Gaussgun on arduino?

Question

Arduino

There is an idea to assemble a 15-stage gauss cannon on arduino.
I am going to switch coils through arduino and light sensors.
That is, before entering the next coil, the light signal will be interrupted and the arduino will turn on the trace of the coil.
There are doubts whether the arduino and the sensor will have time to react.
According to calculations, the maximum speed will be about 300 m / s, the length of the projectile is about 2 cm (0.02 m) That is,
the bullet will be in sensor field 0.01/300 = 0.00006sec
Will this time be enough for the sensor to react and the arduino to switch the thyristor?
Or give me more options on how to implement it . There
was an idea to find out about the approach of a projectile by changing the inductance of the coil, but it turned out to be quite complicated and I abandoned this idea.
Thanks in advance for your replies)

Answer 1

gauss guns have low efficiency, the exact reasons can be found on fan sites, hence all the developing projects for alternative guns are lasers and railguns.
judging by the level of the question, there will be no 300m / s, you can simply start with two steps and further develop. in the beginning, the simplest sensors are enough, you can with ali. then do your own on photodiodes, they are fast enough.
with a large number of steps and / or high energy, stupid digitalpin = high does not work. there are problems of inductances, the problem of the "span of the middle" of the coil, the correct calculation of coils and voltages for them + the rest is all sorts of things. it cannot be solved by brute force code, and if there is a desire to do it cool, then it is better to start with the theory and its application at least at two steps.

Answer 2

I advise you to start by starting the steps on a timer, approximately calculate the switching intervals, taking into account the acceleration of the projectile and inductive delays on the coils.
About the reaction speed:
optocouplers (or whatever) need to be tied with an amplifier, because the signal in a short time of flight of the projectile may not have time to reach a fixed voltage;
arduinos work at MHz, usually - everything should be in order here.