As I've introduced myself in the previous post, I am quite new at this. I have some experience with using relays to drive an AC load, but here I want to not use 5V or 12V altogether. So I recently discovered that I could use an optotriac + triac combo to drive a load like a relay.
I need someone who has more experience to teach me if I've done something wrong here and if so, what did I miss?
GPIO signal is a 0/3.3V signal. This is to drive an inductive/resistive load.
(I built this circuit using a breadboard without the AC connected. With a multimeter on the AC pads, I measured infinite ohms when GPIO is low and about 12 MOhms when GPIO is high. I am expecting 0 ohms when GPIO is high, like a relay would - but as I understand the triac resistance depends on the current going through. Anyway, I am not confident with this circuit because of this)
Thank you in advance!
![AC load driver with triac](//image.easyeda.com/pullimage/4xjPAvqBa1hGNLHWhhZ6rTsKsUlpH83CbRyMH3DD.png)