My arduino was connecting through USB to PC (for coding). In my project I had also a second power source (9V) to power a motor through a potentiometer. Suddenly (don't know what or how) my project stop working.
I disconnect arduino from PC but I saw that the "ON" led on arduino was lighting. Thus I discovered that the analog input of potentiometer at any analogue input was giving power to arduino.
Check tha video to see yourself what I mean.
Is it possible ? When potentiometer is at 0 green led on arduino is ON and starts fading as the resistance increase.
OK this is clearly a whole different ball game to your original post.
Is that the WHOLE circuit you are using (just to be 100% clear here)
EDIT also please provide a working link to that shield (presume its a shield)
Also looks like an ESP01 is that correct ?
Also according to that diagram you seem to be throwing 9 volts at an analog pin via the buttons !
Stop that right now and take a look at the path of the 9 volts via the buttons to be sure !
