🤖🚗 13. Light sensors in Open Roberta Lab

Step 1: 🚀 Start Your Project:

• Once the page is open, look for “Choose your system.”
• Select “Open Robot Sim” and click on it.

Step 2: 🎚️ Set Variables:

Click on the variable section four times to create four variables.

Name them:

• Error
• Gain
• Steer

Light Target:

• Step 3: 📝 Enter Values:
• For ‘Gain’, enter the value 10.
• For ‘Light Target’, enter the value 50.
• Step 4: ⚙️ Set Up Actions:
• Go to the action block and select “drive forward.”
• Then, go to the control block and choose “repeat identity T.”
• Step 5: 🛣️ Program the Drive:
• In the drive block, set the drive speed to 60.
• Use the variable block to set errors, then go to the math block to adjust the values.
• Choose the light target from the variables and subtract it from the sensor block’s light sensor value.
• Step 6: 🚏 Adjust Steering:
• Set steer using the variable block.
• Choose a math block and add the error variable.
• Multiply it by the gain you set earlier.

• Step 7: 🧭 Finalize the Direction:
• Go to the action block, select “right,” and adjust the value.
• Replace it with the steer variable from the variable block.
• Step 8: 🎮 Simulate and Test:
• Click on the simulation view button.
• Change your background to show red and green lights.
• Start your program and watch your robot react to the green and red lights. When it’s green, the robot moves; when it’s red, it stops.
• Step 9: 👀 Observe and Learn:
• Watch how your robot navigates towards the green light and avoids the red light.
• See how changing the values affects the robot’s behaviour.

🎉 Congratulations!

You’ve successfully programmed a robot in Open Roberta Lab to respond to red and green lights. Great job! Remember, if you get stuck or something doesn’t work, don’t worry! Ask an adult or a friend for help, and keep trying. Learning to program is all about experimenting and solving problems. Good luck! 🤖💖