Comment on I built a picture frame with a greyscale e-paper that runs on battery for yearsparentComments−WrtCdEvrydy5yCould try extracting energy from radio waves with a wire antenna around the frame (it's not a lot, but for charging some sort of battery it could work)
Comments
Could try extracting energy from radio waves with a wire antenna around the frame (it's not a lot, but for charging some sort of battery it could work)