From: macl...@gmail.com   
      
   On Wednesday, August 24, 2022 at 3:54:04 PM UTC-3, Phil Hobbs wrote:   
   > Marcos Loyola wrote:   
   > > Hello good day! I need a simple circuit to detect the turbidity of   
   > > the reuse water from the washing machine, that is, discard the 1st   
   > > water and reuse the others, a very simple circuit for a low-income   
   > > community. Thank you Marcos   
   > >   
   > On a good day, you can measure the turbidity using an Arduino, a LED, a   
   > phototransistor, and a resistor.   
   >   
   > The problem normally has more to do with how to keep the optical window   
   > clean.(*) That might be easier with a clothes washer, because the flow   
   > is pretty strong and frequently has a lot of detergent and bubbles,   
   > which should help.   
   >   
   > It'll need some experimenting, though.   
   >   
   > How high-tech is your setup? I assume you have a storage tank, but how   
   > does the water get in and out, and how is that controlled?   
   >   
   > Cheers   
   >   
   > Phil Hobbs   
   >   
   > (*) If you have the time, and a nearby library can get a copy, Mark   
   > Johnson's "Photodetection and Measurement" is an excellent read. Mark   
   > was the head of quality assurance for a bit water utility in England,   
   > and really knows turbidity measurements. A lot of it is quite   
   > accessible at hobbyist level.   
   >   
   > --   
   > Dr Philip C D Hobbs   
   > Principal Consultant   
   > ElectroOptical Innovations LLC / Hobbs ElectroOptics   
   > Optics, Electro-optics, Photonics, Analog Electronics   
   > Briarcliff Manor NY 10510   
   >   
   > http://electrooptical.net   
   > http://hobbs-eo.com   
   Grateful for the feedback   
      
   --- SoupGate-Win32 v1.05   
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