This is an easy to use optical line tracking sensor you can use with Arduino to build indoor line following robot and project involves contactless sensing.
This is a sensor you can use with Arduino to measure the speed of motor coupled with encoder disk by rate of interruption of optical light, act as a contactless tachometer.
This is a 4-way infrared sensor you can use with Arduino (or other platforms) to sense object and line patterns Package includes 1 x Infrared sensor logic converter module 4 x Infrared sensor pair module 12 x Female-to-female dupont jumper wire
Reflective optical sensor that commonly used to sense black & white lines and obstacle. You can use this sensor to make line tracking sensor unit for line following robots.