MamaRobot competition kit (class kit) installation guide
Class kit contents
- 1 big robot pad - compatible with RoboTraffic competition pad
- 1 Controller for programming the traffic lights
- 1 USB cable
- 4 programmable infrared traffic lights transmitters
- 2 light sensors - used as infrared receivers
- 1 cable braid containing 4 cables
- 2 traffic light posts 25cm height
- 2 traffic light posts 26cm height
- 2 traffic light mounting (long) poles
- 4 traffic light adapters
- 4 short poles 10cm
Configuring the class kit
These are the mechanical parts in the kit:
First, deploy the big competition pad on the floor, while attaching its ends to the floor (use a cellotape if needed). Now do the following in order:
Position the 4 traffic light posts at marked positions, 1 to 4.
Please note that one traffic light posts pair is one centimeter higher than the second pair. Position the lower pair at positions 1-3 and the highest pair at positions 2-4.
Place one mounting pole on top of the traffic light posts at positions 1-3. Push it down so until it clicks in.
Place the second mounting pole on top of the traffic light posts at positions 2-4, over the previous pole. Push it down until it clicks in.
Hang the four traffic light sensors on the mounting poles, according to the indicated transmission direction.
Place the controller and battery at position no. 1 at the marked place.
Connect the controller cable braid channels according to their numerical order:
Twist the cable braid around traffic light post no. 1, and then around the mounting pole.
Connect cable no. 1 to light sensor at position 1.
Similarly, plug cables 2,3 and 4 to the corresponding traffic light sensors. Make sure the cables are no too low, by twisting them around the poles, so that they don't block the robots.
Place two light sensors at the bottom of the robot for tracking the path.
Place two light sensors in front of the robot, turned slightly upward. These sensors will be used to receive the traffic light signals (we use two sensors to ensure the reception of the infrared signal).
Tune the light sensors using the blue button. The light sensors directed to the ground should be tuned to separate the value of a black line from the bright surface, and light sensors directed to the traffic lights should be tuned so that the red led will be on only when the traffic light is red.
Note: For tuning, you can remove the sensor from the hanging pole and bring it manually to ground or to the traffic light to perform the calibration.
When red light is on, the transmitter (translucent led to the left of the green light) is turned on, and the sensor receives it as a value "1". It is not visible to our eyes, but using a cellphone camera pointed to it we can see it shining.
When the robot on the track is facing a red light, its sensors receive the signal transmitted by the transmitter. Therefore, the robot has to check - in addition to the black route deviation check - whether it is a red light, then it must stop until the traffic light becomes green.