DIY coilgun with 1 PCB for the all 10 stages. Big coils, huge high voltage capacitors and thyristor control for powerful magnetic field. Very high speed metal projectile detected with phototransistors.
Tutorial Page: https://electronoobs.com/eng_circuitos_tut87.php
My PCBs: https://electronoobs.com/eng_circuitos_tut87_gerbers1.php
Schematic: https://electronoobs.com/eng_circuitos_tut87_sch1.php
Part List: https://electronoobs.com/eng_circuitos_tut87_parts1.php
3D Case: https://electronoobs.com/eng_circuitos_tut87_stl1.php