Power DistributionPower for the controller was provided by a single 7.2V NiCd battery. Two voltage regulators were used to segment this power into a 3.3V supply for sensor logic and 5V supply for powering the Tiva and indicator LEDs. A separate 9V battery was used to supply power to the RGB LED strip within hovercraft select cup.
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Tilt.pdf | |
File Size: | 63 kb |
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Microphone.pdf | |
File Size: | 63 kb |
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Radio CommunicationFor radio communication, an Xbee transceiver was wired to the UARTs lines of the Tiva. A pull-up resistor was used to insure the RX line of the Xbee remained high.
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To display IMU data from the hovercraft, we opted to use an array of 16 LEDs to visualize spin rate in the Z direction. If the bot was not spinning, the green LEDs in the center of the display were illuminated. If the bot was spinning counterclockwise, the left LEDs would incrementally illuminate proportional to the spin rate. Likewise, the right LEDs would illuminate during clockwise rotation. Two daisy chained shift registers were used to individually control each LED.
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HovercraftSelect.pdf | |
File Size: | 44 kb |
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Indicator LEDsAn RGB LED strip was used to indicate the controller's pair status with either hovercraft number 1, 2, or 3, illuminating a different color for each. A power MOSFET was used to control current through the R,G, and B lines of the strip, which was powered via 9V battery.
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This LED is pulsed when a packet is received from the hovercraft that this controller is paired with.
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Battery Calculations (Excel) | |
File Size: | 10 kb |
File Type: | xlsx |