Can you power Nano from 3.3v output of Uno?

Projects General Guidance
1

Very new. Sorry if my question is confusing.

I want to control a 12v DC motor remotely through Arduino Cloud. I have a basic circuit that works using the Uno. I know that Uno isn't compatible with the cloud, so I was thinking I could connect a Nano to my circuit via the 3.3v power output on the Uno, and use the Nano to communicate to the cloud and pass some kind of variable through to control the motor. It would be a simple on/off variable.

Is this possible? Or is should my project be redesigned altogether? Thanks.

2

Just read the technical specifications, the datasheets regarding the UNO 3.3 volt output.

3

No.
The UNO 3.3 Volt simply is not designed to handle another microcontroller board.

4

Is there another question here?

The Nano is functionally identical to the Uno.
Maybe you can migrate the whole project to the Nano (for several reasons), or in a pinch - you can stay with the Uno, and drop in some level conversion…

We really need to know more about why you’re doing this. It’s probably not necessary.

1 Like
5

I suspect that the OP is talking about a Nano 33 of some kind. Still pulls too much I expect to be able to be supplied from an Uno.

6

Yes. Use whatever processor you like that can connect the cloud, and have it control the motor. You need a motor driver in any case.

7

Thank you! I think this is the answer I’m looking for. If I’m able to just replace the Uno with the Nano then that sounds like the best solution.

8

If you are referring to "the cloud", then presumably you mean the "Internet" and likely want to access it by WiFi.

I which case you are best to forget Arduinos as such, and use an ESP8266. The WeMOS D1 Mini would be a good start.

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