> It IS possible to design a resistive input mains interface that doesn't > violate IC input specs and which handles reasonably probable transients > well. With all this huff and puffing on this subject, has anybody actually tried it? > It may be cheaper than using an opto but will not be safe for human > isolation purposes. In my case, that was never an issue. Sean -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu