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New TEC plates, need help

post #1 of 5
Thread Starter 
I bought a few small TEC plates to try something out. Am I safe plugging them directly in ( I did and it got very VERY hot, bad idea i know ) How do I safely have them plugged in so they aren't getting too much power ( I do need to check the watts) I did shove a molex connecter on the end of them, again stupid idea but what's the best way to control them without blowing my house up?
    
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post #2 of 5
Quote:
Originally Posted by Exarphcomanantabitom View Post
I bought a few small TEC plates to try something out. Am I safe plugging them directly in ( I did and it got very VERY hot, bad idea i know ) How do I safely have them plugged in so they aren't getting too much power ( I do need to check the watts) I did shove a molex connecter on the end of them, again stupid idea but what's the best way to control them without blowing my house up?
Resistors? TEC's typically will draw as much power as is coming down the line until they fry themselves or blow the circuit. Adding resistors ought to do the trick. There might be variable resistors available, but I honestly haven't looked into that specific option.
    
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post #3 of 5
Thread Starter 
Thanks. Not to be rude but do you know of anywhere I can buy one? or somewhere with templates to put one together? I need to double check the specs and get the rights watts.
    
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50inch Samsung HD TV 23' 3D Vision Hanns G  Logitech Wave (repetative strain in my wrists ;) ) OCZ 700w Corsair Obsidian 800D 
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30gb SSD, 5TB Storage Buffalo Linkstation 1TB NAS 4 Coolermaster Sickleflow, 140mm Yateloons, Art... Windows 7 64bit 
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50inch Samsung HD TV 23' 3D Vision Hanns G  Logitech Wave (repetative strain in my wrists ;) ) OCZ 700w Corsair Obsidian 800D 
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post #4 of 5
Thread Starter 
136.8W TEC Thermoelectric Cooler / Warmer Peltier 12V are the ones I have, so I need a resistor and am I best connecting it to pwm or molex? or does it not matter?
    
CPUMotherboardGraphicsRAM
Intel Core i7 930 @ 2.80ghz OC 3.66ghz X58A Gigabyte Liquid cooled EVGA GTX480 6GB DDR3 1600mhz Patriot 
Hard DriveOptical DriveCoolingOS
30gb SSD, 5TB Storage Buffalo Linkstation 1TB NAS 4 Coolermaster Sickleflow, 140mm Yateloons, Art... Windows 7 64bit 
MonitorKeyboardPowerCase
50inch Samsung HD TV 23' 3D Vision Hanns G  Logitech Wave (repetative strain in my wrists ;) ) OCZ 700w Corsair Obsidian 800D 
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Roccat Pyra Wireless Alienware (from Laptop) 
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CPUMotherboardGraphicsRAM
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30gb SSD, 5TB Storage Buffalo Linkstation 1TB NAS 4 Coolermaster Sickleflow, 140mm Yateloons, Art... Windows 7 64bit 
MonitorKeyboardPowerCase
50inch Samsung HD TV 23' 3D Vision Hanns G  Logitech Wave (repetative strain in my wrists ;) ) OCZ 700w Corsair Obsidian 800D 
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post #5 of 5
Quote:
Originally Posted by Exarphcomanantabitom View Post
Thanks. Not to be rude but do you know of anywhere I can buy one? or somewhere with templates to put one together? I need to double check the specs and get the rights watts.
Quote:
Originally Posted by Exarphcomanantabitom View Post
136.8W TEC Thermoelectric Cooler / Warmer Peltier 12V are the ones I have, so I need a resistor and am I best connecting it to pwm or molex? or does it not matter?
No worries man. Unfortunately I've only ever used TEC's for research projects in my lab (not for a computer)--So I can tell you how I did/would do it in a lab... So all I did was round up some resistors of various resistance, until the TEC got to the appropriate temperature, solder them together, and go with that--I never did any calculations/measurements of power in vs. out, or current in vs. out, or made it "clean" like you'd want for a computer. But since V=IR, Theoretically if you know the volts and current going to them, you add the appropriate resistance to cut the current down to what would give you your TEC's rated power.

I would use molex--is pwm 12v?

If you are operating your TEC at maximum voltage to move 136.8w, then you'd use: P=V*I where P=136.8, V=12v, and solve for I to get I=11.4amps. So your TEC will draw that much power at full thermal movement capacity. So you'll have to measure the current coming out of your power source, then cut it down to 11.4 amps with the appropriate resistance (no way to increase it if it's below that amperage). That's how I'd do it in my lab--also how I'd do it for a computer, but I'm sure there are "cleaner" methods of applying the right resistance rather than soldering a bunch of resistors together.

Then again, connecting TEC's to a computer's PSU might be totally different--can't say for certain. You could use a separate DC power supply if you wanted.
    
CPUMotherboardGraphicsRAM
i5-2500K Biostar TP67B+ XFX HD5750 1GB 2x4GB DDR3 Corsair 1600 
Hard DriveOSMonitorPower
60GB OCZ SSD, 2x160GB HDD RAID0, 500GB+500GB+1.5TB Windows 7 Ultimate 64-bit Samsung SyncMaster 930B Antec SmartPower 450w 
Case
Antec 900 
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CPUMotherboardGraphicsRAM
i5-2500K Biostar TP67B+ XFX HD5750 1GB 2x4GB DDR3 Corsair 1600 
Hard DriveOSMonitorPower
60GB OCZ SSD, 2x160GB HDD RAID0, 500GB+500GB+1.5TB Windows 7 Ultimate 64-bit Samsung SyncMaster 930B Antec SmartPower 450w 
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Antec 900 
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