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Elektronika MK52, Электроника МК-52, calculator, Period 1983–1991, ROMː512 B, RAMː 15 registers, 105 program steps, Displayː VFD, 8 + 2 characters, Size: 78 × 212 × 35 mm, Weight: 250 g, 4 × AA battery Elektronika MK-52 Calculator PCB. The Elektronika MK-52 (Russian: Электро́ника МК-52) is an RPN-programmable ...
The TI-59 is an early programmable calculator, that was manufactured by Texas Instruments from 1977. It is the successor to the TI SR-52, quadrupling the number of "program steps" of storage, and adding "ROM Program Modules" (an insertable ROM chip, capable of holding 5000 program steps). Just like the SR-52, it has a magnetic card reader for ...
One octave of 12-tet on a monochord (linear) The chromatic circle depicts equal distances between notes (logarithmic) Since the frequency ratio of a semitone is close to 106% ( 100 2 12 ≈ 105.946 {\textstyle 100{\sqrt[{12}]{2}}\approx 105.946} ), increasing or decreasing the playback speed of a recording by 6% will shift the pitch up or down ...
SR-50 (1974) Printed circuit board. Data code 035: 3rd week 1975. The SR-50 was Texas Instruments' first scientific pocket calculator with trigonometric and logarithm functions. . It enhanced their earlier SR-10 and SR-11 calculators, introduced in 1973, which had featured scientific notation, squares, square root, and reciprocals, but had no trig or log functions, and lacked other featur
The duodecimal system, also known as base twelve or dozenal, is a positional numeral system using twelve as its base.In duodecimal, the number twelve is denoted "10", meaning 1 twelve and 0 units; in the decimal system, this number is instead written as "12" meaning 1 ten and 2 units, and the string "10" means ten.
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The first American-made pocket-sized calculator, the Bowmar 901B (popularly termed The Bowmar Brain), measuring 5.2 by 3.0 by 1.5 inches (132 mm × 76 mm × 38 mm), came out in the Autumn of 1971, with four functions and an eight-digit red LED display, for US$240, while in August 1972 the four-function Sinclair Executive became the first ...
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