It’s called Ketosense, and it will tell you how well your keto diet is doing by just having you blow into a sensor. [Jens]’ device consists of an Arduino, LCD display, and two sensors – one ...

According to [Dr. Tom Lehrer’s] song Pollution, “Wear a gas mask and a veil ... [Ashish Choudhary] married an Arduino with a display and a pollution sensor to give readings of the PM2.5 ...