Sprinting Speed Monitor Using Raspberry Pi Pico 2

To create a sprinting speed monitor using an ultrasonic sensor, an OLED display, and a button to stop the counting, you can follow these steps:

Components Needed:

1. Ultrasonic Sensor (e.g., HC-SR04): To measure the distance of the sprinter.
2. OLED Display (SSD1306): To display the calculated speed.
3. Button: To stop the counting and display the final speed.
4. Microcontroller: Raspberry Pi Pico 2
5. Breadboard and Jumper Wires: For connections.

Concept Overview:

• The ultrasonic sensor will measure the time it takes for the sprinter to pass between two points.
• The microcontroller will calculate the speed based on the time taken and the distance between the points.
• The OLED display will show the calculated speed.
• A button will stop the counting process and display the final speed.

Steps to Implement:

1. Wiring:

   • Ultrasonic Sensor:
     • VCC to 5V (or 3.3V depending on your microcontroller)
     • GND to Ground
     • Trig to a digital pin (e.g., GP15 on a Raspberry Pi Pico 2)
     • Echo to a digital pin (e.g., GP14 on a Raspberry Pi Pico 2)

1. • OLED Display:
     • VCC to 3.3V or 5V
     • GND to Ground
     • SCL to a digital pin (e.g., GP5 for I2C)
     • SDA to a digital pin (e.g., GP4 for I2C)

Get the code and library here

Explanation:

• The ultrasonic sensor measures the time it takes for the sound wave to return after being sent out, allowing you to calculate the distance.
• The speed is calculated based on the time difference between when the sprinter triggers the first measurement and when they pass the second measurement point.
• The button stops the process and shows the final speed on the OLED display.

Considerations:

• You might need to adjust the distance threshold based on your specific setup.
• Ensure the distance between the two points is accurately measured for correct speed calculation.

This project can help track and display the sprinting speed effectively using basic electronics and programming.