So it seems that many TEC solutions require quite a bit of power in order to run. Power supplies can be quite expensive, but when I did electric R/C, I had found a solution for running many high power battery chargers. The solution: Server Power Supplies. Most server power supplies range from 400W to 1200W (even more if you get one that runs with 220v AC in). They are switching, for high efficiency and low heat, and usually have one massive 12v Rail.
For me, I was able to get this HP DPS-800GB from an HP Proliant Server at work. The server was decommissioned and was going to be recycled. For many of you, all it may take is to ask the right person in IT. I had a friend purchase similar power supplies on ebay for 2 for $30, used. You should be able to find similar deals.
It is a 1000w power supply that is smaller than a 240mm radiator and supplies 82.3A at 12V! I found this wiring diagram online (although it is possible to determine the pinout fairly easily in most cases)
Most power supplies only require grounding one or two pins. This method utilizes a sensor pin that is used to read the load, and adjust the voltage of the power supply accordingly. I took the time to cut a hole in the top of the unit, and wire up this circuit and silicone it in place, giving me a power supply that is adjustable from 12V to 14.4V. Even at full load, the voltage only variates by 0.1v. After some more silicone was applied to the pins to keep any thing from contacting them, I now have an excellent power supply!
I have ran a 350w subwoofer amp as well as 4x 10 amp air compressors simultaneously off of this unit with no sweat whatsoever. I'd try with a TEC setup, but I don't have a TEC budget to try it out with...
Some good information on the subject can be found here in posts 1-9
http://www.rcgroups.com/forums/showthread.php?t=1005309
This thread has pinouts for many different power supplies already:
http://www.rcgroups.com/forums/showthread.php?t=1292514
For me, I was able to get this HP DPS-800GB from an HP Proliant Server at work. The server was decommissioned and was going to be recycled. For many of you, all it may take is to ask the right person in IT. I had a friend purchase similar power supplies on ebay for 2 for $30, used. You should be able to find similar deals.
It is a 1000w power supply that is smaller than a 240mm radiator and supplies 82.3A at 12V! I found this wiring diagram online (although it is possible to determine the pinout fairly easily in most cases)
Most power supplies only require grounding one or two pins. This method utilizes a sensor pin that is used to read the load, and adjust the voltage of the power supply accordingly. I took the time to cut a hole in the top of the unit, and wire up this circuit and silicone it in place, giving me a power supply that is adjustable from 12V to 14.4V. Even at full load, the voltage only variates by 0.1v. After some more silicone was applied to the pins to keep any thing from contacting them, I now have an excellent power supply!
I have ran a 350w subwoofer amp as well as 4x 10 amp air compressors simultaneously off of this unit with no sweat whatsoever. I'd try with a TEC setup, but I don't have a TEC budget to try it out with...
Some good information on the subject can be found here in posts 1-9
http://www.rcgroups.com/forums/showthread.php?t=1005309
This thread has pinouts for many different power supplies already:
http://www.rcgroups.com/forums/showthread.php?t=1292514
Hackintosh G5
(8 items) |
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Hackintosh G5
(8 items) |
