I'm doing some modifications to a nerf gun, and have already done speed/FPS tests with a chronograph I built, and the next test is modifications that can be done to increase the accuracy. I'm trying to build a target that will sense the x/y position of a dart as it hits a target, or breaks a plane. I have a few ideas, but I'm trying to keep it as simple as possible.
One idea involved a mesh grid of wires, and when the dart strikes the grid, it would cause wires to complete a circuit. Problem there is thats a lot of wires (to get any sort of accurate reading), a lot of points of failure (accidental wires touching), and what sounds like a huge pain in the butt to make.
Another idea was an array of IR leds and sensors. The issue there is then I have to rig up an absurd number of IR receivers, and write an function to determine just which sensors were blocked by a dart. Sounds complicated and like a lot of work.
Are there any sensors out there that react to light (IR, laser, visible, whatever) that are like a strip, and will provide an analog result depending on what section is lit or unlit? Or a sensor that uses a spinning laser that can detect it's position/angle when the laser bounces off something?
Or am I making this a lot harder than it needs to be, and there's an easier solution than what I'm coming up with? I want to fire a dart at, or through, a target, and get an x/y coordinate reading on it. I'd like it to be moderately accurate (1/4" or 1/2" resolution?). Better is great too.