Fall off time vibration detection

Thread Starter

Hans Braspenning

Joined Sep 16, 2018
Hello, I have the following question.
You see below the both LED's with battery holder and the cylinder is the vibration sensor, when the pen makes a movement, the vibration of the air in the cylinder causes the electrical switch / contact.
This circuit as shown in picture below is from a lighting pen. Now I'm looking for the possibility to lengthen the lighting fall off time of the vibration detection from 10 till for example 25 seconds.

Can someone help me with this?

Thank you in advance,
IMG-0766.JPG IMG-0766.JPG


Joined Nov 18, 2016
Without actually having the circuit its hard to tell. What you gave us is a device, not a circuit. Terms have a meaning!

Its possible. 1 timer 555 with a delay of 25 sec will do.