The 2021-2022 11th Grade STEM class named the "solar test station" LIGHTSPEED.
Solar Test Station
Designed for a 4th Grade Solar activity. The 11th Grade STEM research class designed this test stand to perform an experiment in the elementary STEM classrooms. Each test stand contains two motors connected independently to two solar panels. The intensity of the simulated sunlight (a 60 watt reflector lamp) can be measured by counting the rotations of the wooden discs mounted on top of each motor. Students can make observations from both sides of the test stand.
4th Grade STEM students were tasked with making observations on how fast the discs on the motors would spin when different colored gels were placed over the solar cells. Their experiments led them to believe that the various colors allowed different amounts of light through and the reduction in light transmitted through the colored gel created less electricity and thus the disc would spin slower.
The image on the left shows the test stand with 60 watt reflector during a safety test to see how much heat may be produced. On the right a test of the motors using the same 60 watt bulb.
While many hours went into the design and testing for this project, the shape is not integral to the experiment. The STEM Research students designed this test platform to be laser cut from 1/8" birch plywood and easily assembled. The main design criteria was that the entire stand must be able to disassemble and store 6 test stands inside one plastic storage container. A total of 24 test stands were build, assembled and tested before being deployed at 4 elementary schools.
Components can be found on Amazon:
Solar Panels (two)
Motor (two DC 3V 250RPM N20)
Reflector Lamp (8.5 Inch Reflector, up to 150W E26 Socket)
Incandescent Light Bulb (any brand 60 to 100 watts)