Very cool blaster idea. Love the automatic firing option. Not applicable to V Visitor laser gun, but could be implemented for other ones. Will add that feature to my software. Implemented the INPUT_PULLUP pin method and combined it with the Ethernet shield.
Now I am activating the trigger over the Internet from my work and the laser gun is resting at my dinner table at home. Cool right?
Added for 1.0.1. Just tested and worked out like a charm. Right now testing an Ethernet shield r3. Connected it to the laser gun project and every time the server detects an incoming connection fires the laser gun. Very funny.
Right. My problem is that I will be using an unregulated power supply to feed the arduino mini pro, so I don't have a 5v power source to feed the switch. So I was thinking in re-use an available pin to do that work.
and migrated the sketch to a Mini Pro this night. Wanted to know IF It is a good practice to use an available pin to feed signal for a pull up switch. Do you know what I mean? For example, I have pin 8 and 9 free, and would like to use one of them to supply trigger switch.