Embedded Files
Objective:
To learn to use an ultrasonic sensor and MakerBit code extension to enable the robot to autonomously avoid obstacles
Add Advanced--->Extensions----->MakerBit
Wiring:
Wiring:
Vc(Red) to 3V Bus ( or 4.5V- many sensors need more than 3V to work)
Vc(Red) to 3V Bus ( or 4.5V- many sensors need more than 3V to work)
Gnd(Black) to Gnd Bus
Gnd(Black) to Gnd Bus
Trigger(Yellow) to P5
Trigger(Yellow) to P5
Echo(White) to P9
Echo(White) to P9
Below: Add extension for Ultrasonic Sensor: Extensions---->Makerbit-ultrasonic----->Add Extension
Below: typical wiring for ultrasonic sensor- red is power, black is ground
Below: typical wiring for ultrasonic sensor- red is power, black is ground
Note: Ultrasonic sensor is sensitive to battery voltage- may not work if 3V battery is low- use 3.3V ( 3- AAA batteries)
Note: Ultrasonic sensor is sensitive to battery voltage- may not work if 3V battery is low- use 3.3V ( 3- AAA batteries)
Test Program for Sensor:
Test Program for Sensor:
Challenge: Program your robot:
Challenge: Program your robot:
Loop:
Loop:
- Go forward
- If object detected(Distance< 15 cm)
- back up for one second
- and turn for one second
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