Author Topic: Wrist Heater/Cooler???  (Read 2383 times)

0 Members and 1 Guest are viewing this topic.

Offline SgtRock

  • Supporter
  • ****
  • Posts: 1200
  • Country: us
Wrist Heater/Cooler???
« on: November 02, 2013, 06:30:03 am »
Greetings EEVBees:

--Please see below for a link to a very puzzling article about a device called "Wristify" which can apparently help a person acclimate to a hot or cold building. No doubt the device, having been designed at MIT, probably actually does something, but just what is impossible to tell from the article. It is not at all clear to me whether the device warm or cools one, or merely one perceptions, go figure. The article also mentions "hot and cold waveforms", go figure some more. If anyone can make heads or tails of this one, please comment.

http://www.independent.co.uk/life-style/gadgets-and-tech/news/forget-your-jumper-this-thermoelectric-wristband-can-heat-or-cool-your-entire-body-8918320.html?origin=internalSearch

"Horse sense is the thing a horse has which keeps it from betting on people."
William Claude Dukenfield, W. C. Fields 1880 - 1946

Best Regards
Clear Ether
 

Offline AmmoJammo

  • Frequent Contributor
  • **
  • Posts: 787
  • Country: 00
Re: Wrist Heater/Cooler???
« Reply #1 on: November 02, 2013, 06:31:54 am »
looks like a peltier tied to your wrist.... didn't bother reading the article  :-DD
 

Offline amyk

  • Super Contributor
  • ***
  • Posts: 6769
Re: Wrist Heater/Cooler???
« Reply #2 on: November 02, 2013, 11:15:59 am »
Quote
heating or cooling parts of the skin can help influence how hot or cold we feel over our entire body
Great way to get hypothermia/hyperthermia while feeling perfectly fine...
 

Offline G7PSK

  • Super Contributor
  • ***
  • Posts: 3693
  • Country: gb
  • It is hot until proved not.
Re: Wrist Heater/Cooler???
« Reply #3 on: November 02, 2013, 01:36:39 pm »
I got the idea from reading the article that the idea was to strap a heat sink on your wrist to cool you instead of turning on the AC. A bottle of water poured over you would be more effective and better to look at on the female population. :-DD
 

Offline Rufus

  • Super Contributor
  • ***
  • Posts: 2094
Re: Wrist Heater/Cooler???
« Reply #4 on: November 02, 2013, 03:13:30 pm »
but just what is impossible to tell from the article.

It is a peltier and heatsink stuck on your wrist with wires going to a no doubt stupidly impractical power supply.

Blood flow distributes heat around the body but to have a worthwhile effect a patch on your wrist would have to be uncomfortably hot or cold. The idea that it can make you think you are warm or cold is bollocks IMO.

Trying to control the temperature of your body instead of the environment the body is in has merit because it requires much less energy. Stored energy in hot/cold water which is replenished every hour or two is much cheaper and practical, especially compared to inefficient peltier devices.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf