Camera peltier cooler

ir

[Gary Honis] has been modifying his Canon Digital Rebel XSi in order to do astrophotography. He previously removed the IR filter and replaced it with a Baader UV-IR cut filter that lets most infrared light through. However, in order to reduce noise in the pictures, he had to cool the camera down. He based the project on a peltier cooler that he salvaged from a powered beverage cooler. He made a small aluminum box and insulated it with styrofoam to hold the camera body. The peltier cooler was then attached on the side. It takes just over an hour to cool the camera down to 40 degrees, but the shots come out a lot clearer.

[thanks adam]

Peltier-based cooling/heating backpack

[Max Weisel] recently created a Peltier-based cooling/heating system that fits into a backpack. The system uses two Peltier units, each running at 91.2 watts, with computer heat sinks mounted on one side of the unit to dissipate the excessive amounts of heat generated. While he was originally trying to build a cooling backpack, the use of the Peltier units meant that the cool side would become warm when the direction of current was switched, meaning that the backpack could become a heating backpack with the flip of a switch. In order to power the two Peltier units, he uses two 12v motorcycle batteries, weighing in at around 5 pounds each. While this backpack might be a little heavy for your back, it looks promising for anyone who needs to keep things cool (or warm) on the go.

Peltier beverage cooler

peltier beer cooler

Hacked Gadgets pointed out this great peltier based beverage cooler. It has a pulse width modulation based controller driving a 12V 80W peltier. Alan also pointed out Hack-A-Day reader Chris Garrison’s peltier beer cooler from last summer. The Defcon cooling contest from last year also featured a peltier based cooler.

[UPDATE: Afrotech’s Snapple Cooler or How to enhance your beverage with iron oxide. Thanks liam]

[UPDATE: PeltierBeer cooler first seen on Slashdot [thanks Wiki Multipla]. Mattt’s Peltier Beer Cooler on Bit-tech [thanks dougedey].

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peltier desktop drink cooler

peltier drink cooler
i found this link in my inbox, courtesy of j. peterson.  we’ve posted a peltier beverage cooler before, but i think this one deserves mention as well.  it hasn’t had the finishing touches, so it’s not as pretty yet.  however, this one does come with a digital temperature readout.  more importantly, it’s big.  you could countersink a couple of these babies into your dining room table and start living the 21st century good life, as imagined way back in the mid-1900s.

just think, your home of the future, complete with soda-cooling, plate-heating countertops and a kitchen computer.

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Thermoelectric Dry Ice Generator Does Not Work (Yet)

[Pabr] is trying to make dry ice the hard way by building a thermoelectric dry ice generator. The project is a well planned round trip through thermodynamics and cryogenics with a hard landing on the icy grounds of trial and error.

[Pabr’s] four stage Peltier element on a heatsink.
While dry ice can be obtained with simpler methods, for example by venting gaseous CO2 from fire extinguishers and collecting the forming CO2 flakes, [pabr’s] method is indeed attractive as a more compact solid-state solution. The setup employs a four stage Peltier element, which uses four Peltier stages to achieve a high temperature differential. With sufficient cooling on the high-temperature side of the element, it should be well capable of achieving temperatures below -78.5 °C, the sublimation temperature of CO2. So far, [pabr] has built three different setups to expose small amounts of CO2 to the cold of the Peltier element, hoping to observe the formation of little dry ice flakes.

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