110v-230v AC to Mysensors PCB board

[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?

[Yveaux]

@toabhishekverma No, I meant for the relay ;-)
What's the resistance of the 3V coil? I want to know the current flowing when the relay is active.

[toabhishekverma]

@Yveaux Still no idea about it. Check link if you get something from it. what I know is it can bear up to 10A current and can be controlled using 3v .... my order still in shipping so don't know more then that.

[Yveaux]

@toabhishekverma Ah, ok. Didn't know they were still in transit.
Maybe @GertSanders has them 'on stock'?

[HenryWhite]

@Yveaux http://www.songle.com/en/pdf/20084141716341001.pdf

[Yveaux]

@HenryWhite Awesome! Didn't even think of looking for a datasheet of a Chinese relay ;-)

[Porky6666]

Another source :

50Pieces/Lot JRC-21F 4100 3V DC 6 Pins Miniature PCB Relay Brand New
http://s.aliexpress.com/MNVv2myE

[GertSanders]

@Yveaux No, also still waiting for the order to arrive. But a coil resistance of 20-25 Ohm means driving the coil with a FET. Not directly from a atmega328 pin.

[GertSanders]

@Porky6666 : only switches 3A, SONGLE relay can switch 10A.

[HenryWhite]

@GertSanders said:

@Yveaux No, also still waiting for the order to arrive. But a coil resistance of 20-25 Ohm means driving the coil with a FET. Not directly from a atmega328 pin.

Correct. Here's how I wired the songle relay on my Lithium Ion Sensor PCB:

@GertSanders said:

@Porky6666 : only switches 3A, SONGLE relay can switch 10A.

I wouldn't trust both of them when it comes to switching high amp devices over 3A. I think there is a reason no german electronics shop sells songle relays :smile:

Plus, relays from an electronics shop in your country might cost the same than the songle relays or will just be a tiny bit more expensive.

At least this is true for 5V relays. 3V relays are hard to find (at least in germany)

[GertSanders]

@HenryWhite said:

I wouldn't trust both of them when it comes to switching high amp devices over 3A.

I agree, I plan to switch lights, so my preference goes to the 10A model, just to be sure. I have used the SONGLE 5V versions, and none have ever given me reason to doubt their quality. Since I found a 3V3 powersupply I want to try building a full 3V3 board. Should be fun.