I was expecting it to be triac and didn't even notice that it wasn't

As I was as well.
Yes Load would be connected as shown.

 

You have established to yourself why hysteresis is a desirable attribute. Without it the tendency for a circuit to just sit there and oscillate around the cusp of change is very large.

 

You have established to yourself why hysteresis is a desirable attribute. Without it the tendency for a circuit to just sit there and oscillate around the cusp of change is very large.

Yes.....but like a wrench one must know which way to turn, and in my case, when!

 

One trick is to slow the system down, so it reacts very slowly to changes instead of over compensating to what are probably slow changes to begin with, think of it like a filter capacitors and smoothing ripples. The ripples are the compactor switching on/off.

 

In the following circuit, there is a 39 Ohm resistor in series with a .01uF capacitor, or in-other-words a "snubber."
I'm not sure this is really needed, but if so what sort of specs would I be looking for in the cap and resistor, other than the 39 ohms and .01uF.

The device on the 110VAC side will be either an incandescent, or LED light-bulb only.

 

In the following circuit, there is a 39 Ohm resistor in series with a .01uF capacitor, or in-other-words a "snubber."
I'm not sure this is really needed, but if so what sort of specs would I be looking for in the cap and resistor, other than the 39 ohms and .01uF.

The device on the 110VAC side will be either an incandescent, or LED light-bulb only.

View attachment 165526

If it's a resistive load, then the snubber is not really needed, although it's recommended so that it can handle the switching spikes when the the triac is turned on and off. Especially since the MOC3021 does not seem to use zero-crossing triggering.

 

If it's a resistive load, then the snubber is not really needed, although it's recommended so that it can handle the switching spikes when the the triac is turned on and off. Especially since the MOC3021 does not seem to use zero-crossing triggering.

Any idea what resistor and capacitor specs I should follow... voltage/wattage ratings?

 

Any idea what resistor and capacitor specs I should follow... voltage/wattage ratings?

That depends on the load, how much power are you planning to drive?

 

Any idea what resistor and capacitor specs I should follow... voltage/wattage ratings?

For the circuit in post #25.
I think the cap should be an X class safety cap (there's also a Y class safety cap). You'll have to read up on that. The resistor can be a low wattage (0.5W) type because there is normally not much current passing thru it.

For RIN, if you really want 10ma input then it should be lower...about 180 ohms.
The opto diode will drop about 1.2v@10ma and LED1 (assuming) 2.0v@10ma

eT

 

That depends on the load, how much power are you planning to drive?

I would say, that at max, the LED bulb will be not more than 15W, but likely just about 6W. I will not be using an incandescent bulb.

 

Check this typical application, extracted from the FOD4216 datasheet:

​

 

For the circuit in post #25.
I think the cap should be an X class safety cap (there's also a Y class safety cap). You'll have to read up on that. The resistor can be a low wattage (0.5W) type because there is normally not much current passing thru it.

For RIN, if you really want 10ma input then it should be lower...about 180 ohms.
The opto diode will drop about 1.2v@10ma and LED1 (assuming) 2.0v@10ma

eT

Indeed, 3V remaining for a drop across opto-LED, 180 ohms is correct!

 

As for voltages, I'd go for an ordinary HV polyester capacitor of at least 400V such as this.

 

From what I am reading, I will not need "snubbing" circuitry. However, some interesting info can be found here:
[URL='https://www.maximintegrated.com/en/app-notes/index.mvp/id/907']RC Snubbing
[/URL]
Snubber Circuit Design Calculators

 

And regarding de 39 ohm resistor, a 1/4W type would suffice.

From what I am reading, I will not need "snubbing" circuitry. However, some interesting info can be found here:
RC Snubbing

Snubber Circuit Design Calculators

Not really ... then again, it's always better to have it, and not need it, than to not have it, and then need it

 

And regarding de 39 ohm resistor, a 1/4W type would suffice.

Not really ... then again, it's always better to have it, and not need it, than to not have it, and then need it

Will be adding the snubber. What the heck