11: Making Robots Move

Wiring

How it works

HG7881 (L9110) Dual Channel Motor Driver Module Connector

Pin	Description
B-IA	Motor B Input A (IA)
B-IB	Motor B Input B (IB)
GND	Ground
VCC	Operating Voltage 2.5-12V
A-IA	Motor A Input A (IA)
A-IB	Motor A Input B (IB)

Input		Output
IA	IB	OA	IB	Description
L	L	L	L	Off
H	L	H	L	Forward
L	H	L	H	Reverse
H	H	H	H	Off

'

Code

Basic code to drive forward

Extensions

• Can you make it go forward, then backward?
• How about turning?
• Can you make it drive forward if the distance sensor reads 'LOW'?
• If you have 2 distance sensors can you make it turn left for one, then right for the other? This is how you follow a line!