Sharp EL-530
Brief History
Casio was the only japanese manufacturer which can flood not only the domestic but the world market with its very low-priced calculators. From 1980, really cheap machines were marketed which can be used by students, so other competitors had to create their similar models. Sharp developed some models with limited functionality compared to other calculators: the low-end scientific EL-530 used liquid crystal display with flexible foil PCB and only one specially shaped chip, but can compute only the most important functions. Extremely large amounts can be manufactured of these cheapest calculators so this circumstance made possible to use state-of-the-art technologies.
| Manufacturer: | Sharp Corporation (Japan) |
| Mfg. date: | 1982-84 |
| Size: | 7×14,6×1,9 cm |
| Weight (ready for operate): | 148 g |
| Type: | scientific |
| Capacity: | 8/5+2 digits (input/display) 10+2 digits (internal precision) |
| Operating logic: | algebraic with precedence |
| CPU: | Sharp LI3103F |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 15 bracket (with saving the pending operation) 1 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) Ffloating-point notation Sciscientific (exponential) notation Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) logexponential and logarithmical functions (10- and e-base) yxraising to power n!factorial |
| Display: | 8+1 digit LCD |
| Power: | 2×AA-type battery |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.00028951 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.006881E-70 |
Sharp EL-530
The flexible PCB of the EL-530
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