Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!leah!rpi!crdgw1!algol!heller From: heller@algol.crd.ge.com (aaron j heller) Newsgroups: sci.electronics Subject: Re: TTL to 1500 watts - query Summary: Solid State Relay Message-ID: <716@crdgw1.crd.ge.com> Date: 9 Jun 89 17:42:25 GMT References: <1164@garcon.cso.uiuc.edu> Sender: news@crdgw1.crd.ge.com Reply-To: heller@algol.crd.ge.com (aaron j heller) Distribution: usa Organization: General Electric Corp. R&D, Schenectady, NY Lines: 13 In article <1164@garcon.cso.uiuc.edu> kline@tuna.cso.uiuc.edu (Charley Kline) writes: ... >the part that's going to have to take the delicate little TTL >signal from my shift register and use it to turn on and off a >1500-watt lighting instrument. A mechanical relay is right out ... There is a device called a solid state relay. I used a few of them about 10 yrs. ago for a similiar application. They are a combination of an opto-isolator and triac. Some of them also have zero-crossing detectors built in to minimize RFI problems. Check the Newark catalog. Aaron Heller (heller@crd.ge.com uunet!crdgw1!heller)