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ESP8266 with relays
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picandmix:
Hi,

To give a better answer can you say what type of load is being used and the approximate current.

A pure resistive load like a heater will generally give less interference, while a more inductive load like a fan or solenoid can cause all sorts of issues, regardless of the relay being on a "separate" 12v supply line. ( I speak from experience on my own projects)

If you stay with a mechanical relay then google "relay contact suppression" which will show what kind of components are best suited to reducing interference.  Any such parts should be Class X or Y rated for mains voltages
https://www.allaboutcircuits.com/technical-articles/safety-capacitor-class-x-and-class-y-capacitors/
Finder:

--- Quote from: Gabriel on December 26, 2018, 09:44:23 am ---It will be switching mains voltage.

--- End quote ---

You need to increase the isolation between circuit ground and mains. Or even put some slots.
CCB:
Mounting holes?
Gabriel:

--- Quote from: CCB on December 26, 2018, 10:26:57 am ---Mounting holes?

--- End quote ---

Done :)


--- Quote from: Finder on December 26, 2018, 10:22:44 am ---
--- Quote from: Gabriel on December 26, 2018, 09:44:23 am ---It will be switching mains voltage.

--- End quote ---

You need to increase the isolation between circuit ground and mains. Or even put some slots.

--- End quote ---

How much isolation do I need (or should I have)? Is 0.5mm enough?
Gabriel:
Ok version 3, (hopefully the final version)!

Thanks so much guys for taking the time to help a noob :)

I have added some mounting holes and I have increased the clearance for the mains traces.

Once again is there anything else (hope not),
Gabriel

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