Prinztronic Micro
Brief History
In 1970, Sharp and american Rockwell built the first calculator using LSI integrated circuits (Sharp QT-8 series), but the available technology did not allow to made really small equipments. The first battery-powered pocket-sized calculators in 1971-72 operates only for a few hours. In 1972, Sharp introduced the ELSI MINI (EL-801), which not oly used japanese-made state-of-the-art integrated circuits from Toshiba, but despite of high power consumption LED displays it can be operates from 4 pieces of AA batteries for 15 hours. Rechargeable battery pack were marketed for more economical applications.
A slightly modified, re-designed version were manufactured for british Dixons corporation under the name Prinztronic Micro: it can only be used with standard batteries.
After spreading CMOS technology and finishing development of reliable liquid crystal displays, first calculators with low power consumption were introduced from 1973.
| Manufacturer: | Dixons International (United Kingdom) |
| OEM: | Sharp Corporation (Japan) |
| OEM model: | EL-801 |
| Mfg. date: | 1972 |
| Size: | 7,3×10,4×2,9 cm |
| Weight (ready for operate): | 234 g |
| Type: | four-function |
| Capacity: | 8 digits (input/display) 8 digits (internal precision) |
| Operating logic: | arithmetic |
| CPU: | Toshiba T3103+T1271 |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) |
| Features: | Ffloating-point notation |
| Display: | 8+1 digit LED |
| Power: | 4×AA-type battery |
Micro
Inside of the Micro
PCBs of the Micro: the upper contains the display, the lower is the soul of the machine
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