Martineski@lemmy.dbzer0.com to Digital Art@lemmy.world · 4 days agoI was looking up how battery free pens work and found this.lemmy.dbzer0.comimagemessage-square10fedilinkarrow-up1181arrow-down13file-text
arrow-up1178arrow-down1imageI was looking up how battery free pens work and found this.lemmy.dbzer0.comMartineski@lemmy.dbzer0.com to Digital Art@lemmy.world · 4 days agomessage-square10fedilinkfile-text
minus-squaredustyData@lemmy.worldlinkfedilinkarrow-up7·4 days agoThey often have a small capacitor that feeds them and acts as a tiny, couple of minutes long, battery.
They often have a small capacitor that feeds them and acts as a tiny, couple of minutes long, battery.