Texas Instruments TI-30 III
Brief History
TI-30 introduced in 1976 became very popular because of its low price and functionality. Replacement models TI-30 LCD, and TI-30-II has very unreliable keyboards, which were used widely in Texas Instruments calculators at this time, so new technology was bought for them from japanese Toshiba, which has high quality and cheap rubber membrane keyboard mechanism, and new models were developed using this technology: TI-30-III was in production from 1984. This calculator as TI 30 were produced with Texas circuits to the 1990s.
| Manufacturer: | Texas Instruments (USA/Taiwan) |
| Mfg. date: | 1984 |
| Size: | 7,1×13,4×1,1 cm |
| Weight (ready for operate): | n.a. |
| Type: | scientific |
| Capacity: | 8/5+2 digits (input/display) 11+2 digits (internal precision) |
| Operating logic: | AOS |
| CPU: | Texas Instruments CD4565ANL |
| Registers: | 3 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: | 9 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. 60.019845215 exponential:result of 0.999160000, reference value (first 14 digits): 3.0068804206375×10-70 3.0069206E-70 |
TI-30 III
Inside of the TI-30 III
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