Step 1: Gather Materials
- small DC toy motor like the CAT# DCM-368 from AllElectronics.com shown here
- small solar cell like the CAT# SPL-61 from AllElectronics.com shown here
- some wire - ideally red and black
- a 4.5" x 4.5" piece of cardboard
- 2 markers or pens
Step 2: Solder Wires to Solar Cell
*It doesn't actually matter what wire color goes where in this case. However, it's standard to use black for negative/ground/- and red for positive/power/+ and will matter in other solar projects. So, it's good to get in the habit.
Step 3: Solder Wires to Motor
Step 4: Create the Base
Step 5: Final Assembly and Soldering
Now place the solar cell on the cardboard base. Twist the end of each wire coming from the solar cell together with the matching color wire coming off the motor. Then solder this twisted connection.
Now take it outside! This setup will only work in direct sunlight - hence the name miniSADbot: short for Seasonally Affected Drawing robot (named after a mood disorder of the same name). Experiment with different marker colors, putting something on the motor shaft to create different swooping patterns, etc. Watch a video of one in action here.