would the froth carry current? what I'm thinking is 2 contacts apart from each other and let the froth make the contact .... so you would have the two contact points at the same height as the cup. when the liquid level rose to that point you would get a signal. I maybe way off here but it is a thought. ----- Original Message ----- From: "michael brown" To: Sent: Monday, May 28, 2001 7:29 PM Subject: Re: [EE]: detecting milk froth > ----- Original Message ----- > From: "Stephen B Webb" > To: > Sent: Monday, May 28, 2001 6:25 PM > Subject: Re: [EE]: detecting milk froth > > > > > This is essentially a problem in optical level detection. > > > > > > Why not just measure reflected light from the surface? A system should > be > > > easy to devise that works by simple geometry. > > > > Simple geometry? As in: incident light at some known angle, sense > > where the reflected light hits, and figure out distance from that? I > > would expect the reflectance properties of milk froth to vary quite a > > bit. > > > > Hmm... > > > > -Steve > > I'm glad they don't measure how full a glass of draught beer is this way. > ;-D > > -- > http://www.piclist.com hint: The list server can filter out subtopics > (like ads or off topics) for you. See http://www.piclist.com/#topics > > -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics