:: I beg you, this is not for any other purpose than to count the water :: gallon :: usage in my house using a hall effect switch on the meter. Paul, I have code for a water meter that you can download from my website. It is written in 'C', uses a turbine flow meter, but as this just has a Hall effect switch internally, you should with minimal reworking be able to use it, or play about with the code until you are satisfied. Colin -- cdb, colin@btech-online.co.uk on 10/24/2009 Web presence: www.btech-online.co.uk Hosted by: www.1and1.co.uk/?k_id=7988359 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist