NEX ROBOTICS SPARK V ATMEGA16 Hardware Manual page 29

SPARK V ATMEGA16 Hardware Manual
Figure 3.23: Range Shown on 1-foot grid to various diameter dowels
Mounting Ultrasonic range sensors:
Ultrasonic sensors have range of about 5 meters. If sensors are mounted with even slight slanted
angle towards ground then sensor will sense ground few meters ahead as obstacle. If sensors are
mounted on the female berg connectors then because of loose fitting it is possible that they will
get slanted and detect few meters ahead ground as obstacle. Hence these sensors have to be
soldered on the main board and bend in such a way that they look slightly upwards.
3.11 White Line Sensor
White line sensors are used for detecting white line on the ground surface. White lines are used
to give robot sense of localization. White line sensor consists of a highly directional IR photo
diode for line sensing and IR LED for the illumination. Due to the directional nature of the
photodiode it does not get affected with ambient light unless it is very bright.
Figure 3.24: White line sensor
© NEX Robotics Pvt. Ltd. and ERTS Lab IIT Bombay, INDIA 29