I've got this board from a local store. It's an L293D based dual DC motor driver. All the pins are labelled except the 5 on the bottom as shown in the picture below. Couldn't find any datasheet or manual for using this board.
I've connected the board's Vcc to Arduino's 5V and board's ground to Arduio's GND. Then put the IN1 to HIGH and IN2 to low, and got a voltage of 4.3 across the motor A's terminals.
Now what I want to do is use an external power source (11.1V battery) for the motor terminals, NOT the Arduino's 5V.
- Are there any datasheet/manual for this board?
- How do I use external power source with this board?
- What are the pin-out/labels for those 5 pins annotated with a red box in the picture above?