DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments SR-11 Version 1
| Date of introduction: | September 11, 1973 | Display technology: | LED modules + lens |
| New price: | $119.95 | Display size: | 8 + 2 |
| Size: | 6.3" x 3.1" x
1.5" 158 x 78 x 38 mm3 |
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| Weight: | 9.2 ounces, 262 grams | Serial No: | |
| Batteries: | 3*AA NiCd | Date of manufacture: | wk 16 year 1974 |
| AC-Adapter: | AC9200, AC9130 | Origin of manufacture: | USA |
| Precision: | 8 | Integrated circuits: | TMS0602 |
| Memories: | |||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 5.2M Bytes) |
The
SR-11 calculator added a constant-switch and PI to the wedge shaped predecessor SR-10.
More notable was the new layout of the keyboard, with the SR-11 Texas
Instruments introduced the smaller keys known from todays calculators. Compared
to later models the keyboard was colorful arranged, the last calculator with
blue and orange keys was the SR-50.
The
inside view of the SR-10 and its successor SR-11 look very similar, compare them
yourself.
The
display of this early SR-11 makes use of two LED-modules (Light Emitting
Devices) known already from the Datamath
calculator, the later SR-11 changed the construction
to 12 discrete LED-modules.
Recently a SR-11 manufactured in Spain was discovered.
It took 12 years and a similar scientific calculator with just the 1/x, x2, sqr(x) and PI keys appeared, don't miss the rare TI-18 SLR.
Press the X-RAY button and view the
internals of a late SR-11.
(Pictures provided by Edward Soudentas)
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.