Should I make 12 V and 3.3 V ground isolated from each other?

Find the attached schematic

Hello When I am connecting 8 relay to output of ULN2803 and controlling it with 3.3V to the input of ULN2803. The problem is that when I am controlling 12V relay it is effecting the operation of ES32 .Please tell me the solution

I think the schematic is OK, and you may check your code with respect to the GPIO init. You can post the code if you like. Also the GPIO may suffer noises from other part of the board. In this situation a larger value of the capacitor will help to solve the problem, e.g. 1uF. When I removed the cap...

I tried it with larger capacitor also but it is not working . I found that this problem occurs when I am switching the AC load using relay.I have connected 8 relays to ULN2803 IC . When I am switching the AC load ,it is triggering the interrupt connected to the push button. There is no connection be...

Hello , I have attached push button switch to GPIO16 of ESP WROOM32 as shown in the figure. I am using GPIO16 as interrupt pin. On the falling edge of switch I am performing some task. But the problem is that GPIO16 is automatically triggering this task after some time without touching push button. ...