Controlling 2 Motors in a 4-Wheel Robot Using an H-Bridge

Use PWM sliders to control each motor. Values range from -255 (full reverse) to 255 (full forward). When both wheels have the same speed, the robot moves straight (forward/backward). If one wheel spins faster, the robot turns toward the slower wheel.

Forward

Left Motor PWM ●

▲ 200

Right Motor PWM ●

▲ 200

Max Speed (px/s)

120 px/s

Wheel Base Distance (px)

80 px

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How It Works

Same speed, same direction: Robot moves straight (forward/backward)
Left faster than right: Robot turns RIGHT (toward slower wheel)
Right faster than left: Robot turns LEFT (toward slower wheel)
Opposite directions: Robot spins in place