RALPH

built by Terence Scott

*
Target Environment Locomotion Method
Indoors 4 Wheels
Sensors / Input Devices Actuators / Output Devices
microphones
bump sensors
IR proximity detectors
Ultra-sonic range finders
Votrax-based Speech
Vacuum cleaner
two arms
DC motors in base
Control Method Power Source
Autonomous Battery
CPU Type Operating System
Commodor 64 motherboard N/A
Programming Lanuage Weight
BASIC N/A
Time to build Cost to build
approx. 5-6 years and still going around $600AUD
URL for more information
N/A
Comments
RALPH (Remote ALl Purpose Helper), comprises of three movable sections. (a) Mobility Base - housing 2 x 12V 7Ah batteries, 2 x 12V Geared Window-winder Motors, Bump sensors. (b) Body - housing a modified Commodore 64 Motherboard, Sensor Interfacing pcbs, Debugging LEDs, Shoulder motors for both arms. (c) Head - rotates in the direction of any sound, utilising 2 microphones on either side of the head. Ultra-sonic and Infra-red Sensors allow for obstacle avoidance. Phonetic speech capabilities are possible using the Votrax Chip, interfaced to the C64 CPU board. Pulls a Vacuum Cleaner around a pre-programmed path. The arms are used to hold a serving tray during parties. Email: terry_scott@gilbarco.com.au

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