question on gpo's

d_johnsen · Post by **d_johnsen** » Mon Jan 27, 2003 11:45 pm

im gonna very soon here be buying a Lk204-25 inverted wide voltage, and was curious, could i hook up a 120 volt device to it, with some sort of relay?
i saw this done to the Lk204-25pc, what about this model? thanks

d_johnsen · Post by **d_johnsen** » Tue Jan 28, 2003 1:06 pm

umm, anyone?

bladerunner · Post by **bladerunner** » Tue Jan 28, 2003 11:01 pm

An optically isolated module would be safest. Here is a beefy one that may work--go to Digi-Key and search for Z918-ND, or here is adirect link to the data sheet:

http://rocky.digikey.com/WebLib/Omron%2 ... a/G3NA.pdf

d_johnsen · Post by **d_johnsen** » Tue Jan 28, 2003 11:36 pm

thank you very much, didnt think anyone was gonna reply, i was gonna go with the lk204-25pc but i wanted a inverted blue screen

Post by **linear** » Wed Jan 29, 2003 9:49 pm

That item that BR linked is great, but maybe overkill (25A!) for your needs.

I'd suggest having a look for an optocoupled triac, then using it to switch a triac that's selected to match the load characteristics. You'll save a buncha money, which you can spend on fuses.

The site that I think explains this idea the best is the Discolitez site. They've got drawings and such, aimed at driving lamps from the parallel port, but easily adapted for your situation.

Miles · Post by **Miles** » Fri Jan 31, 2003 3:50 pm

Hello...

I agree with linear. The only problem you may run into is the complexity of the cct. Hey if I could do it, I'm sure you can! The solid state relays are probably the easiest to set up but cost more. I ran a mini water pump, controlled by a PIC microcontroller using a Clare PD2401 3ma solid state relay and it worked great!!

question on gpo's

question on gpo's

hello?