Black Lives Matter - Action and Equality. ... Adafruit is open and shipping.
0

Simple Power Supply Question
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Re: Simple Power Supply Question

by oPossum on Wed Oct 06, 2010 1:33 pm

msymms wrote:Right wrong link. So, will the 8048RF65 suit my needs?
I knew I would need a good heat sink. I was considering adding a small fan as well.

-mark


No, you had the right link. The 8024RF65 is what you want. 12 VAC per secondary.

Image
I am the Possum, and I approve of this message. Sent from MacBook Wheel Sorry for my bad German.
oPossum
 
Posts: 636
Joined: Fri Oct 26, 2007 12:42 am
Location: Michigan, USA

Re: Simple Power Supply Question

by msymms on Wed Oct 06, 2010 2:19 pm

Wow. Thanks a lot.

-mark
msymms
 
Posts: 25
Joined: Fri Aug 20, 2010 10:50 am

Re: Simple Power Supply Question

by msymms on Wed Oct 06, 2010 2:28 pm

Is there any advantage to running each secondary to its own bridge, then connecting the positive output from one and the negative output of the other both to ground? Would this make each rail isolated?

-mark
msymms
 
Posts: 25
Joined: Fri Aug 20, 2010 10:50 am

Re: Simple Power Supply Question

by oPossum on Wed Oct 06, 2010 2:56 pm

Sure, two bridges will allow isolated rails. Each could be a positive or negative supply. The LM317T can be used for both. The disadvantage is one more diode drop in the rectification, so the max output is about 1 volt lower. Using a 14 volt transformer would compensate for that and allow a solid regulated 15 volts from each output.

Image
I am the Possum, and I approve of this message. Sent from MacBook Wheel Sorry for my bad German.
oPossum
 
Posts: 636
Joined: Fri Oct 26, 2007 12:42 am
Location: Michigan, USA

Re: Simple Power Supply Question

by msymms on Wed Oct 06, 2010 3:03 pm

That was fast. Thanks so much. I think this is the way I want to go. You have saved me considerable time.

-mark
msymms
 
Posts: 25
Joined: Fri Aug 20, 2010 10:50 am

Please be positive and constructive with your questions and comments.