Use this forum to chat about hardware specific topics for the ESP8266 (peripherals, memory, clocks, JTAG, programming)

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By davydnorris
#89200 Your servo would have pulled a higher current as it operated, and if you've got your board in series with it then the voltage drop would have increased across the cap, likely going above tolerances.

Make sure your servo and board are in parallel so the voltage stays constant across both