There already exist wireless doorbells and smart home light switches that harness the energy of clicking the button using a piezo crystal to use for transmitting the signal. But at least the one I have has way too much resistance to use for a computer keyboard
Comment on Look Ma, No Batteries! Hands On With Lenovo's Self-Charging Keyboard
jjjalljs@ttrpg.network 3 weeks ago
Huh. That’s neat I guess.
My initial guess was it would somehow capture the energy from hitting keys. I guess that’s implausible? Too little energy without making the key press resistance too high?
Anivia@feddit.org 3 weeks ago
saigot@lemmy.ca 2 weeks ago
Ianother problem is whatever you have that charges the keyboard, you’d need ~109 of them. I still think it’d be cool tho
Fubarberry@sopuli.xyz 3 weeks ago
Yeah that was my first thought as well for some reason. Obviously solar calculators/etc have been around for longer so that makes more sense, but I fully clicked on this hoping it was energy from key presses.