Supply circuits diagram electronics projects

Using HV2405E chip, manufactured by Harris, along with a few external components connected like in this circuit diagram can be achieved a voltage stabilizer without a voltage transformer. Using HV2405E chip can get a 5 + 24V stabilized voltage directly from the mains AC 100 260V.Peak output current of stabilizer is 50 mA.
Integrated circuit contains a preregulator ensuring charge of C2 a sufficient capacity at the beginning of each voltage network. Charging continues until the capacitor voltage has reached a desired value plus 6 V.

A 15v variable power supply circuit which can be adjusted in the range 1.5 15 volts, can be designed using this circuit diagram.

Using a LM723 variable regulator can be designed a very simple voltage regulator which can provide a maximum current up to 2A and a variable voltage between 2 and 25 volts.