Pac-Man Ghost Helps With Air Quality Sensing

In the past, building construction methods generally didn’t worry much about air quality. There were enough gaps around windows, doors, siding, and flooring that a house could naturally &#822…

Pocket CO2 Sensor Doubles As SMD Proving Ground

While for some of us it’s a distant memory, every serious electronics hobbyist must at some point make the leap from working with through-hole components to Surface Mount Devices (SMD). At fi…

Anatomy Of A Fake CO2 Sensor

The pandemic brought with it a need to maintain adequate ventilation in enclosed spaces, and thus, there’s been considerable interest in inexpensive C02 monitors. Unfortunately, there are uns…

MH-Z19-like NDIR CO2 Sensor HC8 Found And Explored

While on the search for an alternative to directly buying the fairly expensive MH-Z19 CO2 sensor, [spezifisch] came across a ‘BreeRainz’ branded gadget (also found under other brands) t…

E-Ink Equipped Sourdough Starter Jar

One of the unexpected side effects of our this pandemic is a sudden growth in the global population of captive colonies of Lactobacillus bacteria and yeast. Also known as sourdough starters, they a…