DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Garrett 2002
| Date of introduction: | 1972 | Display technology: | Panaplex II |
| New price: | $149.50 | Display size: | 8 |
| Size: | 10.0" x 5.5" x 2.25" | ||
| Weight: | 2 pound 8 ounces | Serial No: | 009221 |
| Batteries: | Date of manufacture: | year 1973 | |
| AC-Adapter: | 115 V | Origin of manufacture: | USA |
| Precision: | 8 | Integrated circuits: | National Semiconductor MM5724, MM5317 |
| Memories: | |||
| Program steps: | Courtesy of: | Joerg Woerner |
This early
calculator-clock combo was manufactured early in 1973 by Garrett Comtronics Corporation of
San Diego, CA. A subsidary of the Garrett Corporation, one of the Signal Companies.
Removing
the wonderful wooden shell of the calculator reveals a high sophisticated
construction with a stack of two printed circuit boards (PCB's). The display is
a standard Panaplex™ II type driven by discrete transistors. The switches and
keys are high quality types.
Below
the keyboard assembly we'll notice immediately the famous National Semiconductor
MM5317 single-chip clock circuit instead the Mostek MK5017 and MM5314 found in
the Corvus 305 resp. TI-3510.
The calculator circuit is an uncommon MM5724, probably a customized circuit.
The
back side of the calculator demonstrates the easy setting of Time, Date, Alarm,
and Timer with the calculator keyboard instead the two simple push-button
switches known from competition.
The 5 black switches above the keyboard select the main
function of the Garrett 2002:
CALC:
Normal calculator function.
CLOCK:
Reads the time in hours, minutes and seconds.
INT:
Counts down in hours, minutes and seconds.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, September 25, 2003. No reprints without written permission.