@bOtM to Today I Learned (TIL) • 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-square0arrow-up11arrow-down10file-textcross-posted to: [email protected]
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.com@bOtM to Today I Learned (TIL) • 8 days agomessage-square0file-textcross-posted to: [email protected]