Easy RPM Counter | Arduino & IR Sensor

This project uses an infrared (IR) sensor pair to measure the speed of a rotating object and visually represents this speed through the number of illuminated LEDs on a NeoPixel ring. As the object rotates faster, more LEDs light up.

• Arduino (Uno, Nano, Mega, or any compatible board)
• 16 LED NeoPixel Ring
• IR transmitter and receiver pair (IR sensor pair)
• Breadboard and jumper wires
• 5V Power supply for NeoPixel Ring (if required by your setup)
• Resistors for IR sensor pair if needed (refer to your sensor's datasheet)
• Arduino IDE for programming

• Connect the NeoPixel Ring's data input pin to a digital pin on the Arduino (e.g., pin 6).
• Connect the NeoPixel Ring's power (+5V) and ground (GND) pins to the Arduino's 5V and GND.
• Connect the IR receiver's output pin to another digital pin on the Arduino (e.g., pin 2) for detecting pulses.
• Ensure the IR transmitter is positioned to shine directly at the receiver, with the rotating object interrupting the beam.

• Install Libraries: Open the Arduino IDE, go to Sketch > Include Library > Manage Libraries..., and install the Adafruit NeoPixel library.
• Upload the code.