Electronics > Projects, Designs, and Technical Stuff
ESP8266 with relays
<< < (4/5) > >>
picandmix:
Hi,

Not trying to put your design down in any way,  quite the reverse,  am trying to be helpful,  so would urge you to first build a one off prototype of your complete design on some form of soldered wiring board before sending off for a pcb.

Its so easy to miss something in your design and a  test build connected to whatever you are powering will soon show up such potential problems, if any.

hsn93:
your mounting holes.. need clearance


screw head will touch your components.



--- Quote ---How much isolation do I need (or should I have)? Is 0.5mm enough?
--- End quote ---
i would target 2mm if no distance 1mm.
look for "clearance vs creepage"
http://www.smpspowersupply.com/ipc2221pcbclearance.html
Gabriel:

--- Quote from: picandmix on December 26, 2018, 11:46:34 am ---Hi,

Not trying to put your design down in any way,  quite the reverse,  am trying to be helpful,  so would urge you to first build a one off a prototype of your complete design on some form of soldered wiring board before sending off for a pcb.

Its so easy to miss something in your design and a  test build connected to whatever you are powering will soon show up such potential problems if any.



--- End quote ---

I'm sorry if I came across rude to you... I was just trying to give the reasons behind my decisions.

I have prototyped it out roughly and it all seemed to work fine. But I don't have the exact parts so its only approximately what will be going on to the PCB.
Nusa:
Just remember mains aren't under your control. If it's 240V nominal, plan clearances for tolerating 1000V spikes as a minimum. They may only be microseconds long, but it doesn't take much to destroy your low voltage stuff if the clearance isn't there.
Nusa:
Also remember to think in 3 dimensions. a 240V mains trace going under a surface-mount resistor isn't going to cut it clearance-wise.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod