DFRobot Metal DC Gear Motor + Encoder 12V 251RPM 18kg-cm Cable Tie Nylon Set Six Colors 60pcs Indicator LEDs Some modules include

Indicator LEDs Some modules include built-in indicator LEDs to provide visual feedback on the detected line status

plus a breadboard and jumper wires for quick setup and testing

1 × DFRobot Relay Module V3

Popular add-ons include probe cleaner

this is also great for detecting objects

DFRobot Metal DC Gear Motor + Encoder 12V 251RPM 18kg-cm Cable Tie Nylon Set Six Colors 60pcs Indicator LEDs Some modules includePractical DC Geared Motor for Maker, Student, and Prototype Builds The Metal DC Geared Motor Encoder 12V 251RPM 18Kg. cm is a practical dc geared motor from Circuitrocks for students, makers, and repair friendly builds. It fits well in projects that need general project use, while keeping setup straightforward for testing and prototype work. Compared with generic parts, this product stands out through details such as Built in encoder, 12V, 251RPM.