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Calculators: Handheld: Sharp Elsimate 8117K
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Size (approx): |
76mm x
128mm x 20mm (w,h,d) |
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Power: |
3V DC using 2 x AA size batteries. It accepts an adapter/charger (3V DC 0.5W EA-17E) through a socket (centre negative) on the top side to the far left. It recommends that you use rechargeable batteries EA-18B. The on/off switch is on the left hand side in line with the Sharp logo and sits within its own recess. | |
| Case: | The base is a “u-shaped” smooth white plastic whilst the front section is matt dark brown plastic. The green plastic display filter sits flat and slightly proud. It gives a bright image and is surrounded by a large metallic gold panel. The panel is printed black and red with designer lines, brand and model number. The keys are squishy with a soft click and work well to this day. A metallic sticker on the lower edge states Made in Korea. There is a small lug on the left hand side, at the top, for a carry strap. | |
| Display: | 8 digit green VFD with a ninth digit for negative, error and memory indicators. | |
| Features: | Standard four functions with percentages, square root and four-function memory. | |
| Age: | 1977 | |
| Manufacturer: | Sharp Corporation, made in Korea, serial number 78028207 is on a sticker inside the battery compartment. | |
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Comments:
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Standard Sharp design which is compact and sturdy with a good bright display and sound logic. It is only let down by negative square roots. The original case is soft black plastic with open top and Sharp embossed on the front and Made in Korea on the back. |
| Components: | 1 x cpu; Texas TMS1042NL KDS
7642 (week 42 of 1976), 28 pin DIL, 0.6" width 1 x 9 digit VFD single unit flat fronted; Futaba 9-ST-12 7G, made in Korea (date code July 1977?) 1 x transistor 4 x diodes 6 x capacitors 4 x resistors 1 x transformer; 1413 |
| Boards: | The keyboard assembly is attached to the front by one screw and has ID number F1234CC. That one screw can be accessed through a hole in the main board. Main CPU board is hinged off with a 12-way connecting ribbon of stiff wire and centred using a plastic post. The ID mark is F1447. |
| Construction: | Front panel can be prized away by lifting the lugs in the battery compartment and then gently separating two similar lugs at the bottom. For some reason (anti-static?) there is a foil strip on the inside of the back, which is connected to the negative line. |
| Logic comments: | (C/CE) clears the last number entered whilst a second press clears the whole calculator |
| Input overflow is suppressed, inputting a ninth digit is ignored | |
| Negative numbers are shown with a minus in the far left (ninth) digit thereby allowing full eight digit negative numbers. | |
| There is automatic constant on all four functions | |
| Divide by zero shows zero and “C” in the far left (ninth) digit and is recoverable using (C/CE) | |
| Overflow shows the result and “C” (“E” if negative”) in the far left (ninth) digit and is recoverable using (C/CE) | |
| Memory store is indicated by an upper “n” in the far left (ninth) digit | |
| Negative square roots are allowed and result in a negative number |
