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David Brown
08/22/12 16:42
Read: 507 times
Klamath Falls Oregon

#188126 - more good ideas
Responding to: Richard Erlacher's previous message
I had originally thought of using a potentiometer since I only need it to move ~300*, and the pot provides light turning resistance. Something like this IP67 Bourns Pot link. Then the only issue is sealing the shaft where it goes through the enclosure.

However, a strobe knob or linear sensor should also work well, and I hadn't considered them before. The only possible issue would be finding one with enough angle resolution. But, a quick search only finds something like this, that has a lower IP rating than the Pot above.*

But, I may just need to get rid of the pot and any potential issues, and throw a big knob on the display. It can't be that hard for people to figure out :)

*Potentially stupid question: Do higher IP codes assUme that the object also passes all of the lower numbers? ie, does IP67 (immersion < 1m) also conform to IP66 (powerful water jets)? It makes sense that something water tight is also dust tight, but just because something can be immersed, doesn't necessarily mean it will withstand powerful water jets (in my thinking, at least).

List of 22 messages in thread
Designing a product for use in water      David Brown      08/21/12 17:39      
   Have you considered silicone coating?      Richard Erlacher      08/21/12 21:11      
   one link      Stefan KAnev      08/21/12 22:04      
   Waterproof enclosures      Oliver Sedlacek      08/22/12 02:12      
      Projective touch - or maybe waterproof tablet      Per Westermark      08/22/12 06:27      
         If that potentiometer wasn't a hard requirement      Erik Malund      08/22/12 08:00      
            more details      David Brown      08/22/12 10:54      
               You might want to look into that a bit further      Richard Erlacher      08/22/12 13:33      
                  buttons for up/down gives tactile feedback      Per Westermark      08/22/12 14:12      
                     nevertheless, a strobe wheel rather than a pot ...      Richard Erlacher      08/22/12 15:24      
                        more good ideas      David Brown      08/22/12 16:42      
   Go to the lowest practical voltage      Jim Granville      08/22/12 16:20      
      answers      David Brown      08/22/12 17:39      
         Electric shock and intrinsically safe      Oliver Sedlacek      08/23/12 02:11      
            Isolators      David Brown      08/23/12 19:13      
               a question and a reference      Erik Malund      08/24/12 07:05      
                  answers      David Brown      08/24/12 10:55      
                     tethered unit??      Erik Malund      08/24/12 12:12      
                        mounted display      David Brown      08/24/12 12:32      
                           have you considered a combination of battery and solar?      Richard Erlacher      08/24/12 14:56      
                              indoor pool      David Brown      08/27/12 10:24      
                           Wireless chargers      Oliver Sedlacek      08/27/12 15:30      

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