Line Follower click mikroBUS™ The Click accessory modules plug into the mikroBUS sockets in MikroElektronika microcontroller development boards. Line Follower click features an array of five QRE1113 miniature reflective object sensors. When fitted under a mobile robot with the sensors pointing downwards, the board provides data on the presence of a line on a contrasting background. Multiple sensors are provided so the control system can determine the direction of any drift off course. • 5 x QRE1113 reflective opto-sensors in a line • Output: logic 1 = Dark, logic 0 = White line detected • Communication: Individual GPIO pins • Power supply: +3.3 or +5Vdc • LED power indicator