Introduction: Pulse Sensor Heart Rate Track

The purpose of our project was to create a fun and competitive interactive heart rate monitor. The participant measures their heart rate using a pulse sensor attached with a velcro cuff. This heart rate measurement correlates directly to whether the launcher launches a hot wheels car or not. If the participant has a bpm over 90, the hot wheels car will be accelerated through the launcher. So get moving and start racing!

Supplies

  • Pulse Sensor

https://www.mouser.com/ProductDetail/SparkFun/SEN-11574?qs=WyAARYrbSnbXFVot27lDnQ%3D%3D&mgh=1&gclid=Cj0KCQjwz7uRBhDRARIsAFqjulm091YaD_uso253oK9W3W5BwB-VRIs78mu3hkk9WJczR-MMxmd4fTkaAki-EALw_wcB

  • Servo Wheels 

https://www.amazon.com/Feetech-Degree-Continuous-Rotation-Arduino/dp/B079MF1BZS/ref=asc_df_B079MF1BZS/?tag=hyprod-20&linkCode=df0&hvadid=312126267824&hvpos=&hvnetw=g&hvrand=14121957410390855595&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9008695&hvtargid=pla-646852416703&psc=1 

  • PLA
  • A 3D printer of your choice
  • Any standard dimension hot wheels car
  • Arduino Uno
  • USB 2.0 Cable Type A/B
  • Breadboard
  • Jumper Wires
  • 100 ohm Resistor

Step 1: 3D Print the Motor Housing

Download the provided .stl file and print using an available 3D printer. Set printer up for PLA specifications with 5% infill. Note that unless your printer has an extra-large build plate, parts will have to be printed separately. 



Attachments

Step 2: Prepare Code

Use the provided MATLAB code to read the pulse from the pulse sensor and output the user's heart rate. 

Attachments

Step 3: Breadboard Circuit

Wire the necessary components together using the provided images.

Step 4: Connect the Components

Place the servo motors in the pockets beside the track, plug in your Arduino to the USB port of your computer, and prepare your racer.

Step 5: Have Fun!

See if you can launch your hot wheels!

Attachments