Datasheet

Construction manual - Robot kit NIBO burger 08.09.2015
1.2.2 Motor bridge
The motor bridge is needed for current amplification and for voltage regulation
of the microcontroller signals. The motor is controlled by one of three possible
signal-combinations from the H-bridge: high/low (forward), low/high
(backwards), high/high (short-circuit). The short-circuit operating (freewheel)
is for better utilization of energy with PWM-control, since electricity does not
have to flow against the supply voltage in this case. Additionally the freewheel
stabilizes the torque for lower values.
It is possible to deactivate the motor bridge by removing the jumper J4
(Mot) for test cases.
1.3 Sensors
The robot is able to learn and to react on environmental conditions by its
sensors. The following subsections describe the sensors in detail:
1.3.1 IR sensor bricks
The robot has four IR sensor bricks to detect objects / obstacles contact-free.
Each sensor brick consists one IR phototransistor and one IR led. So the
reflection factor can be measured and interpreted. To avoid the influence of
http://nibo.nicai-systems.de 10
J4 - motor-jumper