Let me clarify this to you. This project works and can actually monitor your pulse. Due to the lack of research and experimentation, the homebrew pulse monitor cannot be used for medical purposes.
What Can You Do With It?
You can make a lie detector/ polygraph and tell who's lying or not. When a person lies, you'll notice a sudden change on the graph.
What Does This Guide Include?
- Arduino Codes & Processing 2 Codes
- Steps on making a pulse sensor
- The Virtual Graphing Software
- Schematic Diagrams
What Do I Need To Make This Project?
- A Grippy Clothes Hanger
- Clear/ Bright Red LED
- LDR (Light Dependent Resistor)
Why isn't mine working? For some reason LDRs (light dependent resistors) are not standard in resistance ratings. You'll need a some tweaking to pull off the project, it may require experience with Arduinos and electronics.
This project is inspired by Make Magazine's pulse monitor although my version didn't use a LM324 Op-Amp chip. Their tutorial will work on my setup.
Make: Full Tutorial