Levis
Brief History
Electronic devices branded „Levis”, most notably made in Taiwan and Hong Kong, appeared in the 1980s were very common in Europe. The vast majority of their calculators looked like clones similar to the Sharp EL-506H/EL-506P. This programmable version’s manufacturer shown here is unknown. Interestingly, the chip was made and marketed by Sharp himself, but the company never build a calculator with it. The Levis clone is basically good quality, but unfortunately the labelings on the keys wear off quickly.
You can read more about clones in this article.
| Manufacturer: | Levis (ismeretlen) |
| Mfg. date: | 1985 |
| Size: | 6,9×12,8×0,9 cm |
| Weight (ready for operate): | 61 g |
| Type: | programmable scientific |
| Capacity: | 10/8+2 digits (input/display) 12+2 digits (internal precision) |
| Operating logic: | algebraic with precedence |
| CPU: | Sharp LI3301A |
| Registers: | 2 standard (with saving the pending operation) 1 constant (with saving the pending operation) 7 bracket (with saving the pending operation) 3 memory (with aritmetic) |
| Features: | +/-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 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 n!factorial |
| Display: | 11+1 digit LCD |
| Power: | 2×LR44 button cell |
| Programming method: | merged keystroke-programmable |
| Program capacity: | 40 steps |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.00000545 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.006880906E-70 |
Levis
Inside of the LEVIS
Keyboard and display of the machine
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