Proper way to power ESP32 from the main supply

FaithRaven
Posts: 10
Joined: Mon Dec 30, 2019 4:11 pm

Proper way to power ESP32 from the main supply

Postby FaithRaven » Wed Jan 29, 2020 1:24 pm

I have a few ESP32 (Adafruit HUZZAH32) that I would like to power from the main supply. I'm looking for something reliable that won't burn the house down in the long term.

Before I go on a shopping spree, I would like to know what should work best:
- RPI power supply (5.1V 2.5A or 5.1V 3A)
- Anker (or similar) chargers with self-regulating amperage (e.g. 5V=4.8A -- 2.4A Max Per Port)

mikemoy
Posts: 481
Joined: Fri Jan 12, 2018 9:10 pm

Re: Proper way to power ESP32 from the main supply

Postby mikemoy » Thu Jan 30, 2020 5:03 am

Any reputable 5v-5.1v 1A wall wart will be fine.

FaithRaven
Posts: 10
Joined: Mon Dec 30, 2019 4:11 pm

Re: Proper way to power ESP32 from the main supply

Postby FaithRaven » Thu Jan 30, 2020 9:29 am

mikemoy wrote:
Thu Jan 30, 2020 5:03 am
Any reputable 5v-5.1v 1A wall wart will be fine.
That's what I've read in the HUZZAH32 documentation, yes. But the trouble is that there aren't many reputable 5v-5.1v 1A power supplies available on the market.

Would a 0-2.4A self-regulating unit work well?

mikemoy
Posts: 481
Joined: Fri Jan 12, 2018 9:10 pm

Re: Proper way to power ESP32 from the main supply

Postby mikemoy » Thu Jan 30, 2020 2:27 pm

Would a 0-2.4A self-regulating unit work well?
Any regulated 5v splly will work, assuming it can provide enough current for your board. I.E. its not a 5v 100ma supply.


There are many quality supplies.

https://www.digikey.com/products/en/pow ... ageSize=25

https://www.mouser.com/Power/Power-Supp ... ly&FS=True

FaithRaven
Posts: 10
Joined: Mon Dec 30, 2019 4:11 pm

Re: Proper way to power ESP32 from the main supply

Postby FaithRaven » Sat Feb 01, 2020 11:29 am

Thank you for the links. They do indeed have a lot of options but sadly they quickly dry up when I select United Kingdom.

I guess I'll have to do some experimentation with products I find on Amazon.

boarchuz
Posts: 292
Joined: Tue Aug 21, 2018 5:28 am

Re: Proper way to power ESP32 from the main supply

Postby boarchuz » Sat Feb 01, 2020 4:58 pm

Unless there's a large load or hazardous environment you haven't told us about, you're thinking way too hard about this. If you're anything like me you'll have gathered dozens of those little USB wallwarts from every phone, tablet, widget and gadget purchase over the years. If not, I'm sure Amazon has thousands of them to choose from for a few quid.
Anything will do.

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