Truly 101
Brief History
As a copy of Sharp’s hugely successful EL-506H (1981) and its successor, the EL-506P (1984), a wide variety of clones and fakes have been made since the mid-1980s. After making the "replacement circuit" for the original Toshiba SC6992 chip, Samsung was able to sell that in large numbers to companies in Hong Kong and Taiwan that produced countless versions of the EL-506P clones. Hong Kong company Truly was founded in 1979 and manufactures almost all types of calculators. Type 101 scientific calculator was made with a different color scheme than the original but with same button labels and arrangement in better quality.
Later, a newer version was made under the model name 101A with different color scheme and display.
You can read more about clones in this article.
| Manufacturer: | Truly Electronics Manufacturing Ltd. (Hong-Kong/China) |
| Mfg. date: | n.a. |
| Size: | 6,9×12,7×0,9 cm |
| Weight (ready for operate): | 58 g |
| Type: | scientific |
| Capacity: | 10/8+2 digits (input/display) 12+2 digits (internal precision) |
| Operating logic: | algebraic with precedence |
| Registers: | 2 standard 1 constant 15 bracket 1 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 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 P-Rconverting coordinates between rectangular and polar systems n!factorial |
| Display: | 11+1 digit LCD |
| Power: | 2×LR54 button cell |
| Test results: | trigonometry:result of sin-1(cos-1(tan-1(tan(cos(sin(60°)))))), reference value: 60. 60.0000010291 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.00688042113E-70 |
Truly 101
Inside of the Truly 101
Display and keyboard of the Truly 101
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