Jeri Janet Ellsworth (born August 14, 1974) is an American entrepreneur, computer chip designer and inventor. She gained fame in 2004 for creating a complete Commodore 64 imitating system on a chip housed within a joystick, called Commodore 30-in-1 Direct to TV.[3] It runs 30 video games from the 1980s, and at peak, sold over 70,000 units in a single day via the QVC shopping channel.
Ellsworth was hired by Valve Corporation to develop augmented reality hardware, but was terminated in 2013. She co-founded castAR to continue the work—with permission—but the company shut down on June 26, 2017 without completing development.[4][5] She started another company, Tilt Five, to create AR hardware based on the same principles.
Ellsworth has publicly talked about various homebrew projects, such as how to manufacture semiconductor chips at home.[6]