/challenges-projects/design-challenges/smarter-life/b/blog/posts/smarter-life-challenge---the-henrietta-project---furnace-interfaceDesign Criteria and FeaturesThe Henrietta Project includes standard environmental control outputs for controlling a furnace, a fan and an air conditioner.Standard furnace controllers operate on 24Vac, so the outputs must be 24 Vac.Standard home contren-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/smarter-life/b/blog/posts/smarter-life-challenge---the-henrietta-project---furnace-interfaceThu, 02 Jan 2014 20:21:47 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:1559dec1-376e-401a-8ba7-d72932fe8260DAB0<p>Good update.</p><p>I agree with your decision to do the optical isolation.</p><p>Furnace power supplies may not be as steady and noise free that a good bench supply.</p><p>&nbsp;</p><p>DAB</p><img src="https://community.element14.com/aggbug?PostID=16428&AppID=105&AppType=Weblog&ContentType=0" width="1" height="1">