A lot of the introductory EE courses at the University of Washington require the use of two
9V batteries to power analog circuitry on a breadboard for labs, and the wires would always
fall out of the breadboards. To pass the time during my first week back before courses started
in my sophomore year, I designed a USB powered breadboard PSU that provides quiet dual supplies
that can be adjusted from +-2V to +-15V and gave one to everyone on the electronics team in the
Husky Satellite Lab: