Pololu switch not working, help

Other Hardware General Electronics
1

Hello guys,

I've bought a Pololu switch SV but can't get it to work 100%.
I wired it like so but couldn't turn the Pololu on:

Now I started to debug it and found at that as soon as I remove the GND wire that goes from GND on the Pololu to the GND on the Arduino the switch works perfectly. As soon as I add the black wire again, I can't turn it on no matter how hard I push that switch :wink:

Any ideas? I'm confused...

2

What is your input voltage?
Pololu switch SV work from 4.5V to 20V

3

Sorry forgot to mention, my input voltage is 9

4

Not clear what you mean - is the diagram how the circuit is when it works, or how it is when it
fails to work?

If you remove the ground wire from the diagram there is no common ground at all, which is not good.

5

Problem solved...

I had a short in my DC plug....