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Tronica 99: Small LED RPN Scientific, 20 keys
01-25-2016, 05:46 AM (This post was last modified: 01-25-2016 05:50 AM by benbradley.)
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Tronica 99: Small LED RPN Scientific, 20 keys
Has anyone seen anything like this? (the one in the middle, obviously)
I got this circa 1979 as a college student because it "looked interesting." In recent years I've looked online for info. All I've found is that Tronica made many handheld LCD games in the 1980s, and some included calculators, and there's a "Tronica micro" LCD calculator, but I've found nothing about a Tronica LED anything.

It's unique for at least one reason: The keyboard is a 5x4 matrix with 20 keys, and I've never heard of another calculator that does trig/log/exp (is that enough to call it scientific?) with so few keys. It doesn't do scientific notation, but for the size I guess you can't have everything. Runs on a regular 9V transistor battery.

I found the original pic and enhanced the contrast so you can see the legends better (under 7, 8 and 9 are SIN-1 COS-1 and TAN-1) and am including it here:
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Tronica 99: Small LED RPN Scientific, 20 keys - benbradley - 01-25-2016 05:46 AM

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