ac to dc converter

[linkintiger]

1.I was looking for ac to dc converter so i don't have to start my car every time i want to test my cell.

2.I was wonder i have 11 plates 6x6 +nnnn-nnnn+ cell (1/8 gaps between) i produce 1.9-2.0 lpm at 14-18amps on baking soda mixture you think that PWM will incrise production?

[BeaverRat]

1. A good av to dc converter is to mod an atx PSU so you can plug it in and tap into the 12 volt line. You can google how to do it with the keywords "convert atx psu to lab psu".

2. There is almost no chance you are producing 2 lpm at 18 amps... You should redo your flow test. That would
probably make your cell the most efficient on this forum!

[H2OPWR]

1.I was looking for ac to dc converter so i don't have to start my car every time i want to test my cell.

2.I was wonder i have 11 plates 6x6 +nnnn-nnnn+ cell (1/8 gaps between) i produce 1.9-2.0 lpm at 14-18amps on baking soda mixture you think that PWM will incrise production?

A PWM will in no way ever increase effeciency or production. It will only limit amp draw by pulsing the power.

Larry

[HHO BLASTER]

A PWM will in no way ever increase effeciency or production. It will only limit amp draw by pulsing the power.

Larry

They never learn Larry, it's like catching a mouse in the same trap over, and over

[linkintiger]

beaver when i will have time i will do a video for what i did maybe i did mistake in calculation but for now to tell you how i did i put ice mountain 0.9 fl oz empty bottle under the water i start my cell it was full in like 14-15sek to be full so i multiply by 4 and that's how i get 1.9-2.0 lpm

[linkintiger]

ok let say i will buy 400 watts old pc power supply and i will run my cell at 12v that gives me power supply which will have 33amp ? and if i will run at 24v it will give only 16 amp right?

[BeaverRat]

Linkintiger- If you filled up a .9 Fluid ounce (26.6 ML) bottle in 15 seconds than your data would look like this

Voltage:13.8?
Amps:18
Liters: .0266
Seconds: 15
LPM: .106
MMW: .43 (Terrible)

If you typo-ed and meant a 9 fluid ounce bottle that would put you at

Voltage: 13.8?
Amps: 18
Liters: .266
Seconds: 15
LPM: 1.064
MMW: 4.3

Either way you aint getting 2 LPM

[BeaverRat]

ok let say i will buy 400 watts old pc power supply and i will run my cell at 12v that gives me power supply which will have 33amp ? and if i will run at 24v it will give only 16 amp right?

NO,
You have to look at what the 12 volt rail supports for continous amperage. A 400 watt PSU has to divide that 400 watts between, 12 volts, 5 volts, 3.3 volts, -12 volts, and -5 volts. You will actually get around 15-20 amps depending on the model at 12 volts. And no, you can't run it at 24 volts unless you guy 2 PSUs.

[linkintiger]

ok my mistake with the calculation it's just 0.5l -1PT (0.9 fl oz)on the bottle i thought that the bottle has 500ml i guess i was wrong

[linkintiger]

so which will be the best? (cheap way) to buy pc power supply or to buy ac to dc converter

or buy 2x 500 W power supply and connect them together like + to + and - to - so if the rail is 15 A that will give me 30 A?

[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/applications/SearchTools/item-details.asp?EdpNo=5250578&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/Product.aspx?Item=N82E16817256012

Here are some more

50 amps- http://www.newegg.com/Product/Product.aspx?Item=N82E16817182200

25 amps- http://www.newegg.com/Product/Product.aspx?Item=N82E16817709011

40 amps- http://www.newegg.com/Product/Product.aspx?Item=N82E16817371030

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/SearchTools/item-details.asp?EdpNo=2227022&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

[linkintiger]

nice post but i think it's too much math and calculation involve into it to get what i want and also it's to dangerous with out the knowledge

[BeaverRat]

I would only go the PC ATX PSU route if you don't plan on putting it in your car. If you run off of 12 volts vs 13.8 volts you have to have 1 less N plate to have the same voltage per gap. In short, if you are going to put it in your car, find a 13.8 volt, otherwise, the atx PSU will work perfect as long as you build your cell with 4 N plates.

[HHO BLASTER]

nice post but i think it's too much math and calculation involve into it to get what i want and also it's to dangerous with out the knowledge

No math, some trial and error trust me i hate math the hardest part is knocking out the transformer secondary

[linkintiger]

what got my attention one power supply has this specification

Load Range +3.3V@26A; +5V@32A; +12V1@14A; +12V2@17A; -12V@1.5A; +5VSB@2.5A

Combined +12V Rating 228 Watts


it looks like i can combine +12v1 and +12v2 together and then it will give me more Amps

[HHO BLASTER]

what got my attention one power supply has this specification

Load Range +3.3V@26A; +5V@32A; +12V1@14A; +12V2@17A; -12V@1.5A; +5VSB@2.5A

Combined +12V Rating 228 Watts


it looks like i can combine +12v1 and +12v2 together and then it will give me more Amps

Of course you can

[Philldpapill]

You CAN, but it's not a good idea. The 12V rails are usually SLIGHTLY different voltages, so if you turn the PSU on without a load, but the rails are connected in parallel, expect sparks to fly, a breaker to trip, or a fuse to blow. However, if the rails are severely loaded, it won't be a problem. It's just when they aren't....

[BeaverRat]

You CAN, but it's not a good idea. The 12V rails are usually SLIGHTLY different voltages, so if you turn the PSU on without a load, but the rails are connected in parallel, expect sparks to fly, a breaker to trip, or a fuse to blow. However, if the rails are severely loaded, it won't be a problem. It's just when they aren't....

Exactly, that is why I recommended that you use a single 12 volt rail PSU like the ones I linked in an earlier post.

[linkintiger]

ok thx a lot