Safe In-Wall AC to DC Transformers??

[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 ;-)

[Moshe Livne]

@rvendrame would be interested to see how you wire everything together

[petewill]

@Moshe-Livne said:

@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

Cool, thanks!

@Didi can't wait to hear how they work! That was fast shipping!!

[Bertb]

Hi,
I am new here and decided to join this forum, because of this interesting discussion.
Some weeks back, I was looking for a cheap AC-DC converter and ran into the Hi-Link modules. The have very nice specs, but I discovered that there are no stamps to prove it.

I too plan to bring an offer to the gods of AC-DC, so I will build a module into a safe box and see what happens when I start annoying it.

I'd like to finish for now with a remark to rvendrame, if I may:
It is true that stone is very difficult to ignite, but fire and heat also melts the plastic coating of the elektric wires and this can lead to high currents that are just not high enough to blow the fuse in the mains fusebox and this can ultimately lead to fire elsewhere in your house.

Regards,
Bert