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24VAC power tolerance #54

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DSpeichert opened this issue Jul 28, 2024 · 2 comments
Open

24VAC power tolerance #54

DSpeichert opened this issue Jul 28, 2024 · 2 comments
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Hardware Related to the hardware design

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@DSpeichert
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The HVAC's "24VAC" in the wild could measure up to 27-28VAC.

Honeywell T4 thermostat has tolerance for 20-30 VAC:
image
@smeisner smeisner added the Hardware Related to the hardware design label Nov 17, 2024
@smeisner
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@DSpeichert Were you citing a problem here? I believe the thermostat may handle this range of input voltages. The LM2596T-5 can handle up to 45V input and the MB6S rectifier can handle even more. So is there a problem you are seeing?

@DSpeichert
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I honestly don't remember anymore, I was likely not aware of the actual tolerance currently supported by the board. This is mostly an information/documentation thing to make keep some tolerance in the design (especially if you plan to simplify the power handling).

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@DSpeichert @smeisner