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Blood Pressure / Bathroom Scale
 Working
with Gad Shaanan Designs, an industrial
design firm, the team created a low cost bathroom scale and blood pressure
monitor pair. The scale used an Infra-Red (IR) LED to send data to a
wall mounted display. The battery powered scale uses a low cost
Microchip PIC16C56 to perform a delta-sigma analog to digital conversion, IR
modulation and run-time scale calibration...all in firmware! The
wall unit is based on an Hitachi H8/3027 and is the controller for the blood
pressure monitor and LCD display. The system allowed up to 5 users
to store and graph both their blood pressure and weight over 5 measurement
periods.
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