Instructions Circuit Diagram

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2.6. Add-on kits
You may easily add extra (but non included) modules to the YETI
robot, to allow YETI to do much more. How about adding an ultrasonic
transceiver, allowing YETI to sense the distance to obstacles and avoid
these objects while walking around?
You also may add a display to YETI’s body to show output messages
or data. Add-on kits usually contain a printed circuit board (PCB) and
may be supplied with or without electronic components. The add-on
kitsaremadetotintotherobot’sheadandwillbeattachedtothe
skull just above his eyes.
Of course you may also design your own PCB’s by using the experi-
mental PCB-set. This module will be attached to YETI’s head and will
be located at the tiny roof.
Aatcableisusedtoconnecttheadd-onmodulestothemainPCB
(and to the microprocessor’s I2C bus in the robot’s skull as well), using
an I2C-bus system.