Hi Mike, Since most relays these days have at least one set of N.O. (normally open) and N.C.(normally closed) contacts, you could use the N.C. contacts and the relay will pass the current until the relay is *activated* which will switch off the current.
You could use the potentiometer as a variable voltage reference for an op amp. and when the voltage drops below the reference voltage the relay activates and shuts off the brew current. If you use the N.O. contacts with a light bulb or led, it will switch on when when the current goes off, letting you know the job is done. I think that the multiple nine volt battery setup is a good basic "thing" but is not suitable for much in terms of bells and whistles, so if one chooses bells and whittles, one ought to seriously consider a plug-in power supply of some sort. Trem Said: >> What really bothers me is that people won't spend any money on technology and yet they will go to the doctor, get a prescription and usually spend over a hundred dollars for their prescription and they won't consider spending that amount on a machine that will last them a lifetime and make the product that gets them off the pharmaceutical t_t.<< I definitely agree. It seems that most folks do not choose to be responsible for themselves and seek remedies for their lackings from someone else. They would have something done to them or for them, rather than learn how to do it for themselves. If something doesn't go quite right, it is easier for these folks to sue someone than to admit that maybe they didn't learn something well enough to achieve the goal. They are not living their own life. Their life is a composite of all the institutions and entities that they require to make decisions for them. If we are going spend money for bells and whistles technology, we also need to consider spending a few more bucks on the appropriate power supply technology to get the job done as desired. Keep Drinking, David ------------------------- Michael Leavitt wrote: > > How about installing a potentiometer in series with the relay > coil to vary the available voltage, i.e. the point it would >drop out. Take reading of PPM and calibrate the scale of the >knob on the pot. > > Mike > -- E-mail: [email protected] Fax to: 1-253-681-1133 ICQ#... 44960928 _______________________________________________ Why pay for something you could get for free? NetZero provides FREE Internet Access and Email http://www.netzero.net/download/index.html -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: [email protected] -or- [email protected] with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: [email protected] Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <[email protected]>
