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Topic: power adaptor (110V mains to 9V DC) (Read 1 time) previous topic - next topic

aharasewych

Looking for some help with making a power adapter to convert power from 110V mains to 9v DC. Any suggestions on a circuit, or a site to use as a resource?

woody_unreal

http://www.ti.com/lit/ml/slup224/slup224.pdf
Google search wil reward many returns, But wouldnt it be easyer just to use a wall wart (wall adapter)?. Or are you just wanting to build one for fun :) ?


CrossRoads

Linear regulator, or a switching regulator?
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

Osgeld

yes that is a big difference, ie lump of metal with wire wrapped around it and large, or tiny, efficient and more complicated
http://arduino.cc/forum/index.php?action=unread;boards=2,3,4,5,67,6,7,8,9,10,11,66,12,13,15,14,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,86,87,89,1;ALL

aharasewych

This looks right - what do you guys think

woody_unreal

looks like that will work- dont forget the large heat sink :)

CrossRoads

Why an LM317 & all the parts?
Go with a 7809 part and 2 capacitors instead.
http://search.digikey.com/us/en/products/NJM7809FA/NJM7809FA-ND/805766
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

db2db


I agree use a 7809, but also a transformer with a 12v secondary to reduce the size of the heatsink.

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