We quite frequently get asked about optimum operating temperatures for the Raspberry Pi – frequently enough that this was a very early addition to our FAQs page back in 2012:
The Raspberry Pi is built from commercial chips which are qualified to different temperature ranges; the LAN9512 is specified by the manufacturers being qualified from 0°C to 70°C, while the AP is qualified from -40°C to 85°C. You may well find that the board will work outside those temperatures, but we’re not qualifying the board itself to these extremes.
And we left it at that. I hadn’t really thought much about extreme environments for a while – but then I bumped into our friend Jonathan Pallant, from Cambridge Consultants, a couple of weeks ago; and he started telling me about the progress of a project he’s been working on with the Zoological Society of London (ZSL), which pushes the Raspberry Pi’s working temperature down further than any other we’ve seen.
The penguins trigger the cameras (there are two in each unit: a regular camera and one with no IR filter for taking pictures in the dark with an infra-red flash – sound familiar?) by moving near them; each unit is equipped with an motion detector. The pictures are then sent to the researchers by the Pi via the Iridium satellite network. Each setup is powered by external lead batteries, which are topped up (when the sun’s out) by solar panels.
Researchers count the penguins from the images, and are able to track when they arrive to breed, and monitor populations. In previous studies, a human would have to go out to the camera installation and pick up the data by hand: networking the cameras, using Raspberry Pis, means that this doesn’t need to happen any more.
There are a few ways in which you can help Penguin Lifelines. The researchers are crowdsourcing some of the work that needs doing in classifying images: the pictures the project is creating need sorting to establish how many adults, chicks and eggs are visible in each.
804,303 images have been classified so far, but there are plenty more to help sort.
You can also make a donation. Adopting a colony will help fund the placing of more Raspberry Pi cameras in remote regions to monitor penguin populations.
You can read much more about the project over at the Penguin Lifelines site. And because we think penguins are brilliant, here are a couple more pictures.