QTR-HD-09A Reflectance Sensor Array: 9-Channel, 4mm Pitch, Analog Output Category_Electronics/Misc Items There are two possible hardware

There are two possible hardware interface options:

8mm display area

If the pressure sensor's selected slave address happens to conflict with some other device on your I²C bus

while the last column is the measured top speed of a Zumo chassis loaded to a weight of 500 g and driven with these motors

QTR-HD-09A Reflectance Sensor Array: 9-Channel, 4mm Pitch, Analog Output Category_Electronics/Misc Items There are two possible hardwarepitch sensors size (mm) output max current optimal range LED board 4 mm 9 37. 0 20. 0 analog 30 mA 155 mA 5 mm This array of IR LED phototransistor pairs is great for precisely identifying changes in reflectance (like line detection). It operates from 2. 9 V to 5. 5 V and offers dimmable brightness control independent of the supply voltage and separate controls for the odd and even emitters. In general, the closer the object, the higher the contrast