2-7V / 6-8A Power Supply by 723 and 7812

In this 2-7V power supply circuit, for our purpose, we chose IC 723 instead of a three pin voltage regulator forwhy we find it protean and more advantageous in technical details.

Heatsinks of Tr2 and Tr3 transistors must be sufficiently large.

To achive R4,R5 and R6 values, we used some suitable resistors in parallel. For R4 and R5 two parallel connected 0.3ohm/5W resistors for each are used. To take 6A output, we connected two 0.22ohm/5W resistors in parallel, and to take 8A output we connected three 0.33ohm/5W resistors in parallel instead of R6 resistor.

If you change the marked component values properly you can get up to 14V output. For this situation you must disconnect R1,R2,C5,C6,C1,C2,D1,D2 components and connect the positive terminal of D3 directly to the rectified and stabilized supply….

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Thank you.

This entry was posted on Saturday, January 26th, 2008 at 11:16 pm and is filed under Power supply, Variable Regulator, high current power supply. You can follow any responses to this entry through the RSS 2.0 feed.