ESP8266 Community Forum

- Tue Sep 13, 2016 6:42 pm #55057 That power supply, and if you had used a USB charger, do not have any filtering that is appropriate for an industrial environment. I would use a better power supply but that still may not be enough. A proper line filter before any power supply would be a good idea.

Something like

http://www.digikey.ca/product-detail/en ... ND/4379938
The problem is this has to be put into a case. The ground connection is also important and must be used. The case needs to be grounded by the mounting screws.

I would go for an integrated filter and power supply. Like
http://www.digikey.ca/product-detail/en ... ND/3881228
And probably put an additional line filter in front of it.

I design industrial electronics for a living. Of course I would not have done what you have. But say I was just a hobbiest and I wanted to provide the functionality that you have provided. I would have use available off the shelf equipment. Do you have replacement boards available? (I hope not because what you have is pretty bad) But maybe what you have done is not so important (of value) if it fails.

- Tue Sep 13, 2016 7:39 pm #55059 Hi, there is no easy way to say this so I’ll just come out with it: After reading through the thread again, the circuit looks ok, the PCB loos ok, but looking at the photos your soldering is not the best I’ve seen and I suspect may causing some of the problems.
Whilst this may seem a little harsh, don’t waste any more money on components or time fault finding – watch a couple of videos (videos – how old am I) on soldering and then go over the board again. I think this will cure a lot of your problems.
Sorry to hit you with this, but I think your board has a good chance of working if soldered correctly.