12volt 3 amp power supply

B

bryan

Member

• Dec 21, 2003

• #1

Hello:

Can anybody point me to a schematic for a 12 volt power supply capable of providing up to 3 amps of current.

 

mozikluv

New Member

• Dec 21, 2003

• #2

12v power supply

hi,

you can try this websites, they hve all you need. if you want to have it regulated, they have the schems.

**broken link removed**

http://www.discovercircuits.com

 

panic mode

Well-Known Member

• Dec 21, 2003

• #3

just google for "12V power supply" or check following

Here is schematic for 18V / 5A.
If you replace 470 Ohm resistor for 330Ohm
You will get ca 13V.

**broken link removed**



Here is one for 10A current and range 5-15V

http://members.tripod.com/michaelgellis/power4.html


Here is 3A version for 3-25V

**broken link removed**

 

R

Rescyou

New Member

• Dec 21, 2003

• #4

P-Supply

Use an old computer power supply, there are millions around and they are cheap. You will usually have to throw a resistor on one of the +5v sections to make it function correctly without the computer.

https://www.epanorama.net/links/psu_computer.html

Resc.

 

B

bryan

Member

• Dec 21, 2003

• #5

Thanks everyone for the links. I like the idea of the old computer powersupply, cheap and compact.

 

B

bryan

Member

• Dec 21, 2003

• #6

Re: P-Supply

Any idea of the value and the wattage to "trick" the switching power supply there is actually a load attached.

Rescyou said:

Use an old computer power supply, there are millions around and they are cheap. You will usually have to throw a resistor on one of the +5v sections to make it function correctly without the computer.

https://www.epanorama.net/links/psu_computer.html

Resc.

Click to expand...

 

M

mixos

New Member

• Dec 22, 2003

• #7

Also check some PSU's here:

https://www.electronics-lab.com/projects/power

 

H

hydro

New Member

• Dec 22, 2003

• #8

try this link https://www.epanorama.net/links/psu_linear.html

Probably the best info online for designing power supplies...Lots of circuits and theory