Safe In-Wall AC to DC Transformers??

[Sparkman]

@petewill said:

@Sparkman

the fuse should be after the varistor in the circuit

Ok, I'm still a little confused. Are you saying it should be 120VAC -> Varistor -> Fuse -> HLK? Or, 120VAC -> Fuse -> Varistor -> HLK? I thought it was the second one but maybe I misunderstood.

Sorry, the wording I used was unclear and was based on the 120VAC being on the right in your diagram :-). Yes, it is 120VAC -> Fuse -> Varistor -> HLK.

Cheers
Al

[petewill]

@Sparkman Great, thanks! The parts have been ordered. Can't wait!

[Fabien]

@ceech said:

This one is not "safe", but it is an In-Wall AC to DC converter. Transformerless. With a 3A Solid state relay:

The converter output is 3.3V at 100mA and the solid state relay is a Triac.

Do you have some shcematic of this board ? I'd like to adapt it for 2 relays

[Cliff Karlsson]

Can anyone give me ebay-links to the parts I need to order to use the HLK with 230V.

I am getting a little confused about all the links.

[rvendrame]

This is the one I sent to be reviewed:

http://www.aliexpress.com/item/Free-Shipping-1pcs-lot-HLK-PM01-AC-DC-220V-to-5V-mini-power-supply-module-intelligent/32408565688.html

[Cliff Karlsson]

Ok thanks, but I meant the fuses, varistors and stuff.

[petewill]

@Cliff-Karlsson
I haven't tested any of these parts yet but this is what I ordered. I am in the USA so this is spec'd for 120 VAC. If you're using 240 you will need to change the size of the Varistor but everything else should be fine for 240.

Varistor for 120VAC - http://www.ebay.com/itm/321024816822?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

73°C Thermal Fuse - http://www.ebay.com/itm/221560426284?_trksid=p2057872.m2749.l2649&var=520415979885&ssPageName=STRK%3AMEBIDX%3AIT

250V 300mA Slow Blow Fuse - http://www.ebay.com/itm/111433875797?_trksid=p2057872.m2749.l2649&var=410420838583&ssPageName=STRK%3AMEBIDX%3AIT

HLK-PM01 - http://www.ebay.com/itm/351418782712?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT

[ceech]

@Fabien @DrJeff Here is a link to board and schematic files for the transformerless AC-DC converter:
https://github.com/ceech/AC_SR087

[MartinP]

Would this varistor work with 240v?
http://www.ebay.com/itm/10-x-Zinc-Oxide-Varistor-250VAC-60J-2500A-10mm-/260848704608?hash=item3cbbcb5c60

[DrJeff]

@ceech can't look at the files right now is this a dimmer switch that is transformerless?

[ceech]

@DrJeff Yes

[DrJeff]

@ceech Thanks yet again!

[petewill]

@MartinP Based on my limited knowledge, yes, that should work. Maybe someone else can chime in to confirm?

[Fabien]

thank you @ceech

[Sparkman]

@petewill said:

@MartinP Based on my limited knowledge, yes, that should work. Maybe someone else can chime in to confirm?

I would personally go with a higher voltage rating. Something like 15-20% higher than your normal voltage otherwise you may get regular nuisance trips. So for a 240 VAC system, I would use something close to 290V.

Cheers
Al

[petewill]

@Sparkman Thanks!

[RJ_Make]

:stuck_out_tongue:

[Yveaux]

@ServiceXp :+1: long evening ahead :satisfied:

[Steve Caster]

Hi all,

I was wondering, I want to be able to adress my blinds using mysensors. Using the relay, radio etc works fine, yet I am still wondering on this power supply. So using the above component I basically prevent fire by using the thermal fuse and an overload by using a regular fuse, the varistor and the HLK.

Now, I am using a Nano (I have still 15 of those) which appear to be using 230mA, the radio itself and a relay. The relay (from the spec sheet) uses 180mA. This should be ok to be used with the HLK shown above. Now, my main concern is, how do you make a all sit together nicely? Is there a PCB type of board you are using? Any pointers welcome :)

Kind regards

Steve

[filipq]

Hi Steve

this may be useful http://forum.mysensors.org/topic/1540/110v-230v-ac-to-mysensors-pcb-board

Regrads
Filip