bOt@zerobytes.monsterM to Today I Learned (TIL)@zerobytes.monster · 8 days agoTIL that early TV remotes worked with a spring-loaded hammer striking a solid aluminum rod in the device, which then rings out at an ultrasonic frequency, requiring no batteries.www.theverge.comexternal-linkmessage-square0fedilinkarrow-up11arrow-down10file-textcross-posted to: engineeringporn@lemmit.onlinetechnology@lemmy.mltheandrocollection@lemm.eeretrotechnology@lemmy.catechnology@lemmy.worldtechnews@radiation.party
arrow-up11arrow-down1external-linkTIL that early TV remotes worked with a spring-loaded hammer striking a solid aluminum rod in the device, which then rings out at an ultrasonic frequency, requiring no batteries.www.theverge.combOt@zerobytes.monsterM to Today I Learned (TIL)@zerobytes.monster · 8 days agomessage-square0fedilinkfile-textcross-posted to: engineeringporn@lemmit.onlinetechnology@lemmy.mltheandrocollection@lemm.eeretrotechnology@lemmy.catechnology@lemmy.worldtechnews@radiation.party