Sorry it took me a while to get back to you, I realize how unclear I was. But what i need is going to be used in building a 4 stage coil gun. the first stage is triggered by a switch, and the others will be triggered by seperate sensors. The sensor is supposed to turn the mosfet on when the projectile is blocking the ir beam, that will let electricity flow to the mosfet to switch the power from the capacitors to the coil, and then turn off the mosfet once the projectile clears the ir beam. I have thought about having the ir receiver directly switch the mosfet, but I think that the ir receiver wil trigger a lower powered mosfet which will trigger the larger mosfet. I am not sure what components I need, I have tried looking at them, but only found mosfets that need 10 VDC to trigger, and ir sensors that are only rated at about 1.7 V, I guess that what I need to know is what parts I need, and which configuration. Also the speed of the ir sensor does not matter, because the distance from the coil can be adjusted, but I need a mosfet because it is on/off and it is high speed, keeping variables low, is always good.
Thanks for your help.