110v-230v AC to Mysensors PCB board

[Jsmit83]

@aproxx said:

Hi all,

After spending a few months on this forum and a few prototypes later, I decided I wanted to build a small but cheap PCB which could be placed in either the wall behind the light switch, or above the lamp.

Besides the boards I've seen on this forum, I wanted these boards to contain a module to go from 230v AC to 5/3.3v DC in order to power an Arduino nano and the NRF module. I eventually ended up with a PCB which is about 4 by 4.5cm. So with all components attached I'm hoping to get in stuffed in a 5x5x3cm plastic printed case.

Modules which I've used to power the board:
[http://www.aliexpress.com/item/5-pcs-HLK-PM01-AC-DC-220V-to-5V-Step-Down-Power-Supply-Module-Intelligent-Household/32319202093.html?spm=2114.32010308.4.19.8oKfZg

UPDATE: 2015/09/18
As promised, I've got an update for this project. The board has been tested in the past week, and everything is working as expected. Compared to the previous board I've posted, I have updated the following:
• Solder pads of LE33CZ have been placed a little wider apart to avoid short circuit while soldering.
• Solder pads of the resettable fuse (Fuse2) has been placed closer together to better fit the fuses of the BOM.
• Moved the NRF24L01 connector a bit away from the solid state relay. Should make it easier to solder.
• Moved Fuse2 to another location on the board, away from the 230v circuit.

Some 3D pictures (Top and bottom):

Anyone who is interested can order the PCB HERE

Some documentation, complete list of required components and all gerber / DipTrace files (in case you would like to make some modifications) can be found here: MySensors board v3.2.3.zip.

[Jan Gatzke]

Just ordered 10 pcs of this board. Great Job!

[punter9]

thanks for the update on the resettable fuses! Another rookie ?. I ordered 0.4A fuses since the 0.3A are sold out. Is this a classic dumb move thinking that 0.1A is no big deal?

[sundberg84]

HLK spec. is max input of 0.2a with small spikes tolerance to 1.0A. I also ran out of 0.3 but are now using 0.2a and that works fine.

[csa02221862]

Does the light switch need to be a SPST or can you use a pushbutton? Curious how this would work with a SPST switch. I haven't looked at the code to see what is setup.

[Jan Gatzke]

@csa02221862 said:

SPST

This depends on the sketch you flash. ;)

[NikolayCh]

Hi,

I understand that the question has already been asked, but ... Is there a possibility to adjust the scheme to the ESP8266 instead of Arduino? Anybody can tell or help - how to do it?

Regards,
Nikolay

[jemish]

yes, now how to use ESP8266 instead of arduino for the same function that we are discuss in this topics.

[toabhishekverma]

Hey Guys,
I am working on ESP8266 as well. But I am newbie to electronic designs. But in my view it should be silmple and we can replace Arduino nano with ESP8266 and remove NRF module.

One diagram and circuit is explained here http://iot-playground.com/blog/2-uncategorised/77-esp8266-internet-controlled-switch-easyiot-cloud-mqtt-api#materials

@csa02221862 you can use this cercuit with SPST buttons. But Switch will notbe connected to mains. It will be conneted to ESP8266 GPIO of (or arduino). And in Sketch (i.e code ) you have to write code based on GPIO when ever it goes 0 to 1 or 1 to 0 Relay state shoud be toggled.

I hope I make sense

@aproxx you did great job here.

I am looking to reduce its size more if possible and wish to use ESP8266. Also looking to add more then one relays to the board. In some rooms there are 3 buttons on one panel. So thinking to use 3 relays. Will it be a good Idea? I think should not matter as long as I have enough GPIO to control relays and Electric wire connectors can bear the load.

[jemish]

yes , I also thinking to use more than one relay.

[GertSanders]

Found something interesting on Aliexpress which is a drop in replacement for the HLK-PM01:

the HLK-PM03

Same size and pin locations, but 110-200 V AC to 3V3 DC.

http://www.aliexpress.com/item/5-pcs-HLK-PM03-AC-DC-220V-to-3-3V-Step-Down-Buck-Power-Supply-Module/32585760937.html

It fits my multi-power options board perfectly.

[toabhishekverma]

Nice find GertSanders ... I am planning to use esp8266 which runs on 3.3 volt... best fit ..

If we use this we may have to drop few things from 5.5 board right?
Like no need of 5v - 3.3 converter
change relay to match 3.3v like this http://vod.ebay.com/vod/FetchOrderDetails?qu=1&itemid=401045943120&transid=522355020027&viewpaymentstatus=

Anyexpert around? do we need to remove anythingelse (any capacitor?)

[toabhishekverma]

But 3.3v relay will not match the board. If we use 5.5v relay do we need to add something to circuit?

[johnr]

Hi,

Thank you for this pcb. In which program did you do the design? Do you think you can share an editable version of the design?

I would like to modify it to accept the Mean Well IRM-05-5 instead of the Hi-Link.
It is more expensive and bigger AC-DC circuit but since I hace some in my stash i would like to use them.

[Yveaux]

@toabhishekverma said:

change relay to match 3.3v like this http://vod.ebay.com/vod/FetchOrderDetails?qu=1&itemid=401045943120&transid=522355020027&viewpaymentstatus=

That's a link to your shopping cart, we don't have access to...
I'm interested in the relay, can you post a working link?

[toabhishekverma]

oops..

here is the link

http://www.ebay.com/itm/401045943120

[GertSanders]

I use the same SONGLE relays:

http://www.aliexpress.com/item/5pcs-SRD-03VDC-SL-C-3V-relay-5-feet-10A/32453591000.html

[toabhishekverma]

@GertSanders thanks for this link.
So do you have working prototype? what board are you using? I am in middle of finalising components and trying to finalise design. With little knowledge of electronics my progress is slow.
Also for 220 to 3.3v there is another converter from Olimex https://www.olimex.com/Products/Power/PWR-90-240V-3.3V0.8A/
overall its abit smaller then Hi-Link... Hi-Link abit better because all covered and less dangerous.

Please share if you have any design finalised.

[Yveaux]

@GertSanders @toabhishekverma Do you have the dimensions and/or holding resistance?

[toabhishekverma]

Sorry I didnt get your questions .. do you mean dimensions of 220-3.3v converter. Here they are.
output 2.5W 3.3V/0.8A +-0.2V size: 30x20x18mm

I am not from electronics background so didn't get what holding resistance means?