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Elektronika 7
Electronics 7 is a Soviet Russian brand of seven segment industrial digital clocks with four or eleven 7-segment luminicent digits. It had a separate binary to seven segment decoder board for each digit, while the actual timekeeping was done by a main board which emitted the digits of the time as binary code. Most models used Russian made vacuum-fluorescent indicators, but there were also models based on light-emitting diodes . The most common problem with the clocks was that the segments of the display were gradually burnt out after ten or more years of continuous use, causing a significant difference in luminescence between more often and less often displayed segments. All the street and wall clocks were based on a kit by the "Reflector" factory in Saratov and many remain in use at administrative and industrial premises in Russia.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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