There was an error while loading. Please reload this page. This is an arduino sketch (and rough description of the build) for making an photo enlarger controller. In ...

Before running, enable i2c interface, install smbus and rpi.gpio, and connect the sensor. If you use hrcalc.py to get HR and SpO2, numpy is required.

Back in 1991, I was in New Delhi visiting the iconic Lotus Temple (Bahá’íHouse of Worship). The temple’s breathtaking ...