💬 RW-01 In Wall Wi-Fi Relay Board (2 Channel)

[openhardware.io]

https://www.openhardware.io/view/333/RW-01-In-Wall-Wi-Fi-Relay-Board-2-Channel

[mr_red]

Retraction of the Button here ist better but consider the Pin 2 of the relay is also Mains. You need more separation
If you want to learn something about safety with mains cuircuits read this (very long but informative) thread:

https://forum.mysensors.org/topic/1607/safe-in-wall-ac-to-dc-transformers

Or these for projects doing something simular:
https://www.openhardware.io/view/114/In-Wall-ACDC-Pcb-with-Relay-for-MySensors-SMD

[Cláudio Regis]

@mr_red interesting! I will make these changes as soon as possible. I really was not concerned about this as I am now. I am learning a lot since I started these projects! Many Thanks.

[mr_red]

That what the community is for. There are so many good discussions about AC-Mains safety issues and there is a lot of dipute about what is necessary and what not but it will guide you to your own conclusion. As long as you are building and sharing its great!

[sundberg84]

@Cláudio-Regis - may I suggest this link as well for more discussion about safety: https://forum.mysensors.org/topic/4175/clearance-creepage-and-other-safety-aspects-in-mysensors-pcbs. At the moment your ground plane on the left seems to be 1-2mm from the relay main - and this could be dangerous.

[Cláudio Regis]

Wow, what a bunch of useful information. I'm really happy of being part of this community. Many thanks to you guys. I've read the topics and also took a look in the @sundberg84 project. Now I'm thinking about make some changes to increase the safety, such as fuses (SSR, termal and normal one to protect against overcurrent) and varistor (to protect agains overvoltage). I already made some changes and also will order a PCB tomorrow. Feeling very optimistic!!