tl;dr: I am looking for an easy way to keep snow and ice from a small piece of glass for a camera to look through. Everything is battery operated. What are my options?
For one of my new projects, I am going to build a battery-powered Raspberry Pi driven video recorder based on motion (that's a mouth full). There are a lot of technical challenges, one of them are the incredibly harsh conditions it's going to face.
I will make a 3D printed case with a hole (covered with glass) for the camera to peek through. However I am looking for a way, a heating element of some sorts, to keep the glass from getting covered in snow and icing up. The only heating element I know is the heating pad from Adafruit:
But that is more an on-body kind of thing so I feel that might be a waste of energy? Are there any better ways for what I want, that I can easily make battery powered?
The extra challenge here are the conditions outside. It will be out there in the wild on its own, on a pole of some sort. And since I live in the Artic temperatures can sometimes go down to -40. I don't *know* if this will work yet, if the battery will even survive (it only needs to be on for an hour or two). But I want to start experimenting with it and see how much I *can* do. We get a huge amount of snow in the winter and I want the camera window always to be clear.