| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Awesome!!! We're going to start distributing these with buttons and low-profile batteries soon at http://store.publiclab.org so including a button ..." | Read more » | almost 7 years ago | |||
| cedarlodge | "Here’s a basic guide to adding a tactile button to the GPIO pins: https://www.modmypi.com/blog/tutorial-tactile-switch For a neater package, i’d ..." | Read more » | almost 7 years ago | |||
| warren | "Oh, interesting! Maybe @programmer1200 would be interested in this, re: related work on a turbidity sensor... " | Read more » | almost 7 years ago | |||
| Ag8n | "The current epa method for turbidity, with standard prep, is at: Https://epa.gov/sites/production/files//2015-08/documents/method_180-1_1993.pdf ..." | Read more » | almost 7 years ago | |||
| Ag8n | "Absolutely correct. The fluorescence spectrometer is the same layout as for the basic turbidimeter. The standards are a bit of a pain, but quite ..." | Read more » | almost 7 years ago | |||
| warren | "So a design using the Lego Spectrometer, for example, might need a right-angle light source -- but that's not so bad, since already with fluorescen..." | Read more » | almost 7 years ago | |||
| warren | "Hm, good point -- actually going back to an old post there's some great stuff here: https://publiclab.org/notes/donblair/08-25-2015/turbidity-001 ..." | Read more » | almost 7 years ago | |||
| Ag8n | "By definition, turbidity measures the amount of light scattered at a 90 angle. So there would have to be a change in the optical layout from the ..." | Read more » | about 7 years ago |