>Clairex's CLM6000 optoisolator, are they available these days, or are there other some kind of devices? >>> NSL-32 is a good substitute available from digi-key. -John --------------------------------------------------------- John Simonton PAiA Electronics, Inc 3200 Teakwood Ln. honcho at paia.com Edmond OK 73013 http://www.paia.com 405-340-6300 fax 405-340-6378