Control panel for wood train components

The control panel is a simple modular circuit that contains a battery holder for two AA pencil batteries, a main switch, and several switch modules. The first module is connected to battery power through the switch, and subsequent modules are connected in parallel. Each module contains two microswitches and an output connector (terminal). The controller switches one or the other microswitch, changing the polarity of the output voltage. 3D Printing These three parts form the complete enclosure, choose an appropriate material color: boxtop.stl boxbottom.stl bat_cover.stl These parts are not visible, any material and color may be used: BatteryHolders.stl N times arm.stl [Fig. slicer] N times spring.stl Material: PLA, PETG, or other Layer thickness: 0.2 mm Support: Support on build plate only The spring should be printed from a more flexible material, e.g. PETG: Each control lever should be in a different color. I recommend printing together with the turnout switch blades. N times knob.stl