Project 12 - Servo vibrates and this is read as knocks

[User827]

Hi there,

I am trying to complete Project 12 of the Arduino handbook: Knock Lock.
Unfortunately when I press the switch, the servo locks, but in about a second it unlocks automatically, without me having actually knocked. I think the vibration of the servo is being interpreted as a knock.
Any way to solve this?

Any help would be appreciated as soon as possible!

Thank you!

[DrDiettrich]

If you think that it's the servo, remove it and check again, watching the LEDs.

[vinceherman]

[DrDiettrich]

If your circuit is too sensitive, increase the threshold.