NEX ROBOTICS SPARK V ATMEGA16 Hardware Manual page 28

SPARK V ATMEGA16 Hardware Manual
Figure 3.21: Pads for bypassing particular Ultrasonic range sensor
Figure 3.22: Ultrasonic Range Sensor interfacing and jumper settings
If you want to install only one ultrasonic sensor, say sensor number 2 or 4 then you need to short
the pins "TX" and "RX" of the sensors which are connected in the daisy chain before the sensor
which is installed so that trigger from microcontroller can reach the installed sensor. Figure 3.21
area marked by red border shows pads corresponding to the particular sensors which are labeled
as P1, P2 and P3 corresponds to sensor numbers.
For example if you want to use only sensor number 2 then you have to short pad corresponding
to sensor 1. If you want to use sensor 4 (connector marked by sensor number 4 in the figure
3.19), then you have to short pad number 1, 2 and 3.
Supported Ultrasonic range sensors
Spark V robot supports EZ0 to EZ4 sensors from MaxBotix. All these sensors are available on
NEX Robotics website. Other sensors from MaxBotix having compatible pin mapping can also
be used instead of these sensors. For more details on compatibility, refer to the respective
sensor's datasheet.
EZ0 to EZ4 sensors have progressively more directionality. Refer to figure 3.10 to get rough idea
of the sensor characteristics.
© NEX Robotics Pvt. Ltd. and ERTS Lab IIT Bombay, INDIA 28