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Prospective Opto Replacements

A project log for Forced air HVAC Smart Pseudo-Zoning

Overcome temperature imbalances in homes with forced air built before modern HVAC design using a variable speed booster fan.

ecpcEcPc 03/16/2021 at 02:150 Comments

I'm using the H11AA1 for everything because... I got it to work... and then yeah i just used it in every position in every iteration. I told myself this was good because "it reduces part count". I'm ordering 10, not 10 million but I was just lazy.  Time to for baby bird to leave the nest and find some new components.

My home base: 
https://www.vishay.com/docs/83608/h11aa1.pdf

24 VAC signals from thermostat:

This looks like a suitable analog... but requires an order of 1000 from digikey. Just not ready for that level of commitment.
https://www.vishay.com/docs/83726/tcet2600.pdf

This has similar properties and I don't know the ins and outs
https://www.vishay.com/docs/83523/k814p.pdf


Fan tachometer and 10V PWM:

Thinking about this one: 
https://www.vishay.com/docs/81135/K827PH.pdf

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