DATAMATH

DATAMATH CALCULATOR MUSEUM

SHARP EL-W535B

Date of introduction:	2007	Display technology:	LCD dot matrix
New price:		Display size:	4 * 16 characters
Size:	6.3" x 3.1" x 0.55" 160 x 78 x 14 mm³
Weight:	3.5 ounces, 100 grams	Serial No:	7D017
Batteries:	LR44	Date of manufacture:
AC-Adapter:		Origin of manufacture:	China
Precision:	14	Integrated circuits:
Memories:	9
Program steps:		Courtesy of:	Joerg Woerner

Casio introduced with the fx-115ES already in 2005 an advanced scientific calculator with a 2-line Natural Textbook Display showing formulas and results exactly as they appear in the textbook. Texas Instruments followed mid-2007 with the TI-30XS MultiView and Sharp joined the group with its EL-W531 series introduced late-2007.

In June 2008 we know nine Sharp calculators sporting the WriteView Display:

Type	Power Supply	Functions	Comments
EL-W531B, EL-W531H, EL-W531HA	AAA battery	335
EL-W531, EL-W535	LR44	335
EL-W531G	Solar + LR44	335
EL-W506. EL-W516, EL-W546	Solar + LR44	556	52 constants, 44 conversions, complex numbers, equation solver, matrix operations

In addition to this so called "WriteView" mode the calculator sports a traditional "Linear" mode.

Dismantling the Sharp EL-W535B reveals a pretty common construction with a single printed circuit board (PCB). The PCB hides the single-chip calculating circuit under a small protection blob of black epoxy and drives the graphing display with a heat sealed fine-pitch connector.

Please compare the Sharp EL-535 with its competitors Casio fx-300ES and Texas Instruments TI-30XS MultiView.

If you have additions to the above article please email: joerg@datamath.org.