Tony Smith wrote: >The tube can be open ended, no need to seal it. I thought it might not >work, but can't think of a reason. The capacitance would read the same. >For the tank, I put the tube on the outside because it was easier, and >well, it never really occured to me to put it inside. > > > I am allowing the water to enter the round tube, because this increases the surface area and makes it more sensitive... >Hmmm, motorcycle fuel gauge... > >I was originally going to put a small magnet on a float inside the tube, >and have a few reed switches outside. That would work for a pond level >indicator (reed switches are easier to deal with than hall effects), but >you need to figure out how to stop the magnet spinning. > > That's a problem, because the fuel sloshes around too much. --Bob >Tony > > > >-----Original Message----- >From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf >Of Alan B. Pearce >Sent: Wednesday, 12 April 2006 9:04 PM >To: Microcontroller discussion list - Public. >Subject: Re: [OT]: Fountain Project- Help Me Pick A Sensor? > > > >>I found the article on the Parallex website: >> >> >>I still think it's a neat solution, cheap too. >> >> > >I was envisaging a tube that went down into the water. have to think how I >can apply this to a water butt. > > > >>If you put a PIC on top, you might as well send back >>the exact water level! >> >> > >True, but also measure the temperature and turn on some mild warmth if it >looks like freezing, so the water butt doesn't get damaged, in my case. > > > -- Note: To protect our network, attachments must be sent to attach@engineer.cotse.net . 1-520-850-1673 USA/Canada http://beam.to/azengineer -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist