Ludwin| Quantity | Component name | |
| 1 | × | Demos D1 mini |
| 1 | × | 0.66 inch OLED display |
| 1 | × | MAX30102 heart rate sensor |
| 1 | × | 3D printed parts |
One Hertz, One Beat –DIY Arduino Heart Rate Sensor
A compact, open-source heart rate monitor built with Arduino, MAX30102, and a 3D-printed case for the One Hertz Challenge.