When would you choose mechanical, versus solid state?
Would I be correct in assuming that SSRs have opto-isolators built in, and as such don't need additional isolation?
If using an SSR, where are people getting them?
The disadvantage with a SSR over a relay is that there is a little current leakage
Would I be correct in assuming that SSRs have opto-isolators built in
Are you saying that you'd connect grounds on each side of the isolator individually, but then not connect the two sides together?
it appears that they typically have a + and - connection for each side
connect them to a GPIO pin and ground (respectively) on the control side, and then connect the switched side between 120V AC line and the device I'm controlling?
it looks like it's really that simple...... or am I missing something?
but aren't the opto-isolators used here just as much for blocking noise as for providing safety
I know from coworkers that under extreme stress a relay can fail so a molten hot contact falls across the coil