In this module, students will design a safety light
system that could be used by a person running, cycling,
or roller blading. The system will use a power source
that has the least negative environmental impact.
The safety light should blink at a rate and at a brightness
that will attract the attention of motorists, and
should operate for a minimum of 20 hours before requiring
replacement or recharging. Students will also design
a package to house the circuit and battery and a mounting
system to attach the safety light for use while exercising.
DESIGN
CHALLENGE
Students are divided into two groups to design safety
light systems based on solar cells and fuel cells.
SPECIFICATIONS
AND CONSTRAINTS
- Students will demonstrate the ability to design
electronic circuits by using a informed design-cycle
process.
- Students will select a power system for safety
light system on considerations of the price of battery
energy in kWh and estimated costs of environmental
impacts.
- The finished product should be conveniently portable
for joggers and cyclists.
- Students will use proper and safe techniques
to fabricate, test, and evaluate the usability of
the safety light system.
