An IR sensor determines how far the ping-pong ball is from the edge of the beam. With everything wired to the Arduino, you have a pretty good testbed for a controller. If is common to “tune” a ...

The part list consists of one Arduino, two resistors, and one IR emitter. That’s right, an emitter. When an LED (IR or otherwise) is reverse biased it can act as a light sensor. The main ...

Finally, your Arduino toolkit will be incomplete ... or another temperature sensor. Likewise, ultrasonic and IR modules are indispensable for robotics projects. For folks into electrical circuits ...