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This simple low-cost DC power supply circuit provide very stable  DC voltage (adjustable) from 1.2V to 24V. The use of the LM317T regulator IC minimize external parts count so that the complete circuit consists of only 10 components

The maximum output current is 1A

You may use it to power your electronic projects that requires stable DC supply.

FEATURES :
OUTPUT VOLTAGE RANGE: 1.2 TO 24V
 0.1% LINE AND LOAD REGULATION

 COMPLETE SERIES OF PROTECTIONS:  CURRENT LIMITING, THERMAL SHUTDOWN AND SOA CONTROL

Equation for calculation of output voltage:
Vout =1.25 x ( 1+ VR1/(R3+R4) )
where R3 -- 470Ω &  R4 -- 56Ω &  VR1= 0 ~ 10KΩ
 

PARTS LIST
(the following components will be included in the package unless otherwise stated)

Resistor  : ( 1/4W or 1/6W)

• R2 -- Jumper (bare wire)
• R3 -- 470Ω
• R4 -- 56Ω
• R5 -- 3.3K

Potentiometer  :  (B) 10K (linear taper)  (output voltage adjustment)

Capacitors :

• C1  -- 2200 µF 35V Electrolytic capacitor
• C2  --  100 µF  25V Electrolytic capacitor

Miscellaneous items :

 2-contact screw PC terminal block -- x 1 pc.
 3-contact screw PC terminal block -- x 1 pc.

TO-220 Heat Sink (for IC1)  --- x 1 pc.

Printed Circuit Board (included)
Etched & drilled with component side printing 
-----  x 1 pc. 

Power transformer required : 
(NOT INCLUDED)
Primary :  ~230V,   Secondary : 24V-0-24V  @1A