built by Paco Carabaza

Target Environment Locomotion Method
Indoors 3 Wheels
Sensors / Input Devices Actuators / Output Devices
2 infrared photodiodes DC motor controller
Control Method Power Source
Autonomous Battery
CPU Type Operating System
Programming Lanuage Weight
Time to build Cost to build
two evenings none
URL for more information
This robot is the turn out to take advantage of the mechanics of two old walkmans and a few electronic components obtained from remainder Personal Computer devices, with the aim to demonstrate that sometimes, is not necessary to include a computer in a robot to make a relatively complex task. Functions: This device is able to follow a line drawn up in the ground. Specifications: It has two type H bridge DC motor controllers, two infrared sensors, made with infrared photodiodes and leds obtained from a PC mouse, and a series of logical trigger schimitt inverter gates to adapt the levels of voltage from infrared sensors, to adapt the ambient light level. It does not have computer, because it uses a direct electric logical to make his task. Problems encountered: When using the mechanics of two walkman, to equip steer, and to have very little reduction, was necessary to cause that at the moment for giving voltage to the motors to advance, it was made to pulses to reduce the effective value, to avoid line skip. Time for the construction: Two evenings. Cost: When being constructed with remainder pieces the cost he was almost null. Email:

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