What is the easiest and least expensive way to measure millivolts and = get those readings into a PC serial port. I want to buy something, not build it.=20 I need to measure two channels, each will range from +250 to about +2000 = mVolts DC. The levels are fairly steady. I need millivolt resolution. I was thinking about a DVM with PC serial port capability, but I would = need two of them and my laptop only has one serial port. Any ideas, suggestions? Thanks John -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads