AN899 MICROCHIP PDF

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This page was last modified on 23 Marchat The current code cannot be read because the “Code Protect” bit has been set, but it is possible to erase the chip and program it with new code. The Roth motorboards na899 speed of 18mph translates to optical pulses per second.

The motor makes approximately Navigation menu Personal tools Create account Log in. When the battery is almost dead, the red light will blink and the buzzer microcnip the motor contoller PCB will beep on and off 1 second on, 4 seconds off until the battery reaches the low power shut off.

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Actually it operates at Hz measured. Then the operator pushes to go.

PIC18F4331

This prevents power from being applied to the motors until they are at least rotating at microchlp. One turn of the wheel is at best inches The motorboard has an automatic low power shut off. The controller monitors the speed of one of the motors the one with a optical wheel “chopper” attached to an elongated motor shaft.

Retrieved from ” http: The motorboard will not function and there will be no indication mirochip to the cause of failure.

When the battery gets microchjp low, the RED light will illuminate. Privacy policy About Motorboards Disclaimers Mobile view. If the speed of this motor is less than 3mph, no power will be provided to the motors.

When you turn the motorboard ON, the green light goes on then off, then the yellow light goes on then off then the red light goes on then off and then the green light goes on solid. Because there is no indication that the motor is moving less than 3mph, if the optical wheel fails for any reason the motorboard will assume that 3mph has not yet been reached.

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Motorboard Controller Source Code (Open Source) – Motorboards

The speed is controlled linearly, and no attempt is made to maintain a given speed for a given throttle position. Views Read View source View history. Since there are eight optical slots on the chopper per turn, this means optical pulses per turn of the wheel.

This saves significant amounts of battery power and prevents the motorboard from starting accidentally. If low power is detected the red LED will blink, and power will be shut off completely.