Before Bluetooth, this wireless keyboard used infrared light

There is nothing new under the sun. Or nihil sub sole novum, to give it in Latin, which always imparts a kind of bulletproof authority to any aphorism. Or if you’re feeling particularly fancy, אֵין כָּל חָדָשׁ תַּחַת הַשָּׁמֶשׁ, to give it in Hebrew; it is a line cribbed from the Bible after all.

Let me introduce you, by way of illustration, to my latest eBay find, a wireless keyboard for vintage Macs. While modern wireless keyboards connect over Bluetooth, or using a little RF dongle that you slip into a spare USB port, this one communicates with the Mac using infrared light pulses, with the signals received by a chunky IR receiver that plugs into an ADB port.

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