▲ 68 ▼ What is this wire for? (www.imagenetz.de) submitted 2 years ago by Slow@lemmy.today to c/asklemmy@lemmy.world 18 comments fedilink hide all child comments At one end of the wire is a 3.5 mm Jack plug. On the other end of the wire is presumably a glass LED. When connected to the phone, nothing happens. The LED does not start to glow. Also, this wire doesn't work as a microphone. It's also not an earpiece. What is it for?
[–] Blue_Morpho@lemmy.world 2 points 2 years ago* (last edited 2 years ago) Audio jack ir blaster adapters for phones used to be common. You can still buy them on eBay. Audio is voltage changes which can be set to drive an ir led. You use an app that outputs audio that matches the ir signal protocol. permalink fedilink source parent