>>1887056I've used pic related in shoes or between doubled socks. They're a bit too hot with thin socks in between. They only lasted about 30 rides because it's hard to avoid pulling on the pad when dressing or undressing. I got another set that's two pads with DC plug connector of about the same size with one usb-a connector, but it's not quite enough heat. I wouldn't have thought to use the DC motor controller. I don't like how the plastic traps moisture. Heated socks are a bit pricey and probably have poor durability. Foot heaters make it feel colder on the rest of my body, so a design that heats just enough to prevent complete loss of sensation would be best. Feedback control of separate temperature zones might be best and it's not for sale as far as I can tell.
>>1881118I once did a project for a technology business plan course where our imaginary product was insoles with heat pipes. More realistically you can wear a warmer balaclava (possibly heated) and this tells your body to vasodilate.
https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2018152152 for example. But then you feel hot and can't go as fast without discomfort.
