PROJECTS: SOLAR XYLOPHONE
1. ASSEMBLE THE CIRCUITS
Time: A Weekend Complexity: Hard
Putting the circuits together is the most straightforward step in this project, and it will ease us into the rest.
1a. Split your RadioShack perf board into single squares, or if you’re using your own perf board, cut it into
2"× 2" pieces.
1b. Collect and separate the parts needed to make each circuit: voltage trigger, transistor, trimpot, diode,
4,700µF capacitor, 1.0µF capacitor, motor, solar cell, a bit of wire, 2 female connection headers (optional),
and a piece of perf board.
1c. Take one group of parts and solder a circuit together, following the Solarengine schematic at
makezine.com/12/xylophone. This can be a bit tricky but it’s good practice if you want to get better at
electronics. I put the electrolytic capacitor and the trimpot at opposite ends, and included 2 female
headers for connecting to the solar cell and motor at the edges.
102 Make: Volume 12