Power Supply circuits diagram electronics projects

this 16V adjustable power supply circuit is made using TLC271 and some common electronic components. This 16V adjustable power supply circuit based on TLC271 allows voltage input up to 30 volts and provides output voltage between 3 and 16 volts.
Reference voltage is obtained from a red LED to be running the current, no more, no less than 5 uA.
R1 and R4 with values given in the scheme, the output voltage variation will be between 3-8 V.

Using the L296 chip and a few electronic component can be made a very simple 30v variable switching power regulator circuit. This L296 30v variable switching power regulator circuit can provide an adjustable output voltage between 0 and 30 volts. Maximum output current which can be provided by this variable power supply is 2A.
If P1 cursor is at the ground potential, circuit is just a simple power source whose output can be varied by P2, between 5.1 and 30 V. In the given conditions, P2 is set to to obtain 30 V output then, the output voltage will be changed with P1.

A very simple high current power supply circuit can be designed using this circuit diagram that allows a maximum output current of 1A. This high current power supply circuit is designed using conventional electronic components and output voltage adjustment can be switched between some preset values, between 3.5 and 9 volts.
When there is current through the load, the voltage on D1 and D2 is sufficient for the T2 to lead and activate relay . Following open relay T1 and power.