Re: 24 Vac -> 5 Vdc isolated?
- From: "linnix" <me@xxxxxxxxxxxxxxxxxx>
- Date: 22 Feb 2006 12:44:31 -0800
DJ Delorie wrote:
I'm planning a project that has 24 VAC available to it, and needs
about an amp of 5v. I've designed a circuit with a bridge rectifier,
a couple of 1000uF caps, and one of these:
http://www.aconinc.com/web05/CX13S2405.html
Small footprint, wide input range (I calculate about 33vdc out of the
caps), electrical isolation, but kinda pricey. All total, the PS
takes up about 2 SQ in of board space (4"x0.5" - yeah, I don't have a
lot of space), half of which is the caps.
Interesting. We are custom ordering something like that, which is a
switching regulating module. Except that we needed 2 resistors to set
the voltage between 1.2V, 1.5V,1.8V, 2.5V, 3.3V and 5V. Maximum of 3A.
We plan on vertical mounting only, with the Vin and Gnd on top. So
that multiple Vin and Gnd can be tied together, for support and
cooling.
The manufacturer claims to be able to do it for $2 to $3 each, qty
1000.
Can anyone suggest a simpler, smaller, or less expensive solution?
No, 120VAC isn't much of an option - this board will go inside my
furnace[*], so running additional 120VAC lines is nontrivial. (and
the 24VAC is needed on the board *anyway*).
[*] http://www.delorie.com/house/furnace/
.
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- From: DJ Delorie
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