0 To 12 Volt Variable Dual Power Supply Circuit Diagram ( 7812,7912)Posted on Thursday, 23 August 2012 by AseemSalim

Description

Yesterday I got a comment from FarazShahid on ' 0 To 12 Volt Variable Power Supply Circuit Diagram ', He asked me to upload a 12 volt variable dual power supply circuit diagram so this circuit diagram dedicated to FarazShahid. Here you can see a RV1 that is a dual variable resistor or volume controller .When you rotate the resistor  voltages are increasing/decreasing identically. Every time the voltages are same. If you don't want identical voltages, please connect a single variable resistor separately. Here the volume controller considers as a potential divider.

Parts List

Component No: Value

R1 1K

R2 1K

RV1 100K

C1 1000MF

C2 1000MF

Q1 BC548

Q2 BC558

U1 7812

U2 7912

V1 230 V AC

V2 +12 V

V3 -12 V

B1 BRIDGE

TR1 12-0-12,1A