SunFounder GalaxyRVR Kit for Arduino, Release 1.0
3.7.2 Materials Needed
• Ultrasonic Module
• Basic tools and accessories (e.g. screwdriver, screws, wires etc.)
• Mars Rover Model (Equipped with rocker-bogie system, main boards, motors, obstacle avoidance module)
• USB Cable
• Arduino IDE
• Computer
3.7.3 Course Steps
Step 1: Assemble the Ultrasonic Sensor Module
Now that we’ve got our eyes set on equipping our Mars Rover with a powerful new sense of “sight”, it’s time to put
together the ultrasonic sensor module.
And there we have it! Our Mars Rover now has a fully-assembled ultrasonic sensor module, ready to help it navigate
like never before. Are you excited to see how it changes our Rover’s obstacle detection abilities? Let’s dive right into
it!
Step 2: Exploring the Ultrasonic Module
Let’s get to know the HC-SR04, a powerful ultrasonic distance sensor. This tiny device can accurately measure distances
from 2 cm up to 400 cm, all without touching a thing! Amazing, right? It’s like having a superhero power! It can “see”
the distances just by using sound waves, like how a bat navigates at night.
It uses four superpowers, or rather, four pins to do its magic:
• TRIG (Trigger Pulse Input) - It’s the start button for our superhero. It tells our superhero, “Hey, it’s time to
send out a super sonic wave!”
• ECHO (Echo Pulse Output) - This is how our superhero listens to the echo of the sound wave it sent out.
• VCC - Even superheroes need some energy. We connect it to a 5V power supply.
• GND - It’s the ground connection. Just like how superheroes need to stay connected to reality!
60 Chapter 3. Course Mode
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