5 Channel TCRT5000 IR Array Tracking Sensor Module is a sensor board designed for use with line follower robots. This IR sensor module has been sufficient to meet the frequent task of tracking, but also with the infrared distance sensor and touch detection sensor. This TCR T5000 array unique makes your robot design able to adapt to the situation easily. It is specifically designed as a black line especially suitable for the complex of the black and white line, cross black and white line detection. This high-quality sensor module has 6 roads high sensitivity infrared sensor (5 escapes patrol, 1 road), to the recognition of black and white line accurately.

2 Channel Relay Module Relay Board Arduino Relay Module With Optocoupler allows a wide range of microcontrollers such as Arduino, AVR, PIC, ARM with digital outputs to control larger loads and devices like AC or DC Motors, electromagnets, solenoids, and incandescent light bulbs. 4–channel relay interface board, and each channel needs a 15-20mA driver current. It can be used to control various appliance

This Arduino touch sensor module based on the dedicated TTP223 touch sensor IC. The TTP223 capacitive touch switch provides a single integrated touch sensing area of 11 x 10.5mm with a sensor range of ~5mm. An on-board LED will give a visual indication of when the sensor is triggered. When triggered the module's output will switch from its idle low state to high (default operation). Solder jumpers allow for reconfiguring its mode of operation to be either active low or toggle output.