My dad is building an inch-and-a-half scale model train that runs on 200 feet of track in his back yard. The train is big enough to sit on and ride as it runs up and down the track. It is driven by a 24VDC wheelchair motor powered by 2 12v sealed lead acid batteries. Dad's a machinist, and although he understands basic electricity, he really had no idea how to control the motor speed. The answer was to use this DC Motor PWM Speed Control board from Amazon.com, along with an on-off switch with a cool blue cover, a forward-reverse switch, some wiring, and a fuse block. I printed the panel with raised lettering that I later painted with an off-white enamel. I designed and printed the orange lever to replace the little knob that originally came with the speed controller. The result was this cool looking control panel for my dad's train. I'll update this post with pictures of the entire train once my dad has it installed.
40 Amp DC motor control panel #Abstract2Actual 5:12