http://www.vidisonic.com/2010/03/16/12v-4a-power-supply/ Hardware & Software Design Resources Sat, 02 Apr 2011 20:20:25 +0000 hourly 1 http://wordpress.org/?v=3.2.1 http://www.vidisonic.com/2010/03/16/12v-4a-power-supply/comment-page-1/#comment-938 Technofreak Thu, 05 Aug 2010 13:04:25 +0000 http://www.vidisonic.com/?p=176#comment-938 You can use the circuit in http://www.eleccircuit.com/12-volt-30-amp-by-7812/ . You'll see 6 transistors for boosting the current, but for 8A, you can use just two sets of transistor-resistor. You have to provide very large heat sink since the transistor must dissipate 96Watt of power when a 12V drop voltage is developed across the transistor to supply 8A@12V. You can use the circuit in http://www.eleccircuit.com/12-volt-30-amp-by-7812/ . You’ll see 6 transistors for boosting the current, but for 8A, you can use just two sets of transistor-resistor. You have to provide very large heat sink since the transistor must dissipate 96Watt of power when a 12V drop voltage is developed across the transistor to supply 8A@12V.

]]> http://www.vidisonic.com/2010/03/16/12v-4a-power-supply/comment-page-1/#comment-937 Max Thu, 05 Aug 2010 08:02:41 +0000 http://www.vidisonic.com/?p=176#comment-937 I have a 24V 8A power supply. Using an LM7812, I want the output to 12V but retain the 8A from the supply, or atleast 4A. How can i achieve this? Thanks. I have a 24V 8A power supply. Using an LM7812, I want the output to 12V but retain the 8A from the supply, or atleast 4A. How can i achieve this?
Thanks.

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