Potential free zigbee switch?

[tcarnal]

I have not tried it but I am afraid there not usable anymore unfortunately im unable to test is as the unit is build in my door opening system and hard to take out

[elenril]

Hi I'm New here but saw the Potential free problem I too was having and have found a solution that works for me.
I use some Aqara LLKZMK11LM modules and those are NOT potential free without the Red Wire unfortunatelly.

As my intention was to use it to open my Frontdoor StrikeLock running on 12Vac the 230Vac on the relais could pose a slight smoke problem.
Due to the fact I have already 12Vac my thoughs where isn't it possible to power the LLMZMK11LM with this as well.
Sort Answer no not directly.
But!! after some messuring it does run on 5Vdc.
So a ac-dc stepdown converter to get the voltage from 12Vac to 5Vdc solved it.

Attached some pictures of the location to where to solder the wires to power the module.
After this mod the pins in the relay are without power and it can now switch low voltage without issue
I have placed some tape on the first 3 connectors so using them is not possible anymore.

Hope this helps some of you
Thijs

Is there any way to power it on 12VDC? I've tried it as you wrote and I think I've smoked it :/ There's no other way than reducing power to 5VDC?

[tcarnal]

I haven’t found it unfortunately
Have measured multiple points but haven’t found other than 5v and 3.3v if i remember correctly

Sucks that you might have smoked it
Hope it’s not that damaged

[elenril]

Earlier I've run some test with 9V 6LR61 battery and it looked like it works fine (the led light had blue color). But it comes out that 12V is too much. I'm wondering how long it will run on this 9V battery.

[tcarnal]

9v is already a bit much
As the two wires are solders to the pins of a capacator as these where the easiest to reach.
I can’t remember the rating of it, it’s written on there.
If the voltage is to high it will pop ( as it might have done allready with the smoke )
But as the rest of the system doesn’t drain much power I guess I can run for months on a 9v battery
I have a second one somewhere in a box not in use at the moment.
If I don’t forget I’ll have a look at it tomorrow
But for now I’m of to bed as its midnight in the Netherlands

[elenril]

In Poland it's almost 1 AM Thanks for your advices and goodnight.

[caplja]

Hello to everyone from Croatia.
I have stumble upon this site since I need to relay output triggered from Xiaomi MI home app.
I use Xiaomi Smart hub and basically the idea is to power llkzmk11lm module via 5VDC as you did. only thing I do not know iz does the coil from relay works with 5VDC?
can you please tell me
thank you


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[Thorgal789]

Hello.
I dont think

Entrée: 100-240V AC, 50Hz / 60Hz

This one ? https://www.climax.com.tw/new/prl-1zbs.php

[caplja]

Hello.
I dont think

Entrée: 100-240V AC, 50Hz / 60Hz

This one ? https://www.climax.com.tw/new/prl-1zbs.php

I know working voltage is 240VAC but I mostly referred because of post below. As i could see @tcarnal has bypass VAC input and powered directly from 5VDC. My onlz concerne is will coil from relaz work?

Hi I'm New here but saw the Potential free problem I too was having and have found a solution that works for me.
I use some Aqara LLKZMK11LM modules and those are NOT potential free without the Red Wire unfortunatelly.

As my intention was to use it to open my Frontdoor StrikeLock running on 12Vac the 230Vac on the relais could pose a slight smoke problem.
Due to the fact I have already 12Vac my thoughs where isn't it possible to power the LLMZMK11LM with this as well.
Sort Answer no not directly.
But!! after some messuring it does run on 5Vdc.
So a ac-dc stepdown converter to get the voltage from 12Vac to 5Vdc solved it.

Attached some pictures of the location to where to solder the wires to power the module.
After this mod the pins in the relay are without power and it can now switch low voltage without issue
I have placed some tape on the first 3 connectors so using them is not possible anymore.

Hope this helps some of you
Thijs

Sent from my M2101K9G using Tapatalk

[Thorgal789]

Ha ^^.
With an hack, I havn't tried on my side, but yes I realy think it s possible.

[waltervl]

This could be a good candidate. The relay seems to be potential free.

Screenshot_20220106-190200-124~2.png (372.91 KiB) Viewed 761 times

Alie link: https://a.aliexpress.com/_uVz2l3

[Thorgal789]

I think this one is working too https://www.domadoo.fr/fr/peripheriques ... igbee.html