Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!tut.cis.ohio-state.edu!ucsd!ames!ncar!stout!cook From: cook@stout.ucar.edu (Forrest Cook) Newsgroups: sci.electronics Subject: Re: Switching from 5V to 120V Keywords: relays or triacs? Message-ID: <6390@ncar.ucar.edu> Date: 22 Feb 90 00:21:53 GMT References: <3709@uceng.UC.EDU> Sender: news@ncar.ucar.edu Reply-To: cook@stout.UCAR.EDU (Forrest Cook) Distribution: na Organization: Field Observing Facility, NCAR, Boulder, CO Lines: 11 I would suggest looking into solid state relays. They are optoisolated triacs with some additional goodies inside. Your circuit can drive the led inside of the SSR without any changes and the SSR does the dirty work. They can be had new in the $10 to $50 range depending on how much power you want to control. Surplus electronics stores often carry them for a few bucks each. ^ ^ Forrest Cook - Beware of programmers who carry screwdrivers - LB /|\ /|\ cook@stout.ucar.edu (The preceeding was all my OPINION) /|\ /|\ {husc6|rutgers|ames|gatech}!ncar!stout!cook /|\ /|\ {uunet|ucbvax|allegra|cbosgd}!nbires!ncar!stout!cook