Pololu Dual G2 High-Power Motor Driver 24v14 Shield for Arduino POL_P-Star Programmable Controllers It has 14 digital input/output

It has 14 digital input/output pins (of which 6 can be used as PWM outputs)

You will not have access to the full suite of features the TReX Jr provides if you do not make use of the serial interface

Pulse-width

all on a board measuring only 1

Pololu Dual G2 High-Power Motor Driver 24v14 Shield for Arduino POL_P-Star Programmable Controllers It has 14 digital input/outputThis shield makes it easy to control two high power DC motors with your Arduino or Arduino compatible board. Its twin discrete MOSFET H bridges support a wide 6. 5 V to 40 V operating range and are efficient enough to deliver a continuous 14 A without a heat sink. The drivers offer basic current sensing and current limiting functionality, and they accept ultrasonic PWM frequencies for quieter operation. The Arduino pin mappings can all be customized