I learned about Kelvin Doe, a remarkable 15-year old from Sierra Leone, on the Internet. A short film shows Kelvin converting broken electronic parts he scavenged from the trash into valuable items such as portable batteries for lights (intermittent electricity leaves his village without power much of the time.) He even fashioned a homemade generator to power an FM transmitter he built from local scraps. Broadcasting as “DJ Focus,” Kelvin uplifts and inspires his community …