My plan was to use one 5v 2A buck converter on my 12v PSU to power 3 ESP8266, if I do this I get severe flickering if more than one is in use.
If I use 3 buck converters then all is fine.
Does anyone have an idea on how to stop this ?
I want to put 6 ESP8266 ideally in one box so having 6 bucks is not going to fit easily.
The wiring is the typical method as In image except the 5v powers 3 Nodemcu.
My nodemcu specifies 10v as a max on Vin. The buck convertor has a common 0v rail.
If I just power 1 nodemcu it all works perfectly, if I power all 3 they all get flicker. If I use a separate buck converter for each node mcc it also works ok.
I even tried using a regulated 5V psu to power the nodemcu’s and joined the 5v and 12v 0v rails with the same issue
It has a common ground, I have checked it.
Everything works fine with just 1 nodemcu. The problem occurs when I power 2 or more from the same
buck converter. It is very odd.