7v from a computer power sorce question

Reply to Thread

Discussion in 'General Electronics Chat' started by thetank, Feb 14, 2007.

Reply to Thread

Feb 14, 2007 #1

thetank Thread Starter Member

Feb 13, 2007

14

0

can some one tell me how you can get 7v from a computer power supply by connecting the 12v+ and 5v+ together and not hurt anything?

#1 Like Reply
Feb 14, 2007 #2

beenthere Retired Moderator

Apr 20, 2004

15,808

295

If they do, it won't be true. You might feed an LM317 with the =12 output and use it to supply the +7.

#2 Like Reply
Feb 14, 2007 #3

n9352527 AAC Fanatic!

Oct 14, 2005

1,198

6

Some say that connecting the load between 12V and 5V terminals gives 7V supply (12-5=7). I wouldn't want to bet on how safe this is, probably will work with small load harmlessly as their grounds are shared. Large load would probably not be safe.

#3 Like Reply
Feb 14, 2007 #4

Porkchop Member

Feb 5, 2007

17

0

It does work the 7V measured it the potential difference.

Regarding safety i'm not sure. People only use this for running there 12V fans at a lower rpm.

Id say its bad practice and not a good permant solution but i have never heard and horror story's on the net because of this ?

#4 Like Reply

Loading...

Related Forum Posts:

Power supply question from a noob

Posted by lrubin28 in forum: Power Electronics

Replies:

3

Views:

349
Question about source current from a basic DC power supply

Posted by hunterage2000 in forum: General Electronics Chat

Replies:

13

Views:

1,225
Controlling a solenoid valve from a computer

Posted by brainy19 in forum: General Electronics Chat

Replies:

7

Views:

1,947
Using 7v To Power Unit Requiring +7v -7v

Posted by CHays in forum: The Projects Forum

Replies:

7

Views:

1,807
Reducing voltage from a computer power supply

Posted by Robert W. Boyle in forum: The Projects Forum

Replies:

3

Views:

3,560

You May Also Like:

Load More Articles