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Low-Cost Glucose Meter Demonstration

Diabetes mellitus is a growing worldwide health problem. Fortunately, the availability of modern glucose meters enable quality diabetes patient care. Glucose meters measure the amount of glucose in the blood, so patients can make decisions about taking necessary medications.

The low-cost glucose meter demo from Microchip uses the amperometric method for measuring blood glucose content.

The Microchip low-cost glucose meter demo was implemented using the PIC16LF1786 microcontroller. The features of the PIC16LF1786 integrated measurement engine are:

eXtreme Low-Power operation (XLP)

Two operational amplifiers (OPAMP)

8-bit digital-to-analog converter (DAC)

12-bit SAR analog-to-digital converter (ADC), up to 11 channels

Integrated EEPROM

I2C/SPI

PWM

The analog front end is embedded in the PIC16LF1786 and utilizes two op-amps, a precision ADC, and an accurate voltage reference. An integrated 8-bit DAC is used to properly bias the sensor. The demo board's Real time Clock and Calendar (RTCC) is used to record the measurement time stamps and the internal EEPROM stores up to 32 readings for later reference. Microchip's eXtreme Low Power (XLP) technology used by this family of devices helps to achieve the low power requirements for this fully integrated glucose meter demo.

PIC16LF1786 Glucose Meter
This demo is a fully-functional glucose meter demonstration design with examples of firmware that calibrate and analyze one specific type of test strip. However, Microchip’s customers will need to use their own test strip design in order to take a final glucose meter design to production.

Microchip cannot supply their customers with test strips. In order to properly utilize this design, the customer must have the ability to design their own test strips and to write the section of calibration and analysis firmware that is applicable to their specific test strip design.

Demonstration Highlights

All features driven by a single device – PIC16LF1786 microcontroller

Glucose measurement range - 20 mg/dl to 600 mg/dl

RTCC uses an internal timer for time stamp

Internal EEPROM for storing 32 readings

Temperature and battery voltage sensing

Push buttons for user interface

LCD displays glucose content and other messages

Resources

Downloads

PIC16LF1786 Glucose Meter Application Note

Free Schematics

Free ‘C’ Source code

Related Pages

PIC16LF1786 Product Page

Medical Design Center

Contact your local sales representative to see a working demonstration of the Low Cost Glucose Meter demo.

This reference design helps to develop a low cost/low power handheld, portable or wearable glucose meter with a user interface for everyday use.*

Glucose Meter Diagram

Glucose Meter Block Diagram

PIC16LF1786 XLP device with internal OPAMP, ADC, DAC and EEPROM

Development Made Easy

Start with the FREE download of the schematics and 'C' source code that can easily be modified to your specific application needs.

*Microchip reference designs and demos are intended only for evaluation and development purposes. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use.

PIC16LF1786 Video