As has presented in the picture above, our supervisor explained the principles and specific parameters during the first meeting. Firstly, a capacitor or several capacitors are employed for supplying current and DC resources are using to charge up the capacitors.The following part is the magnet together with the rails which used to send bullet.Once the current pass through the rails, the bullet will start to move as a result of Lorentz force.After that, two photo diodes as well as LED are installed for measuring the actual velocity of the bullet.Specifically, a amplifier circuit is linked to the photo diode and once the bullet detect the lights from LED, it is expected to obtain a distortion of pulse in the output side of the amplifier.In that case, the distance divided by the time between the two expected distortion of pulse is, theoretically, the actual velocity of the bullet.In general, the entire circuit should be assembled in a box and three switches are necessary to be applied.
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