Specifications

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Figure 4.15 gives an overview of how the pulsing IR LED, Receiving diode and
variable IR LED are positioned to provide a successful distance sensor.
Figure 4.15: Position of Sensor Components
The Z1955 IR Receiver is mounted onto the torch containing the pulsating IR LED.
This provides an ideal position to pick up any objects located directly in front of the
sensor. A wider sensing range could be created by shortening the outer housing of the
torch or using extra pulsating LED’s concentrating in the desired direction.
The sensors are mounted to point in each possible direction of travel. This includes a
front, left and right sensor. The code is designed to stop the travel of the robot if
anything activates one of the sensors and then perform a task specific to the status of
each sensor. The figure below shows the mounting of the sensors.