There are many ways to measure the light intensity using a Raspberry Pi and one of them (that doesn’t require an ADC) is the TSL-235. It is a photodiode connected to a small circuit that generates a pulse of which the frequency depends on the light intensity. This frequency can be directly read out using a Raspberry Pi as explained below.
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Tag Archives: raspberry pi
Measuring light intensity with the TSL-235 and a Raspberry Pi
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Setting up Syncthing for Raspberry Pi
Nowadays everything is apparently in the cloud. However the cloud comes in many different sizes and shapes. In my case primarily in the form of dropbox. However there are always downsides of “out sourcing” your data to an undefined cloud. Some popular alternatives include BitTorrent Sync (not open source and your data is still touched by a third party), ownCloud (an open source dropbox clone, however the performance on a Raspberry Pi is not very smooth) and since December 2013 Syncthing. The last one is a kind of open source implementation of BitTorrent Sync, so in contrast to Dropbox your data is distributed over your own computers and not at a distant server. In my setup I use a headless Raspberry Pi that is tucked a way in a cupboard as a node in the network, so this client is always online. Continue reading
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