Safe In-Wall AC to DC Transformers??

[petewill]

@Yveaux Thanks. I was hoping there would be a cheaper way to get these. With shipping it's pretty pricey. Probably not as pricey as a fire though...

[Moshe Livne]

@petewill I have a supplier on ali that sells meanwell reasonably cheap. I used to buy all the power supplies for the LED lights I made from him. I will ask him for a quote. The downside is that he ships everything DHL.... still might be cheaper. where are you located?

[petewill]

@Moshe-Livne Ok, thanks! I live in Colorado, USA.

[jemish]

so finally....plz...tell me which power supply is the best to put inside in the wall?

I want required 5v for Relay, arduino mini, and radio.

[Moshe Livne]

@petewill My supplier is not selling these :-(
apparently they are new
@jemish It is still a work in progress. @didi will do some tests and we are trying to get some more for testing.
Based on http://www.lygte-info.dk/info/indexUSB UK.html I would choose the apple one (http://lygte-info.dk/review/USBpower Apple USB power adapter UK.html)... But YMMV. I am not sure it has OTP

[Yveaux]

@jemish Be safe and buy something like: http://www.recom-international.com/pdf/Powerline-AC-DC/RAC03-SCR_277.pdf
Live on the edge (having a decent fire insurance) and tear down a USB charger or buy one of the few $$ versions from China .

[Moshe Livne]

I have asked the guy who made this excellent list to test the meanwell - hopefully he will oblige. I still haven't been able to find anything with OTP even remotely in this price bracket....

@petewill said:

@ThinkPad Thanks for posting. It's good to see how the tests are performed. Unfortunately I don't have the equipment or skill to know how to test. Hopefully we will be able to find a safe one that we can all use.

@Moshe-Livne have you been able to find the meanwell chargers from anywhere besides jameco?

[jemish]

@Yveaux this RECOM AC to DC converter will safe or not for put it to in the wall.

because I have to start live HOME Automation.

[Yveaux]

@jemish Its dimensions are especially chosen to fit in a standard round wall enclosure; its round and very flat, so it can be mounted behind a switch or some electronics inside a wall.
here you can find some use cases.

[jemish]

@Yveaux thank you for your reply....
You mean that I can put this RECOM inside the wall box...behind the switch board.

[Yveaux]

@jemish yes

[jemish]

@Yveaux where may I can buy it?

[Yveaux]

@jemish Depends on where you live. I bought mine from Conrad, and I know Farnell and Mouser also sell it.
Just google for some local suppliers.

[Moshe Livne]

@petewill @didi found a cheaper source:
http://www.tme.eu/en/details/gs05e-usb/mains-power-supplies/mean-well/
shipping to the US 9.90. still ridiculously expensive but not as bad as mouser

[scalz]

@Moshe Livne: interesting. I didn't know that tme has it. They have nice enclosure too, like those for wall ac adapter http://www.tme.eu/en/katalog/enclosures_100431/#id_category=100628&s_field=artykul&s_order=ASC&page=1
I live in EU. And for shipping I think they are good, regarding Rs, farnell, and mouser too. But not the same catalog unfortunately.

[Moshe Livne]

@scalz these are new i think and beibg propagated to shops. Every time I search i get more....

[Didi]

Powersupplies arrived :smiley:

[Moshe Livne]

@Didi sharpening your knives and putting the plier in the fire?

[scalz]

aaaaaaah, you are lucky, I have not received mine yet!!!
I am thinking about something for OVP and OTP:

• at my job we use MCP9509 for OTP. As OTP is for output load (and not for input I think), it could be possible to use MCP9509 and P Mosfet to cut off the load if any temp problems occurs. I think it could be sufficient like this.
• for OVP, why not using a varistance at the input??? And then if a problems, your fuse in your electrical service box would blow.

I think this module has others protection.. so maybe it could do the job. I am not sure but like this I think it couldn't burn. It is just an idea as I am not expert. But can't wait to see how it is inside!!!

[rvendrame]

Mine arrived too. But I don't have equipment / knowledge to test it properly. So I will go for "real-life test". The wall boxes / wires here are fire-proof (and placed into brick walls), so the risk of real fire is reduced.

And I'm running my Arduino-dimmers for 6 months now, all powered by really cheap phone charges, so hopefully these modules will be a bit safer ;-)