Plus I was afraid of things moving around inside of the mouse and causing a short.Īnd the back all soldered together. It could've probably been done as a 'dead bug' circuit, but I prefer to keep things a little bit neater. Also, I noticed if I made the autofire any faster the computer couldn't keep up with the clicks. These are what I happened to have on hand. The speed can be adjusted by changing the resistors. The whole thing is just a 555 timer, a 10uF capacitor, a 1k Resistor, and a 10k resistor. Next I put together a schematic of the system. I included an LED to show that I could make the LED flash using the mouses power then just connected the output (pin 3) from the 555 to the control wire that I ran from the mouse PCB previously. It's been a while since I've played with 555 timers so first I did a prototype on a breadboard. Black = GND, Green = 5v+, Red = Left Click Control wire. Then just soldered a wire to each pin as shown. Once I got inside I used a multi-meter to find a good 5v+, gnd, and a pin to control the mouse clicks. This might not be how your mouse is held together so don't blame me if you break it in half trying to force it.

For mine it was one screw then pull the top and bottom apart until you feel like it's going to break and it unclipped. I'm not going to cover that here since it'll be different with every mouse. (priced per item on sparkfun… actually it was free since I had the components laying around)įirst we crack open the mouse. The entire thing consists of very few components and comes in under $3 total.

I wanted to accomplish my goal and keep it as simple as possible. My goal was to create it as cheaply as possible and without interfering with the normal functionality of the mouse. Remember the auto-fire (turbo) button on old video game controllers? This project adds an auto-fire button to a mouse for use with video games or just clicking random things quickly (if thats what you're in to) using no more than a 555 timer, a capacitor and a couple resistors.

Auto mouse click timer