Servo motor works when plugged into arduino but not when plugged into wall adapter

Projects General Guidance
1

Im using a servo motor in a project but since servo motors take up alot of electricity and crashes the arduino so I wanna use a external power supply but when I plugged my servo motor it doesn't work the signal is still plugged into the arduino I don't understand why it's not working

2

I guess you wired it incorrectly.

Try again. Or... read the forum guide in the sticky post?

3

Common error. Make sure the - of your external supply is connected to Arduino GND. That servo signal needs a ground reference.

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4

Now the servo makes a buzzing sound without moving

5

Please describe your PS in more detail, or post a picture of it's ratings plate.

6

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And a MG90s servo

7

A 9V supply will cook your servo. Rarely are they rated for more than 6-6.5 VDC.

8

9V is WAY to high!
You may have damaged the servo and maybe the Arduino.
5V is the maximum for an SG90

9
  1. disconnect the servo ASAP
  2. (already suggested) READ THE POST about how to get the best help here
  3. post a schematic of your setup
  4. post your code
1 Like
10

I accidentally used 9v instead of 5v they look similar : (

11

So does 12V and 24V

12

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