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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