Gravitrax Solenoid Cannon - Electrial circuit for the power supply

If you wanna throw a dime in my hat:
https://paypal.me/MeikDangmann
ffleurey modeled this awesome Gravitrax element and shared it on Thingiverse so other 3D printer owners can print it out:
https://www.thingiverse.com/thing:4194905

Unfortunately, ffleurey does not explain how he built the electrical circuit. Since the recommended solenoid threatens to die at higher voltages, and it has not enough force at the specified voltage, I designed a simple circuit that solves this problem.

Видео Gravitrax Solenoid Cannon - Electrial circuit for the power supply канала MakerMeik