Sharp EL-506D
Brief History
The next member in the Sharp’s EL-506 series, the EL-506D (and the EL-556D), appeared in 1990. The manufacturing lines was moved to Taiwan and Thailand, and due to cost-effectiveness, new plastic housing was designed, and cheap two-sided PCBs was used. These machines could not be disassembled, repairs are almost impossible. The novelty of the D series was the dot matrix portion on the left side of the display, which was able to display the last pending operation and other information during the calculations. It has built-in storage for constants and conversion factors, and has been extended with integral calculation and six kinds of regression modes.
| Manufacturer: | Sharp Corporation (Japan/Taiwan) |
| Mfg. date: | 1990-91 |
| Size: | 6,9×12,7×0,9 cm |
| Weight (ready for operate): | 60 g |
| Type: | scientific |
| Capacity: | 10+2 digits (input/display) 12+2 digits (internal precision) |
| Operating logic: | algebraic with precedence |
| CPU: | Sharp LI3308 |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 15 bracket (with saving the pending operation) 8 memory (with aritmetic) |
| Features: | %calculation with percent +/-change sign (direct entry of negative numbers) RVexchange registers (X-Y) Ffloating-point notation Fixfixed-point notation: the listed decimals can be chosen (0-9) Sciscientific (exponential) notation Engengineering notation BSbackspace (right-shift) function Sqrsquare root x2square pivalue of pi (3.1415..) can be recalled 1/xreciprocal trigtrigonometrical functions (sin, cos, tan and inverses: arcsin, arccos, arctan) hyphyperbolic functions (sinh, cosh, tanh and inverses: ar sinh, ar cosh, ar tanh) DMS-DDconversion of decimal and sexagesimal numbers logexponential and logarithmical functions (10- and e-base) yxraising to power SDone variable statistics: calculating mean and standard deviation LRtwo-variable statistics: linear regression nCrprobability calculations P-Rconverting coordinates between rectangular and polar systems n!factorial |
| Display: | 10+2+2 digit LCD |
| Power: | 2×LR44 button cell |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.000000699 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00688090276E-70 |
EL-506D
Inside of the EL-506D
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