Message #8 Posted by Michael de Estrada on 13 Feb 2012, 9:49 a.m.,
in response to message #7 by Maximilian Hohmann
You are correct ! I had completely forgotten about the Sinclair Scientific.
The dimensions I measured using a ruler are as follows:
Hanimex 276 : 3-7/8" L X 2-1/2" W X 7/8" T
Sinclair Scientific : 4-3/8" L X 2" W X 3/4" T
That works out to the following areas and volumes:
Hanimex 276 : A = 9.7 in^2 V = 8.5 in^3
Sinclair Scientific : A = 8.8 in^2 V = 6.6 in^3
Also, the Sinclair is 9 grams lighter at 105gm with 4 AAA cells .vs. 114gm for the Hanimex with a 9V battery.
So, I probably should have made the title "the second smallest ever RPN LED calculator."
The Sinclair was far more limited with only a two level stack and no storage memory, although it could handle much larger numbers due its perpetual scientific notation mode. Also, it performs trig operations in radians only and lacks the constant pi for easy conversion from or to degrees. Log operations are base 10 as well.
Edited: 13 Feb 2012, 10:59 a.m.