At 11:59 AM 5/27/98 +0930, you wrote: >Hello > >Maybe set up a Voltage to Frequency converter powered by the 3-30 Volt i/p, use a standard opto isolator and count the pulses? That's a pretty neat idea. I'll have to investigate that. Thanks! Andy ================================================================== Andy Kunz - Statistical Research, Inc. - Westfield, New Jersey USA ==================================================================