Pulse85

Features

• Lightweight (~4 grams)
• No batteries required
• Very affordable
• Android app (Linux and Windows are on the roadmap)

How To Make Your Own Pulse85

You'll need a PulseSensor, a Digispark, some jumper wires, and soldering tools.

1. If your PulseSensor comes with the jumper wires soldered, cut them about 2 cm from the PulseSensor. Otherwise, solder three wires (about 2 cm each) for each pin (+, -, and S).
2. Solder the wires to the Digispark according to the schematic.
3. Make a sleeve out of leather to protect your Pulse85. (Optional)
4. Follow the instructions on Digistump's wiki to set up your Arduino IDE.
5. Upload the code (hardware/sketch.ino) to your Digispark.
6. Install the Pulse85 app on your phone. You can find the APK on the releases page.

Roadmap

• Basic functionality (heart rate and PPG graph)
• Get a unique USB VID/PID (1209:5385)
• App settings (set threshold, graph settings, etc)
• Cross-platform support (Linux and Windows are prioritized)
• Design a PCB to further reduce size

License

All source code (both software and hardware) is licensed under MIT license. The documentation, schematic, and images are licensed under Creative Commons Attribution-ShareAlike 4.0 (CC BY-SA 4.0).