This regulated power supply can be adjusted from 0 to 12 volts (DC) and is current limited to 1 amps as shown, The Current control is controlled by power transistors in final section
Figure1 Schematic of Voltage Adjust 0-12V
2-A
2-B
Figure 2. Completed Circuit of Voltage Adjust 0-12V
Figure 2 Show PCB , Assembly circuit 2-A The Voltage Adjust 0-12V and 2-B show completed circuit & test output by Adjust VR1
Data sheet :
The MJE3055T is a silicon epitaxial-base NPN transistor in Jedec TO-220 package. It is
intended for power switching circuits and general-purpose amplifiers. The complementary
PNP type is MJE2955T.
Voltage Adjust 0-12V 
