Heat Socks Controller

Being constantly disappointed by the heated socks I've bought I decided to make my own controlled by an arduino and powered by 2-4S lipo. The socks are cheap ones sold on eBay and the idea is to have the battery and control unit tucked away in my jacket with cables to each sock. Obvious downsides in having cables running through my pants but the upsides more then make up for it.

The control unit has a momentary flip-switch ON-OFF-ON and a number of LEDs which shows if it is powered, level of power output and battery status. A N-level MOSFET handles the power output and it it gets too hot the lid can be made of 2mm aluminium acting as a heat sink.

During testing I realized that over 25W is burning up my feet so I that's the limit for fully charged 3- & 4S batteries

As always, if you find it useful a tiny donation goes a long way to show appreciation. :)

Code and schematics: https://www.tinkercad.com/things/j0S4ZQJT6rA

NOTE: Tinkercad only has Arduino UNO which differs fro