Stewart Russell over at scruss blog has an interesting analysis of these Sayso Globords, LED message displays programmable via light pen, or audio input. As far as I can tell they’re designed by a Canada-based electronics component company (Red Current Technologies), and might be specific to Canadian retailers; I haven’t seen them in the northeast U.S., but that’s not to say they’re not migratory devices.
The audio files used for programming the display are clearly FSK-encoded, but I haven’t quite worked out the relationship between the tones and the display bits.
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