ac to dc converter

[BeaverRat]

Is this cell going in your car? If so, you may want a 13.8 volt PSU. If it is staying in your house, then you can run it off of a 12 volt PSU. I am using a 650 watt ATX PSU that runs 52 amps on the 12 volt rail, and thats plenty for me! If you are not putting it in your car, go the atx route and buy a big one that has more power than you think you will need. I would get at least a 500 watt that can run 35-40 amps on the 12 volt rail. that will probably run you 50 dollars. Just for comparison, a 40 amp continuous lab PSU is in the multi hundred dollar range. My 52 amp was only 66 dollars, but if I bought a 52 amp lab power supply it would probably be 300 dollars...

[linkintiger]

ATX is this like power supply standard? because what i saw all power supplies with ATX name in it produce big ampunt of amps at 12V
i found a couple 650 W that has 38 A in +12v rail but the -12v is only 0.6A on most of them is that ok?. I will use it at home.

but some of them have double or triple +12v rail
+12v at 17A +12v 17A like this one http://www.tigerdirect.com/applicati...578&CatId=1079

[BeaverRat]

I am not sure how a multi-rail PSU would convert over to a lab one, so I just got a single rail one. The single rail ones provide much more amperage too. You don't need to worry about the -12 volt, because all you need is the ground and the +12. Here are a couple nice single rail ones...

This is the one I have, but I got it for 66 dollars... It will do 54 amps continuous

http://www.newegg.com/Product/Produc...82E16817256012

Here are some more

50 amps- http://www.newegg.com/Product/Produc...82E16817182200

25 amps- http://www.newegg.com/Product/Produc...82E16817709011

40 amps- http://www.newegg.com/Product/Produc...82E16817371030

The mod is very simple
-Open up PSU chassis
-Cut connectors off the cables, and sort by color (Bundle like colors)
-Solder one black wire to the green (make sure you wrap all the joints with tape)
-Solder the Brown to one Orange
-Solder one black to one end of a 10 watt 10 ohm power resistor and one red to the other end
-Put on terminals to the 12 volt line (figure out which color this is from the manual) and the ground line (black) and you are good to go
-Re assemble the PSU making sure the power resistor isn't shorting anything in the box

[linkintiger]

thank you for links.
so when i will solder green wire to the black one so is the switch on off that is located on the power supply will not work?

[BeaverRat]

No, that is so the switch will work...

[linkintiger]

i found this one it has 32A and pretty cheap too.

http://www.compusa.com/applications/...022&CatId=1079

[linkintiger]

if the power supply has 2 ports +12v 32A and +12v 24 A that mean i can 2 separate hho cells right?

[HHO BLASTER]

Your problem is 12 volts is not what a car or truck is using there fore your voltage drop across each cell will be less then the real world it must run in.

So either reduce the amount of plates, or build your own heavy duty high amp supply for free, from a old micro wave oven

[linkintiger]

do you know any web site with instruction how to do it?

[HHO BLASTER]

do you know any web site with instruction how to do it?

Sure right here, look up my old posts


http://www.hhoforums.com/showthread.php?t=3559