-
Lee Felsenstein was born in Philadelphia, Pennsylvania. From an early age, he showed curiosity for electronics and mechanical devices, setting the stage for his future innovations in personal computing. -
Felsenstein studied electrical engineering, where he gained a strong foundation in electronics, computer design, and problem-solving. His college experience shaped his experimental approach to computing and technology. -
While in college, Felsenstein contributed to Project One, working on early electronic computing systems. This experience helped him understand practical computer design and sparked his interest in hobbyist computing. -
Felsenstein participated in the Community Memory project in Berkeley, one of the first experiments in public computer networking. The project allowed people to share information electronically, foreshadowing the modern internet. -
Felsenstein joined the Homebrew Computer Club, a gathering of electronics enthusiasts and programmers. He exchanged ideas, demonstrated his projects, and helped foster a culture of collaboration and open innovation. -
Felsenstein designed the Mark-8, one of the earliest microcomputer kits for hobbyists. The kit allowed individuals to assemble a functional computer at home, making computing accessible to a wider audience. -
He developed innovative circuits for personal computers, which enabled users to build and modify their machines. His work helped bridge the gap between professional engineers and hobbyists. -
Felsenstein contributed to designing the Sol-20, an early personal computer with a built-in keyboard and display interface. The Sol-20 made computing more practical and user-friendly for small businesses and enthusiasts. -
The Sol-20 was commercially released by Processor Technology, becoming one of the first personal computers widely adopted by hobbyists. This marked a shift toward personal computing as a viable market. -
Felsenstein strongly promoted open access to hardware schematics and software code, embodying the hacker ethos of collaboration and knowledge sharing. His advocacy influenced the development of early open-source principles. -
Felsenstein spoke publicly about making technology accessible to everyone, emphasizing education, affordability, and DIY innovation. His philosophy influenced the maker movement and hobbyist computing communities. -
He explored early computer networking and ARPANET projects, contributing ideas about connecting computers and sharing information electronically, laying groundwork for modern networking. -
He developed educational programs and engaged with early online communities to teach computing skills, encouraging others to explore electronics and programming in collaborative environments. -
Felsenstein’s contributions were featured in museum exhibits and retrospectives, highlighting his impact on personal computing, open hardware, and the hacker ethos. -
Felsenstein continues to give talks and workshops on DIY electronics, inspiring new generations of technologists and makers to experiment, innovate, and share their knowledge.