Pololu's QTR-HD-04, from their own CAD: a 17.00 × 20.00 mm board reading 4 channels on a 4 mm pitch, with 7 pads on the 0.1 inch pitch. The A (analog) and RC (digital) versions share this board.

One of the QTR Reflectance Sensor family.

Made by

Pololu

Kind

Circuit board (PCB)

Licence

CC-BY-SA-4.0

Keywords

pololu, qtr, reflectance, sensor, line, infrared, ir, follower, hd, qtr-hd-04, qtr-hd-04a, qtr-hd-04rc