Sharp EL-506A
Brief History
The new member of the Sharp’s EL-506 family was introduced in 1986. The EL-506A and its equivalent, the EL-556 had 10 + 2-digit capacity, two independent memory registers, engineering display mode, and was capable of combinatorial calculations, logical operations, and can solve 3-variable equations. In its design, the same process can be seen as for its predecessor, the EL-506P: first it was made with a flexible PCB and later with a specially packaged chip.
| Manufacturer: | Sharp Corporation (Japan) |
| Mfg. date: | 1986-87 |
| Size: | 6,9×12,7×0,9 cm |
| Weight (ready for operate): | 73 g |
| Type: | scientific |
| Capacity: | 10+2 digits (input/display) 12+2 digits (internal precision) |
| Operating logic: | algebraic with precedence |
| CPU: | Sharp LI3306AF |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 15 bracket (with saving the pending operation) 2 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 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. 60.0000006699 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00688090276E-70 |
First version of EL-506A
Inside of the EL-506A (version 1)
Display and keyboard of the EL-506A (version 1)
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