gerald_duck: (quack)
Gerald the cuddly duck ([personal profile] gerald_duck) wrote in [personal profile] ewx 2012-11-25 10:03 pm (UTC)

Actually, quite a few things used to use 3.5mm jacks for RS232. Wikipedia says "some miniaturized electronics, particularly graphing calculators and hand-held amateur and two-way radio equipment". Indeed, that's reminded me specifically where I've seen such a serial port in recent years: [livejournal.com profile] kaberett's Casio calculator. (-8
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