Elwro Desktop calculators (3)

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The purpose of this page is to show only units which I have. Units which I don't have are covered in Elwro Desktop Calculators List.

Elwro manufactured these desktop calculators since 1970s. Early units were clones (some even using genuine parts!) of Busicom Japanese calculators. From simple 4-operation devices these calculators evolved to complex, scientific and in last models even programmable calculators, using not only western, but also Polish components.

WARNING: Technical parameters are parameters of the particular unit. These calculators were made in a hard times, when western components were not easily accessible. It means that some units may have modifications to use replacement components.


Elwro 181

Type Scientific desktop
Display: VFD, Futaba?, 9-digit, 8 active
Keyboard: Membrane
Chip: Nec uPD953C
Display driver: on-chipset
Additional parts: DEG/RAD switch
Operations: +, -, /, *, sqrt, x^2, y^x,  trigonometric, engineering format, memory, Pi, powers, logarithms.
Elwro 181 was another Elwro's scientific calculator - and again it was using western components. This time it was a NEC uPD953C calculator chip, a 9-digit rectangular VFD tube (probably Japanese) and typical membrane keyboard.
It was possible to use scientific notation and trigonometric functions. The memory was indicated by a dot in the first digit (used also for - sign) and error was shown as "E 00".
Error checking is quite good and it's hard to get unusual results when trying impossible operations.
However, using western components was not suitable in 1981 (quite hard times for Polish economy) and later units used Soviet chips. These are probably remains of Polish-Japanese licensing agreements made in 1970s.
Rear Error condition Inside
PCB bottom 1981 - manufacturing date.  


Elwro 182

Type Scientific desktop
Display: VFD, IW18
Keyboard: Membrane
Chip: K145IK1301
Display driver: Transistor-resistor
Additional parts: DEG/RAD switch
Operations: +, -, /, *, sqrt, x^2, trigonometric, engineering format, memory, [(, )], powers, logarithms.
This calculator gives more functions useful in mathematical operations, engineering number format, memory, brackets and trigonometric functions. Built using eastern components. My unit is manufactured in 1983 and it still works.
Keyboard Numbers Engineering format
Error after division by 0. Rear plate Inside
Chips VFD drivers