Month: April 2013

Motorized Pinewood Derby Car 2013

For this year’s Pinewood Derby race I made another remote controlled car for the Outlaw class. Unlike last year, this year I spent a little more time than the few hours before the race designing and building the car.

What I ended up with was a car powered by two micro DC motors, capable of multiple speeds, forward and reverse, controllable with an IR remote.

(more…)

2013 Pinewood Derby

This year the youngest Child-Unit did the Cub Scout’s Pinewood derby again. Like last year he designed the car and I helped him with the electronics.

The fading LED was done by using a 555 timer. I believe this schematic is close to what we used. The only real difference is that R1 in that schematic was replaced by a trimmer pot so that the fade speed could be adjusted.

Power was provided by 3 CR2032 batteries connected in series for a total of 9 volts. The dome was just a scrap piece of plastic, with two metal pieces from a hard drive glued to the ends.

Unfortunately, this was one of the slowest cars at the race with a top speed of ~5.8 MPH.