Electronics
Hope
Hope is a state of the art radio tracker that uses the time of flight of radio transmissions to at least 3 ground stations to locate its position without need for any GPS or inertial navigation.
LEO
LEO was designed with all of the lessons learned from Lyra, and borrows its basic architecture and much of its software. It is my smallest flight computer to date, and is one of the smallest computers in hobby rocketry to have a 10 DOF sensor suite. It runs a linear kalman filter on its dual core processor to estimate altitude and velocity during every stage of flight.
Lyra
Lyra was the first series of flight computers I developed. It has had six iterations, each making the board smaller and more capable.