Just to clarify my setup, I have a 160VA toridal transformer connected to 240volts using the solid state relay as a switch, the solid state relay is being triggered with 5 volts dc ( the relay says that it will trigger with anything between 3 and 32 volts). The relay turns on OK but when I turn it off there seems to be enough leakage current to keep the transformer half energised eg on the secondaries I'm getting 22 volts when turned off. I'm still to try it with a decent load but it seems like a reasonable amount of leakage current. Would you considder this normal? Regards Stuart > > To: PICLIST@MITVMA.MIT.EDU > > cc: (bcc: David E Arnold/SYBASE) > > Subject: Re: [OT ] Problem turning off a solid state relay > > > > > > > > > > yes they are SCR or TRIAC 's and you are measuring leakage > > Art > > artb@cableinet.co.uk > > ----- Original Message ----- > > From: Stuart > > To: > > Sent: Saturday, April 15, 2000 3:22 PM > > Subject: [OT ] Problem turning off a solid state relay > > > > > > > I've got a couple of solid state relays that I would like to put to use > > but > > > I've got a problem with them at the moment, I can't turn them off > > > completlely. I've got 240 volts hooked up to one and I can turn it on > > using > > > 5 volts DC. The voltage drop across it's terminals is only 2 volts when > > > turned on and when I turn it off instead of the voltage being 240 volts > > > across it's terminals it is 120 volts so therefore it's only half > > switching > > > off. Does anyone have an idea as to whats wrong? > > > Thanks in advance > > > Regards > > > Stuart > > > > > > P.S. I'll be using a PIC to drive this > > > > > > > > >