Zumo 32U4 Robot (Assembled with 75:1 HP Motors) motor_controller There is also a window

There is also a window for GPIO header

until the light intensity exceed the threshold

Pulse rate configurable from 33 Hz to 100 Hz (2)

output: digital switching  (LOW or HIGH voltage on D pin) and analog signal (voltage output on A pin)

Zumo 32U4 Robot (Assembled with 75:1 HP Motors) motor_controller There is also a windowThe Pololu Zumo 32U4 robot is a versatile tracked robot based on the Arduino compatible ATmega32U4 MCU. The low profile robot is less than 10 cm 10 cmsmall enough to qualify for Mini Sumo. No soldering or assembly is required; just add 4 AA bateries and a USB cable and your Zumo is ready for programming. Includes: two 75: 1 HP micro metal gearmotors along with integrated dual motor drivers, an LCD, quadrature encoders, line sensors, side and front