Recent content by Oyvindt

Homebrew Talk - Beer, Wine, Mead, & Cider Brewing Discussion Forum

Help Support Homebrew Talk - Beer, Wine, Mead, & Cider Brewing Discussion Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
  1. Oyvindt

    Can it even be done? Measuring Specific Gravity using Arduino or Raspberry Pi

    That looks like a nice solution! The only thing I would worry about would be proper sanitation of it. Can it be disassembled and can it handle boiling? The holes seem to be a bit small too? There might be a risk of clogging it up. Maybe there are other pitot tubes with bigger holes available...
  2. Oyvindt

    Can it even be done? Measuring Specific Gravity using Arduino or Raspberry Pi

    I've not tested different conditions thoroughly, but the temperature did drop a few degrees (Celsius) during the fermentation without any big change in the measurements. I was hoping that having two tubes would counteract any change in temperature or external air pressure from changing...
  3. Oyvindt

    Can it even be done? Measuring Specific Gravity using Arduino or Raspberry Pi

    Yep. I took gravity readings along with my experiment, and I think it was fairly linear. The wort started out at 1,35 volts @ 1,043 SG and ended at 1,05 Volts @ 1,050 SG. 300 mV on a 0,025 SG range. So for 0,001 change in SG the AD reading would change 300 / 25 = 12 mV. You would probably...
  4. Oyvindt

    Can it even be done? Measuring Specific Gravity using Arduino or Raspberry Pi

    I think it's certainly one of the more viable options for the home tinkerer :) I've done mostly sensor stuff (like temperature / pressure / switces) with the BB so far. Seems like you also use 1-wire sensors with yours?
  5. Oyvindt

    Can it even be done? Measuring Specific Gravity using Arduino or Raspberry Pi

    I haven't really put too much work into it, so there's not a huge amount of stuff to share.. I'll write up what I have though. It comes without any warranties :P The hardware setup is as simple as it can be: The differential pressure sensor is hooked up to two metal tubes though thin...
  6. Oyvindt

    Can it even be done? Measuring Specific Gravity using Arduino or Raspberry Pi

    That seems like a suitable replacement :) I have no idea why I picked the specific sensor that I used. It was probably just the first one I found that had suitable specs..
  7. Oyvindt

    Can it even be done? Measuring Specific Gravity using Arduino or Raspberry Pi

    Time to come out from lurking mode I suppose! I did an experiment a while back using a differential pressure sensor: http://www.digikey.com/product-detail/en/SSCDRRN025MDAA3/480-3660-ND/2704715 .. and a couple of tubes going in to a very ad-hoc-and-experimental fermentor vessel...
Back
Top