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Topic: Arduino with wall adapter (Read 427 times) previous topic - next topic


I'm thinking about building an "AC input shield" that plugs directly into a 110/220 wall outlet and I was hoping to get some community feedback.  I've seen a few other posts about this but IMHO they dismiss a key point:

How many (especially young) makers are not likely (or allowed) to open up their home outlets/switches to cleanly store their designs in the wall? Wouldn't it be easier to have AC plugs in the back of your Arduino module to plug directly into the wall?

This could have several other features as well:
1: Relay and Power outlet to control AC powered device, like a truly programmable WeMo or other "smart outlet"
2: Integrated battery and charger for super easy recharging of battery-powered projects or when power goes out. (probably not compatible with #1 while on battery power).
3: Integrated ESP8266 for easy wifi home automation

I initially just hacked together something that uses a similar battery pack to this:
Gluing the Arduino to the front and using a very short USB cable gets the job done, but it isn't exactly something I want to leave hanging off my wall forever, so I'd add:

4: Modular plastic housing to protect stacked shields... and make it look more pleasing.

I could 3D print low quantities in house, but I would like to look at mass production if there is enough interest. The tooling for that is expensive, which begs crowdfunding. Before I jump head-first into design, I have 3 questions:

Does something like this already exist?
If it doesn't, who would buy this? To me it seems very friendly to kids or people who just want to code.
What features would you like or not like to see in it?

Thanks in advance,


Bad idea for kids and/or idiots. Wrong mistake and someone dies. Knowledge and care required.

You can get relays to switch 10A 120/240VAC cheap, but don't hand that to people not allowed to play with power cords for any reason.

Nick Gammon on multitasking Arduinos:
1) http://gammon.com.au/blink
2) http://gammon.com.au/serial
3) http://gammon.com.au/interrupts

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