In-the-Air-Challenge: Air filter checking with a home-built laser+photodiode dust counter/challenges-projects/design-challenges/in-the-air-design-challenge/b/blog/posts/in-the-air-challenge-air-filter-checking-with-a-home-built-laser-photodiode-dust-counterPrevious post: In-the-Air-Challenge: Laser-based dust counter using a photodiode, IoT connected Next post: In-the-Air-Challenge: AirSchool Project Summary Air in a laminar flow box with 99.999% filter I have attached a small speaker to the photodi...en-USTelligent Community 12RE: In-the-Air-Challenge: Air filter checking with a home-built laser+photodiode dust counterhttps://community.element14.com/challenges-projects/design-challenges/in-the-air-design-challenge/b/blog/posts/in-the-air-challenge-air-filter-checking-with-a-home-built-laser-photodiode-dust-counterFri, 13 Feb 2015 18:18:50 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:3e822d16-4932-4e7f-8d81-c05c687db164D_Hersey1<p>Perhaps electrostatic precipitation would help with the smaller particles. </p><img src="https://community.element14.com/aggbug?PostID=19920&AppID=102&AppType=Weblog&ContentType=0" width="1" height="1">