Second annual SJ Mini Maker Faire - BANGPhotos
Kaori Yuda, 19, a student from University of Aizu in Aizu-Wakamatsu, Japan, demonstrates the application that controls a device using a phone jack, gluemotor.com, at the second annual San Jose Mini Maker Faire at History San Jose Park in San Jose, Calif., on Sunday, September 4, 2016. (Josie Lepe/Bay Area News Group)

Kaori Yuda, 19, a student from University of Aizu in Aizu-Wakamatsu, Japan, demonstrates the application that controls a device using a phone jack, gluemotor.com, at the second annual San Jose Mini Maker Faire at History San Jose Park in San Jose, Calif., on Sunday, September 4, 2016. (Josie Lepe/Bay Area News Group)