Brand: | McO |
Model: | 515 (026C-515 at the back) |
Type: | Scientific calculator |
Picture: | |
Batteries: | AA x 4 |
Lifetime: |
Introduced: 1974? Terminated: unknown |
Notes: |
Early scientific calculator with 8-digit accuracy and a LED display. The LED display is magnified and to
see its big magnified digits one has to look at it from the correct angle. The
angle is perfect when the calculator is hand held. It has all the necessary
basic scientific functions.
It is quite thick, 2.75 centimeters. There is a slider for the angular mode, radians or degrees. The workings of the "x^{y}"-key might be puzzling to users of this calculator. When you enter a (positive) number and press the "x^{y}"-key an intermediate result is shown, being the natural log "ln" of the number entered. To obtain its power enter the value for y and press the "="-key. My guess is that this calculator uses this formula:
x^{y} = e^{(y · ln x)}
The "DR"-key repeats the "left part" of the last calculation.
The four AA batteries all face the same way. |
©2024 Ernst Mulder