I don't know about building from scratch at this point, my time has been kind of at a premium, and I probably would opt to just buy a new clock board for the oven if it gets to that point. Just finished replacing all the resistors and diodes (all 9 pieces) in the area. The old pieces all seemed to check OK. added another capacitor to the existing with no change. The 12 VAC centertap checked at 6.3 V and 6.6 V. Maybe a little wider than I would have expected. The unit just got powered up a couple of minutes ago, and looks OK so far, but has done that before. Will report back in a day. Thanks everyone for their help. Vasile Surducan wrote: > BTW, > assuming you want to build it from scratch, how many IO pins will be > necessary for a > 7 seg clock displaying: > dd:mm:yyyy hh:mm:ss:tt totaly16 digit > where the format displayed is day:month:year hour:minute:second:milisecond > > Vasile > > On 11/9/09, Carl Denk wrote: > >> OK, thanks again. It's a little hard to power up out of the appliance, >> but, think that can happen. Should be able to get to it tomorrow, and >> will report back. >> >> Dwayne Reid wrote: >> >>> At 02:57 PM 11/9/2009, Carl Denk wrote: >>> >>> >>>> Probably I can check the resistance of the transformer windings. I'm >>>> pretty sure it's center >>>> tapped, then the resistance of both sides should be close. :) >>>> >>>> >>> Not necessarily. >>> >>> The resistance will be similar if the windings were done >>> bifilar-style. They can be significantly different if they are done >>> as one winding on top of the other - the outer winding uses more wire >>> and therefore has a higher resistance. >>> >>> Your better bet is to measure the voltage from center-tap to each end >>> of the winding while under load. >>> >>> dwayne >>> >>> >>> >> -- >> http://www.piclist.com PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> >> -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist