Best switch for controlling LEDs in a thrown object?

Thread Starter


Joined Nov 19, 2020
I'm an amateur electrical engineering student.
I want to embed LEDs into this Vortex Pocket Arrow and have them light up when the ball is thrown.
I need a small switch that will complete a circuit when the ball is in motion, similar to an accelerometer.
Alternatively I could just use a regular switch but I think it would be cool if it the lights were triggered by motion.
I plan on 3D printing a small cylindrical housing for a AAA or AA battery and circuit and to put the LEDs inside the whistles.
What are some components I should look into?


Joined Jan 21, 2019
vibration switch. you can buy them or make your own using springs. You'll have to figure out how to keep it from oscillating. Jeeze I had to scoll down a lot because those pictures are so big, you can resize them and if we need to see details, can click on them.


Joined Feb 20, 2016
It just so happens I have one on my desk. This was in a throw ball that has a cracked case and was outside in the rain for some time.
The dirt has not stopped this working, amazingly enough.
You can see the spring that is soldered on a bit above the board, and when dropped, it hits the pad under it to trigger the flashing LEDs cycle.