Well the inductors came in today, and no luck. I am using two ceramic capacitors of .1uf 50v, and two 100uH 1A capacitors just as in the picture, and the switch still doesn’t operate properly. I guess I now learned what the difference is between the really cheap USB chargers and the name brand ones.
This is the most confusing part of your original post. Which ESP are you using and how are you powering it? If it is a NodeMCU, then it already has a pretty good Power Supply built in. If it is an ESP9266-01 then the power in has to be a clean 3.3V.
Stevemann, I am using the ESP8266 D1 Mini. It is basically an ESP8266 with a mini shield with mini usb plug. I am using very cheap USB power adaptors to provide the 5 volts needed. I am powering the ESP8266 by putting the 5v on the 5v pin. Everything seems to work fine with these cheap USB adaptors except the touch sensor switches. If I try with a different (better quality) USB adaptor the touch sensors work well.
The ESP8266 D1 Mini is another variation of the NodeMCU family. Like the other NodeMCU’s, It does have a decent 3v3 supply, so if your cheap wall-wart is giving you problems, I wouldn’t even try to fix them. Trash them.
When you measured the 5v from the wall-wart, was it plugged into the D1? The no-load voltage is pretty much irrelevant.
Hello again. It seems I want to complicate things too much, but space in outlets here in Mexico is very very limited. All houses are made of centerblocks and concrete, so not much room to play with. On the ceiling I only have a square about 3.5 inches by 3.5 inches, and about 2 inches deep, and there are already plenty of wires going through that area.
I was looking for the cheapest and smallest way to go from 110v to 5v, and those small wall-wart plugs are the smallest I’ve seen (green leaf brand), they are about 1 inch all the way around.
When I measured the 5v I was checking the 5v pin and the 3.3 pin, but since the power is going in through the 5v pin, and that is where I check I don’t think I get to see the V on load.
I have given up on the touch sensors for now. I did the installation using two pin push buttons, but I am also having trouble with those. In fact I am about to start a new thread to see if I can get some help with that.