These DC powered heating pads are perfect for near-body heating applications. They get warm to the touch but not too hot as long as you provide the appropriate voltage. Simply apply 5VDC to the wire leads and within minutes, the pad will begin to warm up.
These heating pads are constructed using a mesh of Polyester filament and Micro Metal Conductive Fiber folded into a protective Polyimide Film. The fact that these are low power, flexible and draw little power makes them ideal for things like hand-warmers and other heated garments. Maybe hook up a microcontroller and some sensors and make your own climate-controlled hoodie?
These draw a lot of current, which means batteries like 9V and similar will not suffice as a power source. With any wireless applications, check the battery for excessive heat before continuing on.
If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
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Based on 1 ratings:
Pros- good size for area heating, very flexible and they are indeed waterproof in a static position (I wouldn't like to flex them a lot and test that one after a year).
Cons- They don't feel cloth-like or natural, it's a slick plastic coating, not something you want on your skin. Takes a butt-ton of current to get good heating.
I was heating an enclosed box with fan, which this does a pretty decent job at without excessive current draw, my tinkering for warming hands and comfort didn't work out so well, unless you really like shorting LiIon batteries through these, go for some nichrome