samehhady wrote:trackerj wrote:Very nice enclosure BUT:
- what is your maximum power that you expect to Switch on MAINS? No heatsink at all?
- any special reason for MOC3020? you expect also to do dimming with that module in that configuration?
- no FUSE, MOV, any protection at all for a device that will be connected on MAINS inside the wall?
- no snubber circuit ?
- no EMI filtering and all ?
- doesn't look as having proper creepage and clearance distance. Looking thru UL 60950-1 2nd Edition and IPC9592B can give you a good idea about. Actually in your case, as is PCB now, you need also to look at IPC2221A (external layers for uncoated bare board)
- For the wall light switch I am expecting to control bunch of 30w bulbs thats why I didn't need heatsink.
- I had a choice between using triac & relays, I preferred using triacs at-least for now to avoid the ticking sound & to explore if I will be able to dim the lights too or not.
- I will be adding a fuse on my next version for protecting the board, i missed that one.
- I will look into clearance distance needed honestly I am not that into designing PCBs I am more into programming
Also not sure about EMI filtering & snubbers. can you explain more how would they affect the project?
Thank you for your comments, really appreciate it.
- "a bunch" means how much in total for each MAINS Line? Looks like you have 2 MAINS switched lines there in that tiny small place?
If you have no prior experience and/or knowledge about MAINS power, I will suggest you before doing anything to read and ask around. A lot.
MAINS power is Deadly! The right recipe for a disaster.
Have a look also on my article about Triac dimming theory: http://www.esp8266-projects.com/2015/05/p3-wifi-mains-power-dimmer-switch-with.html and the following: http://www.esp8266-projects.com/2015/05/mpdmv3-wifi-mains-power-dimmer-switch.html
Will be more than happy to help you understanding the basic principles but I will not encouraging you to play with.
Available on Tindie: https://www.tindie.com/products/nEXT_EVO1/universal-ac-mains-dimmer-mpdmv41/