Tux Machines

Open Hardware: Arduino, Raspberry Pi Pico, and SparkFun

Posted by Roy Schestowitz on Feb 18, 2023

Small, MKR WAN 1310-powered device monitors CO2 levels in classrooms

> This CO2 monitor performs two functions: it shows anyone nearby the CO2 levels in the area and it uploads that data over LoRaWAN to a central hub that can track the levels across many locations. A school could, for example, put one of these CO2 monitors in every classroom. An administrator could then see the CO2 levels in every room in real time, along with historical records. That would alert them to immediate dangers and to long term trends.

Control 8 relays with the Raspberry Pi Pico using PicoRelay8 or Pico-Relay-B

> 8086 Consultancy's PicoRelay8 is a baseboard for the Raspberry Pi Pico (W) board equipped with eight 28V DC / 10A Normally Open relays that be used for all sorts of automation projects, while Waveshare Pico-Relay-B also supports eight relays with both DC and AC loads and comes with some extra features.

Remember This?

> We're celebrating two decades of invention, innovation, and electronics here at SparkFun this year! We've released thousands of products throughout our history, and we thought it'd be a fun look back to show you what the top products were each year.

> We've linked related or similar products below the retired ones in case you're inspired by trends of years past to start something new. We've loved growing and developing with you all these years, and these are the highlights of what we've accomplished together.