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Thanks for the answer sir! My group mate had already went to an electronic technician. The technician used a bridge rectifier 1N4001, Hr1061, 220 micro farad 1000 micro farad capacitors, 6 zener diodes of 3.3, 4.3 for 4.5, 6, 7.5, 8.7 for 9 and 12. volts and voltage selector. Our input voltage is 12 voltage from ac transformer.

Hi all, We have a school project in our Electronics Analysis and design. But our group doesn't know how to start with it and we need it to pass this week. Kindly teach us to make it with PCB design and how to make its schematic design? We should get a regulated 1.5, 3, 4.5, 6, 9, and 12 volts dc output. Thank you very much! :)