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| 1000mw 650nm red laser +analog+TEC+Fan+Power supply | |
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| 100mw 532nm dpss laser with analog +TEC+ Power Supply | |
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Tec Power Supply
I am trying to build a refrigerator?
I am a senior mech. engineering student who wants to build my own refrigerator unit (about 36 cubic feet). I plan to do this with TEC devices. I could use some suggestions on the best ways to go about this (best thermal insulators, TEC suppliers, etc.). I have no problems with the mechanical aspects of the device (thermodynamics, structure, etc.), but I am a clueless on how to make a decent power supply. If anyone out there has any experience with any of this, and would like he help out, I would be very grateful. Thanks!
You don't need anything fancy for insulation, kaowool or styrofoam is just fine. You buy the Peltier junction that suits the type of need you have, whetherthat be to cryogencally cool something or just keep a beer chilled. Basically, you feed it low voltage DC, so you just select a power supply out of Digikey that meets the nameplate rating...don't worry too much about ripple current or noise, a Peltier junction could care less about that, so an El Cheapo power supply is fine.
The trouble with Peltier devices is that they are rather inefficient (3% or less), don't have much capacity (a few watts at best), are relatively expensive, and have a very steep Qlow versus delta T curve (a delta T greater than 10 deg C means your refrigeration "coolth" wattage goes way down). Also, make sure you have an adequate heat sink on the hot side or it's not going to work at all!
Gateway Electronicsand All Electronics have some surplus Peltier deivces you can play with for a lot cheaper than buying a brand new one. Good luck!
| No items matching your keywords were found. |
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| 1000mw 650nm red laser +analog+TEC+Fan+Power supply | |
| $550.00 Time Remaining: 10d 20h 12m Buy It Now for only: $550.00 |
| 100mw 532nm dpss laser with analog +TEC+ Power Supply | |
| $165.00 Time Remaining: 10d 20h 15m Buy It Now for only: $165.00 |
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| | Pro-Tec Elbow Power Strap, Large (11 - 13) $21.46 Features of the Pro-Tec Elbow Power Strap: Applies direct pressure below the elbow to alleviate conditions of lateral epicondylitis (tennis elbow), medial epicondylitis (golfer's elbow), supinator muscle strain and tendonitis. Pressurized tubing applies effective, gentle compression and pinpoints target area. Made with plush-back elastic, which lays flat and stretches to allow uninhibited, full range of motion. |
| | Pro-Tec Elbow Power Strap, X-Large (13 - 15) $21.46 Features of the Pro-Tec Elbow Power Strap: Applies direct pressure below the elbow to alleviate conditions of lateral epicondylitis (tennis elbow), medial epicondylitis (golfer's elbow), supinator muscle strain and tendonitis. Pressurized tubing applies effective, gentle compression and pinpoints target area. Made with plush-back elastic, which lays flat and stretches to allow uninhibited, full range of motion. |
| | Pro-Tec Elbow Power Strap, Medium (9 - 11) $21.46 Features of the Pro-Tec Elbow Power Strap: Applies direct pressure below the elbow to alleviate conditions of lateral epicondylitis (tennis elbow), medial epicondylitis (golfer's elbow), supinator muscle strain and tendonitis. Pressurized tubing applies effective, gentle compression and pinpoints target area. Made with plush-back elastic, which lays flat and stretches to allow uninhibited, full range of motion. |
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instant ice with a TEC (peltier)
Buying a new PSU. what do i need to look for?
Buying a new PSU because mine has a max output of 350 watts, which means some of my new games cut out half way through.
i also think my new pc components ive bought need a healthier supply of power.
So, to the main question, what things do i need to think about before i buy a new PSU?
Thanks.
I'll list some pc details here because they always come in handy.
PSU: Q-Tec ADT - 350 (350watts output) 230V~4A 50Hz.
AMD athlon 64 (2.4GHz)
1.5GB RAM
ATI Radeon HD2600 XT (512mb)
Mycurrent PSU and PC components use the 4 pin Molex connectors (thats to connect the hard drives, optical drives and the graphics card).
The CPU gets power through a a 4 pin power connect. and theres a little connector (small 4 pin) for the floppy drive.
Q-Tec is a brand that is often found on lists of "power supplies to avoid". Your problem may not be that 350 watts isn't enough (though it won't hurt to get a better supply), but that your current PSU just isn't providing the advertised power (or not providing it in a reliable way).
You can get an idea of how much power your system will require by using the power supply calculator at:
http://extreme.outervision.com/psucalculatorlite.jsp
Then get something that is at least 1.5 times the calculated amount. More, if you plan on future upgrades.
See:
http://www.eggxpert.com/forums/thread/326304.aspx
for a list of good power supply brands. Corsair PSUs have gotten universally good reviews, but there are lots of other good brands as well. Two of the better power supply review sites are jonnyguru.com and hardocp.com (they do more in-depth testing than some other sites). Newegg is a good place to buy from, but use Pricegrabber or Google Shopping to compare prices --- some items at Newegg are over-priced compared to other vendors.
4.1 that means im better jokes my scores 8.9