What is the cheapest isolated oscilloscope probe available? Low bandwidth is fine. Cheapest I have found is the BK Precision PR-60 for around $320 USD. If nothing sub $160 exist I could envision myself using a $30.00 passive high voltage probe in conjunction with a properly biased optocoupler. --=20 Jason White --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .