New Stuff
Author
Links
Guest book
Web-log
Bric-a-brac
Calculators
Components
Ephemera
Events
Glossary
History
Hit or Miss
Radios
Transport
Valves
Wanted
Metal Puzzles
Caravan
Calculators: Handheld: Texas Instruments TI-30
|
|
Size (approx): |
80mm
(max) x 145mm x 35mm (max) (w,h,d) |
| Power: | 9.0V DC, 1 x PP3 size battery. Also accepts adapter/charger through a right side socket in the middle. | |
| Case: | Two-piece matt black plastic case with gold brushed metal keyboard surround. Red plastic display filter is sloped inwards and highlighted with a gold painted escutcheon. The keys are labelled in blue or black and sectioned with two shades of gold paint. Classic bow shaped Texas. | |
| Display: | 8 digit red LED display with bubble lens - ninth used for minus sign and decimal point. | |
| Features: | 17 scientific functions and two digit exponent. Pi and flexible memory system. Front key to toggle on/off. | |
| Age: | 1980 | |
| Manufacturer: | Made by Texas Instruments Incorporated. Made in the USA. Serial No. 0485324 | |
| Comments: | Lovely to watch complex calculations light up the first digit segments. Robust logic and nice clicking keys. Other version were available with different keyboard surround colours. |
| Components: | |
| Boards: | |
| Construction: |
| Logic comments: | The Clear key (ON/C) is used to once to clear an input number a second press clears the calculator |
| Overflow on the input of a number is suppressed | |
| The constant function is selected by the (K) key | |
| The negative sign is shown on the immediate left digit, pushing into the ninth to allow 8-digit negative numbers | |
| Goes into power save mode after about 30 seconds - a travelling decimal from left to right reminds you | |
| Errors result in the word "Error" being displayed, these are not recoverable. | |
| You can type in eight digit decimals as the decimal point travels into the ninth digit. | |
| There is no memory indicator - you have to remember it. | |
| There appears to be 9 digit precision, try this; take 0.99999999 (square root twice) which shows "1". Then (-)(1) which gives -4 x 10 [-9]. |
