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Heat pad Answered

Has anyone made a Heat pad before?  I want to build one for an out door cat house.  Maybe I can just use a battery operated light bulb at a high Watt.

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Toga_Dan (author)2012-10-07

If moisture is a concern, then it is good to go low volt. A transformer might be a better option, however. As kite says, heaters pull lotsa amps.

I haven't made a heat pad, but I have adapted xmas lites to run at lower V. A strand has ~ 50 lites in series, powered by 110 v. (IIRC) So each bulb runs ~ 2 V. to run lites from 18 v, simply chop off 9 bulbs.

I've considered doin somethin similar w. heat pads. expect it to be simple enough to hack a heat pad.

Or you could check motorcycle supply. they do stuff with heat elements in gloves, etc.

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Kiteman (author)2012-10-07

Does it have to be battery? Heaters tend to drain batteries very quickly.

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