Programmable Calculators

Programmable Calculators

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A key code chart is located in the back of some manuals to correlate keys to key codes and vice versa. ... (some units) LED (light emitting diode) display a€” LED displays as used in calculators have eight or more digits and are commonly monolithic devices with common cathodes. With character heights of about 0.1 inch, the current requirement for red is about 5 mA per segment but this may rise to 80 mAanbsp;...

Title:Programmable Calculators
Author:Charles J. Sippl, Roger J. Sippl
Publisher:Matrix Publishers, Incorporated - 1978


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