ESP8266 Community Forum

- Wed Apr 12, 2017 7:23 pm #64896 My ESP12E makes strange noise on the PCB while its working. (Like a buzzer, and it ticks, too)
Please help me to find out what could cause this!

- Thu Apr 13, 2017 6:21 am #64906 It might be a defective component that vibrates when current flows to/from it. I'm thinking maybe a ceramic capacitor. Just a guess.

I have never heard anything like that at the low power the module consumes. High power stuff I have.