Quiz Answers | Path Finding Robot | Age 7-9
11,3
Let’s say we connected an Infra-red (IR) sensor to pin number 2. What is value going to be on pin number 2 when the sensor is close to a BLACK coloured wall?
1 or HIGH
Explanation – Black is a good absorber of light even if the black wall is in front of the sensor, the black colour will not reflect the light back and sensor will have the value HIGH.
Suppose you are making an autonomous robot for a competition. There are two members in your team, you and your team-mate. For the entire duration of the project you worked on the coding part of the robot and your other teammate worked on the circuits. On the final day of the competition, your team-mate is not able to make it for the demonstration. You are required to plug in the main power chords of the robot. You see two wires red and black coming out from the main power supply(battery box). Which wire would you connect to the positive terminal? Red or Black?
Red
Explanation – red is always going to be the positive or live wire
This question requires you to write code. Connect an LED to pin 5 and 6. The ultrasonic sensor gives us the value of distance. Using the distance from the ultrasonic sensor, make the LED blink faster or slower. For example, if the distance from the ultrasonic sensor is 100cm the LED blinks with an interval of 1 second, as the objects start to come closer to the sensor the LED starts to blink faster.
Try to 柠檬视频 your robot to follow the black line. The hint is hidden inside number 3. To do this we need to set the sensors facing the ground.
