In this lesson, we will demonstrate how to connect the H-Bridge (motors) to your EZ-B v4. The H-Bridge is special type of IC (integrated circuit) which converts low voltage power from the EZ-B pins to the DC motors that drive the tracks. You will find HBridges in any device that uses DC Motors. This is because MicroControllers or Micro Processors (such as the EZ-B) cannot provide current to power DC motors directly. The HBridge is located inside the body of Roli. This lesson will connect the wiring harness from the HBridge to the EZ-B v4.
What You Will Need
- A PC with latest EZ-Builder Installed
- An Assembled Roli
Locate the H-Bridge wiring harness.
Before we can connect the wires to the EZ-B, place your EZ-B into Roli.
Connect the wiring harness to your EZ-B according to the following instructions...
D0 - Green (Left PWM)
D1 - Blue (Left Trigger A)
D2 - Purple (Left Trigger B)
D3 - Grey (Right Trigger A)
D4 - White (Right Trigger B)
D5 - Black (Right PWM)
Red & Black Wires
Connect the power from the EZ-B to the HBridge. The power wires are the two Red & Black wires from the HBridge. They will connect to the matching Red and Black pins of the D0 Port. Consult the photo above to see how the Red and Black wire are connected to the matching Red and Black pins of the port D0 of the EZ-B. It is very important that the Red and Black wires are not connected reverse, or you will damage the robot.
Continue to Next lesson
You now know how to connect the H-Bridge and use its basic functions. Your almost ready to be a Roli master! If you experience trouble getting Roli to move, you may need to check Roli's internal HBridge wiring.