Circuit Happy was founded in 2017 by Ed Guild as a way to both create new electronic hardware and to design and build custom electronics installations. In 2025 Circuit Happy became a partnership between Ed Guild and Matthew Campbell. Matt joined up to help Ed see through some of his more ambitious plans.
About Ed
Ed’s background in electronic music, live performance, and graphic design gives him a visual and musical perspective when approaching the design of electronics.
Ed has DJ’d, VJ’d, and performed with bands since 2001. He first got involved with bands to explore live video projecting, aka, being a Video Jockey (VJ). From there he got more and more interested in live and studio sound technology. He is especially interested in groups that bring the studio to the stage, using unorthodox gear that is normally not used on stage. The natural progression is now to create hardware for music and light-making.
About Matt
Matt originally started helping me in 2020 to transition to using a contract manufacturer to build ML:2. He designed the PCB layout and then helped communicate the design to our contract manufacturer. Matt then designed and built a system to test and flash the final assembly with the release firmware. Matt also gave me lots of guidance on coding for the FreeRTOS system on the ESP32 platform. He now heads up our technical designs and makes things ever so much more professional and qualty.
Collaborators
Circuit Happy teams up with various talented friends, depending on the needs of each project.
Nick is the technical consultant on The Missing Link project. But that title falls short of describing how crucial Nick was to this project. Nick took on writing most of the C++ code base for the original Missing Link Desktop along with aiding and guiding me through the circuit board design for Missing Link. During the development of The Missing Link Junior we hired Nick to rewrite the codebase to have a tighter architecture that gave us a great foundation upon which to write new features.
Karl is a Unix ninja who showed me the ways of bash scripting, cool file system tricks, and system optimizations. Without him, the original Missing Link Desktop would not have a Software Update tool, and it would have taken me ten times longer to set up each system to be ready for sale.
Mikey Maker is a talented screen printer in the Boston area. He printed my product boxes and also the faceplates for the original Missing link Desktop. Without his skills, Missing Link wouldn’t look as cool as it does.