SSR relay question
Posted: Sat Aug 07, 2010 11:01 pm
So I built a simple PCB that uses 4 AC Solid State Relays so I can turn on and off AC devices with a 5v signal from a MCU. It is a basic circuit but the SSR's I have dont seem to be working. I have some that do work though... I bought a few off of ebay new and they all seem to stay on on problem but no matter what I do they wont turn off!
The connections are really simple.... +, - 5v to trigger the relay, and an input and output... So I tried connecting just the SSR to a power supply thinking maybe my circuit was bad... This one was brand new out of the box. Connected Hot in to the SSR, then my multi meter to the out on the SSR and to the Neutral for my AC power. The multi meter shows the right AC voltage, but even when I disconnect both the 5v power and ground the power stays on. I tried every combination of Neutral/Hot, in/Out on several of the SSR's
Here is the part I have...
http://www.jameco.com/webapp/wcs/stores ... tId=176698
Any ideas if I am doing something wrong or if I just happen to have a bad lot of relays?
The connections are really simple.... +, - 5v to trigger the relay, and an input and output... So I tried connecting just the SSR to a power supply thinking maybe my circuit was bad... This one was brand new out of the box. Connected Hot in to the SSR, then my multi meter to the out on the SSR and to the Neutral for my AC power. The multi meter shows the right AC voltage, but even when I disconnect both the 5v power and ground the power stays on. I tried every combination of Neutral/Hot, in/Out on several of the SSR's
Here is the part I have...
http://www.jameco.com/webapp/wcs/stores ... tId=176698
Any ideas if I am doing something wrong or if I just happen to have a bad lot of relays?