DATAMATH CALCULATOR MUSEUM
|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|
|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.
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.
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© Joerg Woerner, September 25, 2003. No reprints without written permission.