You know, standardized platform with the motors and the battery when it operates, little solenoids that will lock it in place and get low-voltage power.
And if you add some pneumatic pistons connected to a mini pressure intake controlled by a solenoid valve triggered by an RF remote, then you could shoot the ball normally.
This torus has a set of toroidal electromagnetic coils wrapped around it, paired poloidal coils above and below it, and a solenoid running through the middle.
The Casio brothers decided to build their Casio calculators off a device called a " solenoid." So, a solenoid is basically a metal sort of plunger inside an electromagnet, so just a coil of wire that runs round it.
And the reverse is true for the magnetic field caused by the infinite number of currents along the bottom of the solenoid which are all going into the screen and in red.
If you curl your right hand around the solenoid so that your fingers point in the direction of the current running through the loops, your thumb will point in the direction of the magnetic field.
So, every time you typed in a digit, some solenoid would move, that caused another switch to close, and there would be a cascade throughout the calculator to set the number.