The TI-30X is a scientific calculator manufactured by the Texas Instruments Corporation in approximately 1994. There were two main versions of this model, one that received power from batteries and the other from solar cells. This is the battery-powered version with Automatic Power Down (APD) feature which conserves power. During its introduction, its features boasted a new constant memory, which retained its contents even after switching OFF the calculator.
The TI-30X SOLAR was identical except that it did not have the constant memory feature which required continuous power to the circuits.
Texas Instruments make some of the best calculators, and the TI-30X became an extremely popular line of scientific calculators that many will remember.
This pocket-sized calculator measures 0.7 inches × 3.0 inches × 5.8 inches, and weighs 0.3 lbs.
The liquid crystal display (LCD) is clear and has good contrast. It can display a 10-digit mantissa and 2-digit exponent.
As you can see from the keyboard, it has some very useful powerful functions for a calculator of the 90s period.
This is a membrane keyboard, and the keys have a soft rubber feel, which is better than hard plastic.
Cost / eBay
This was a mass produced product, which remained into production for many years. It is a nice bit of 90s history and for many it will have a sentimental value. On its own without the box, it might be worth a few pounds. One in mint condition might bring a packet on a good auction day, as there are always collectors out there.
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Texas Instruments TI-30X Scientific
TI-30X PCB & Calculator Chip
TI-30X Rubber Keys
TI-30X Protective Case