parvgupta001

Hello megssie, i am glad that you like warm feet same as i do, Although the battery pack can be made water proof with either silicon or hot glue gun,heated insoles never actually come in contact with water till you have got some kind of water resistant shoes.as a fact there is no risk of shock or overheating even when the entire shoe is submerged in water as it operates at a very low voltage and have built in cutoff feature in the batteries.

Nichrome wire good for high temperature applications with focussed heating onto a very short area as greater resistance perunit lengthCopper wire good for low temperature distributed heating as lower resistance per unit length and low melting point

i made the same but it didn't work because the dynamo don't get enough rpm to produce electricity

Hello using nichrome wire could lead to a lesser no. of turns and thus uneven heat distribution but by using a copper wire of greater length we have achieved the same amount of resistance as in nichrome wire.and according to the law of energy either i use copper wire or nichrome wire both are gonna be emmiting same amount of energy (heat) for a given power input