I am looking for a compact solution to convert some 220V/20amp AC to something edible by our arduinos (like 5V/2amp DC). I would like to plug directly my arduino to the wall. I found many things like some Hi-link (HLK-PM01) chips ... But I also found this one :

That seems perfect, but unfortunatly, I can not find any tuto or example of use for this, shipping included, really cheap chip.

The datasheet is here.

What do you think about it ?

  • " I would like to plug directly my arduino to the wall." - Why? What for? If you want to power the Arduino you could use one of these. If you want to sense 220VAC try this. – James Jan 29 '16 at 1:51
  • Where will you source the transformer from? – Ignacio Vazquez-Abrams Jan 29 '16 at 1:51
  • The goal is to create a compact prototype which can be pluged into the 220v (France) wall plug. Don't you think the LNK564DN should do the job to give the prototype the current it needs ? Thanks. – Charaf Jan 29 '16 at 2:15
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    The LNK564DN is the controller for a power conversion circuit. To use it, you also need four diodes, four capacitors, three resistors, a special transformer, and a circuit board. You can get an "AC 100-240V 0.3A DC 5V 2A EU Plug USB Power Supply Adapter Charger" on Ebay for $1.74 with free shipping. – James Waldby - jwpat7 Jan 29 '16 at 2:50
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    So you are powering the nano not sensing the 220VAC. Like @Jake C told you: It's dangerous. We use an off the shelf power supply, or a wall adapter. That's the best solution but it's over to you whether you take the advice. – James Jan 29 '16 at 2:58

What do you think about it ?

If you have to ask, don't do it. Mains voltage can be dangerous and should only be done if you know what you are doing and how to be safe. The best choice is to just use pre-built adapters from reputable sources.

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  • It is a good advice. Thank you. But I think I can take the risk, it's for learning purposes =) – Charaf Jan 29 '16 at 2:20
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    Buying random chips from China and asking on internet forums is not the best way to be learning about how to work with mains voltage. – Jake C Jan 29 '16 at 2:22

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