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Variable dc power supply 0-12Volts (1A or less)

Question asked by Ibe in #Coffee Room on Feb 28, 2013
Ibe
Ibe · Feb 28, 2013
Rank D3 - MASTER
my power supply just broke and I want to build my own power supply which can be adjusted by a potentiometer that outputs 0-12Volts and a current of 1A or below. can anyone give me a schematic diagram?? thanks. Posted in: #Coffee Room
arunchary
arunchary · Feb 28, 2013
Rank C1 - EXPERT
hi, use Lm7812 and use 1Amp fuse in following circuit
https://www.dropbox.com/s/st2svxj3urasspw/variable-power-supply-using-7805.PNG
Ibe
Ibe · Feb 28, 2013
Rank D3 - MASTER
is it okay if I will be using 220V AC? because it is the standard here in the philippines
arunchary
arunchary · Feb 28, 2013
Rank C1 - EXPERT
yes, You can use this circuit because,in this circuit we have bridge configuration as follows in the circuit...............no issues....
Ibe
Ibe · Mar 3, 2013
Rank D3 - MASTER
arunchary
yes, You can use this circuit because,in this circuit we have bridge configuration as follows in the circuit...............no issues....
big thanks sir!
Ibe
Ibe · Mar 3, 2013
Rank D3 - MASTER
okay, what diode should I use on the bridge rectifier?
arunchary
arunchary · Mar 4, 2013
Rank C1 - EXPERT
hi, you can use the diode 1n4007 or ready made bridge IC's are available like W10 so, you can replace with them also//...

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