Anybody know what type of curcuit you would need to create a battery powered heat sock. I know you can buy them pretty cheap but I thought I would try to make one first.
This sounds like a *really* bad idea. Would you really rather risk the very real possibility of the circuit not going 100% as planned and potentially hurting someone badly, instead of purchasing an inexpensive product that does the same thing?
Not to sound too motherly or anything, but I use nichrome wire to melt plastic at about 250°C, and that stuff warms up very quickly, and can dramatically change temperature with a relatively small change in voltage. It's not worth messing around with putting something potentially REALLY dangerous attached to someone's body.
