A while ago I reported on progress towards a Raspberry Pi based environmental logger.
Well, it has proved to be quite popular at work (several laboratories now use them to log temperature and humidity values for around £100 each device) so I wrote up pretty much all the instructions on how to build one (including the necessary software installation and case details).
Here are the instructions (Word file, PDF file)
Here is a diagram of the stripboard layout (and here is the Fritzing file for it). Note this is shown with the copper tracks uppermost whereas in reality they are underneath the board).
Work on these loggers was mostly in my own time, but additional inspiration and funding came from the EMRP project ‘LUMINAR‘. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.