How to Make 1.5 to 35V DC Regulated Power Supply Circuit

 Here is the circuit diagram of the stabilized and regulated power supply board. This is a small power supply that provides an adjustable voltage that can be set between 1.5 and 35 volts at 1 amp. This circuit is ready to run. All you have to do is add a suitable transformer. The circuit is protected from thermal overload by the integrated circuit's current limit and thermal overload protection.

Parts:

IC  =  LM317

P1  =  4.7K

R1  =  120R

C1  =  100nF - 63V

C2  =  1uF - 35V

C3  =  10uF - 35V

C4  =  2200uF - 35V

D1-D4  =  1N4007

Features:

Just add a suitable transformer (see table)

Great to power your projects and save money on batteries

Suitable as an adjustable power supply for experiments

Control DC motors, low voltage light bulbs,  

Specifications:

Preset any voltage between 1.5 and 35V

Very low ripple (80dB rejection)

Short-circuit, thermal and overload protection

Max input voltage : 28VAC or 40VDC

Max dissipation : 15W (with heatsink)

Dimensions : 52x52mm (2.1  x 2.1 )

Technical Specifications:

Input Voltage  =  40Vdc max Transformer

Output Voltage  =  1.5V to 35Vdc

Output Current  =  1.5 Amps max.

Power Dissipation  =  15W max (cooled)

Board Dimensions  =  52 x 52mm (2.1" x 2.1")

Note:

It has not to be cooled if used for small powers. 28 Volt AC max is allowed for the input voltage.