No, I only have ADC lines available. This is a half-completed inheritance. The board we are working from (real hardware!) has the delta inputs going into op-amps, with the output going to the appropriate ADC input. WHen we hook it up, we have to connect a ground between GND and the "-" input for it to fly. That only works if you are on the lowest one, because as soon as you think about connecting the "-" of the next to GND, POOF as you just shorted out a cell. Andy "Alan B. Pearce" on 11/01/2000 10:35:23 AM Please respond to pic microcontroller discussion list To: PICLIST@MITVMA.MIT.EDU cc: (bcc: Andrew Kunz/TDI_NOTES) Subject: Re: [EE]: Analog help needed can you use some form of voltage to frequency converter for each group, and then use a pulse transformer or opto to transfer to the PIC? -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST