Update Using red wire for power.md

[poldim]

Alternate option to power the ESP from the backup battery connector

[Kaldek]

My god, why didn't I think of this. I literally have that on my GDO.

[poldim]

My god, why didn't I think of this. I literally have that on my GDO.

Mine has been working great for years this way. I don't have a backup battery, but so long as your utility stays on, you'll have DC here.

Feel free to add this pic from the manual:

[Kaldek]

Ah, mine (MJ3800MYQ) is totally different to that. It's an internally mounted battery. I assume it uses the same connector type somewhere within the case but perhaps not. Doesn't really matter - however one chooses to safely tap into that circuit should be fine.

[Kaldek]

@poldim maybe the better question is whether we can tap that circuit if there is no battery in use. Charging circuits can get a little weird.

[poldim]

@poldim maybe the better question is whether we can tap that circuit if there is no battery in use. Charging circuits can get a little weird.

See my comment above:

Mine has been working great for years this way. I don't have a backup battery, but so long as your utility stays on, you'll have DC here.

[Kaldek]

@poldim maybe the better question is whether we can tap that circuit if there is no battery in use. Charging circuits can get a little weird.

See my comment above:

Mine has been working great for years this way. I don't have a backup battery, but so long as your utility stays on, you'll have DC here.

Oh right, well that's really good news.

[bjhiltbrand]

That's a great option! One of my Chamberlain GDOs has battery backup, one does not. :( I'll see about adding the power regulation stuff back in in a new kicad variation.