By the end of this checkpoint, you will have built a simple motor drive circuit, and interfaced your microcontroller with the motor driver and steering servo.
Checkoff requirements
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Demonstrate CPU speed control of a motor (single direction)
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Turn off / on at 50% duty cycle
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5-second stall (100% duty cycle) using benchtop supply, measuring temperature of driving MOSFET
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Demonstrate CPU servo control
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Power from benchtop supply
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Turn front wheel left / right / center using keyboard commands or similar
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Parts handed out
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3 MOSFETs
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1 MAX620 high side driver IC
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1 IC socket for MAX620
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1 Flyback diode
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Heatsink
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Motor & servo (as needed)
More to come… |