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The joystick board for the powered wheelchair

Part-financed by the European Regional Development Fund. The joystick board for the powered wheelchair. Jean-Marc Capron ISEN September 30 th 2011 University of Kent. b. joystick. m C ATMEL ATmega328. quad DAC. to original system. ADC 10 bits. I2C. joystick module. SPI. PC.

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The joystick board for the powered wheelchair

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  1. Part-financed by the European Regional Development Fund The joystick board for the powered wheelchair Jean-Marc Capron ISEN September 30th 2011 University of Kent

  2. b joystick mC ATMEL ATmega328 quad DAC to original system ADC 10 bits I2C joystick module SPI PC sensor 1 mC ATMEL ATmega2560 (ARDUINO or anythingelse) SPI USB UART sensor 2 sensors module sensor n

  3. b joystick mC ATMEL ATmega328 quad DAC to original system ADC 10 bits I2C joystick module SPI actual joystick’s position modified joystick’s position PC sensor 1 mC ATMEL ATmega2560 SPI USB UART sensor 2 sensors module sensor n

  4. joystick module mounted in • the original system

  5. b joystick mC ATMEL ATmega328 quad DAC to original system ADC 10 bits I2C joystick module SPI optocouplers LED visual interface SPI PC sensor 1 mC ATMEL ATmega2560 SPI USB UART sensor 2 sensors module sensor n

  6. Sensorsused on the prototype: • Ultrasoundsensors • 9 implemented (only 4 active at one time) • Advantages: - cheap solution • - long range (typ. 20 cm  5 m) • Drawbacks: - long response time (up to 50 ms) • Infraredsensors • 2 implemented (when passing through a door) • Advantages: - no latencyinduced • Drawbacks: - short range (< 1 m)

  7. details (top view) 59 mm 23 mm 36 mm microcontroler

  8. details (bottomview) connection to sensors module quad digital-to-analogconverter connection to original system connection to joystick

  9. Plan of presentation I. Outline of the task within the context of the project II. Main results III. Future challenges and the work to be done

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