Function:

A photo-electric switch (also known as a photoelectric sensor or photo sensor) is an electronic device used to detect the presence or absence of an object, or to measure the distance to it, by using a beam of light.

The ZTW Spider series of ESCs are a great choice for any size of multi-rotor.

high voltage version(3-30V) 

 2205 KV2300 Brushless Motor – High-Speed Motor for Racing Drones, Quadcopters, and Small Fixed-Wing Aircraft

Power up your RC projects with the A2223/13T 1000KV Brushless Outrunner Motor, designed for smooth, efficient performance in airplanes, quadcopters, and multirotor drones. With its 1000KV rating, this motor strikes the perfect balance between torque and speed, making it ideal for beginner to intermediate-level hobbyists and drone builders.

Keep your brushless motor cool and your performance high with the Hobbywing 40A ESC with Water Cooling. Designed specifically for RC boats and marine applications, this electronic speed controller ensures efficient heat dissipation, smooth throttle response, and reliable high-speed control.

The HW40A 40A Brushless Motor ESC is built for smooth, reliable, and powerful control of your brushless motors. Whether you're flying RC planes, driving cars, or powering boats, this ESC delivers efficient throttle response and excellent heat management.

The HW40A 40A Brushless ESC is a high-efficiency electronic speed controller designed for brushless motors in RC airplanes, cars, boats, and drones. With a 40A continuous current rating, it delivers smooth throttle response, multiple protection features, and wide voltage compatibility for both beginners and advanced hobbyists.

This 42x19mm wheel with pre-mounted N20 electric motor is a ready-to-use drive solution for your DIY robotic and automation projects. The high-precision N20 gear motor provides reliable torque and speed, while the durable rubber tire offers excellent traction on various surfaces.