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Experimentation is the best way to determine the bemf

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Unformatted text preview: measure the RPM of the motor. Measuring the BEMF voltage while reading the digital tachometer will give a correlation between motor speed and BEMF voltage. Note: Microchip Application Note AN893 provides firmware and circuit examples for reading the BEMF voltage using a PIC16F684. DS00905B-page 6 2010 Microchip Technology Inc. AN905 CONCLUSION Brushed DC motors are very simple to use and control, which makes them a short design-in item. PIC microcontrollers, especially those with CCP or ECCP modules, are ideally suited for driving BDC motors. REFERENCES AN893, “Low-Cost Bidirectional Brushed DC Motor Control Using the PIC16F684“. AN847, “RC Model Aircraft Motor Control”. www.howstuffworks.com www.engin.umich.edu/labs/csdl/me350/motors/dc/ index.html 2010 Microchip Technology Inc. DS00905B-page 7 AN905 NOTES: DS00905B-page 8 2010 Microchip Technology Inc. Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sh...
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