how to detect Ac

[Mike_2545]

Yes, a relay will work in this instance.
Sometimes size is a concederation and relays/sockets may be larger than acceptable.
Relays are also mechanical, some designs may call for solid state.
Cost may also be an issue, relays and sockets run around $5-$7 for the set, the components I listed will be around $1.
Wiring may also be a constraint on design, with relays, switched power needs to be wired, where the design I posted supply the power (2 wires vs 4)

Don't beat yourself up too bad for reading the whole thread.

 

[KMoffett]

Y
Don't beat yourself up too bad for reading the whole thread.

Are you implying that there was just toooooo much discussion?

ken

 

[Mike_2545]

Are you implying that there was just toooooo much discussion?

ken

Not at all, just that umer27 seemed a little exasperated, and I didn't want him to be that extreme, shooting himself and all.

 

[shingadaddy]

I was going to suggest an optocoupler but...Meh

 

[Mike_2545]

I was going to suggest an optocoupler but...Meh

I'll post it again

Notice the opto-coupler...

 

[shingadaddy]

https://www.electro-tech-online.com/custompdfs/2009/03/MID400.pdf

 

[Mike_2545]

Very nice. Did not know they had such a thing...

 

[shingadaddy]

Gotta love the web... And Digikey.

 

[Mike_2545]

Still a bit pricey compared to the handful of components on my sketch ($3.50 to $4.33 vs 2.00).

But probably easier to design around...

 

[shingadaddy]

A small gap there indeed but make it up pretty quick figuring in BOM list savings (what you have to STOCK), assembly time and not to mention real-estate. Big on getting 2 pounds in a one pound around here.

 

[Mike_2545]

I bookmarked the page & downloaded the spec sheet. When I run low on high voltage caps and zeners I'll order up some.

I love this place...

 

[umer27]

Well Its a simple and ready made solution, dont have to build anything really.. I dont know about you ,but here I can get a relay and its socket for less than a dollar ... but yr right about the solid state thing..