i want to use a 12v mini solenoid in my paintball gun to automaticly keep the trigger mechanism continuously turn off and on about 15 times per second. my goal is to turn it into an automatic firing paintball gun. kind of like how a led flashes but instead of the led i want the solenoid to turn on and off repeatedly as im holding down the switch. any suggestions on how the circuit works. also there is an upgrade called the egrip, basically i want to make something just like it but with only 1 mode automatic firing about 15 paintballs per second. is there a circuit i can use or one kinda similar? thanks