4.0 BOARD LAYOUT
1. Power Terminal Block
Connect to power source. For high current application, please solder the wire directly to
the pad at bottom layer.
2. Input
Pin No. Pin Name
Description
1
GND
Ground
2
PWM
*
PWM input for speed control.
3
DIR
Direction Input.
*
Note this is not RC (Radio Control) PWM
3. PWM Source Selector
Select the source of the speed control PWM.
PWM Source
JP4
JP6
Internal Potentiometer
INT POT
INT PWM
External Potentiometer
EXT POT
INT PWM
External PWM Signal
X (Don’t Care)
EXT PWM
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