This was a modest update and reissue of an earlier shot timer Shoot Badge designed by SeeEss, with permission. Because the original design files had been lost, I reverse-engineered the PCB design. I also rotated the board 45 degrees into a diamond shape, which allowed for alternative lanyard mounting options. The software was lightly modified as well.
The Tor Polygraph (Lie Detector) Badge was a wildly successful and popular project. It featured optical heart-rate monitoring with a graphing function, along with galvanic skin response monitoring. I handled the PCB and hardware design. SeeEss did most of the software development and marketing.
An homage to the film Sneakers. The badge featured movable letter tiles, with each badge shipping with a large selection of letters. It included a Wordle-style game with a dictionary containing tens of thousands of words.
Because the letter sockets used through-hole connections, each badge required nearly 100 hand-soldered joints. The PCB manufacturer also mixed together the 50,000 letter-tile PCBs, which meant they had to be sorted manually and carefully portioned into statistically weighted bags for inclusion with each badge. Many weeks of manual labor went into producing this project.
The letter tiles are completely passive. Each one uses a hard-coded Baudot code created by connecting or disconnecting traces.
The Tipsy Badge uses galvanic vestibular stimulation. Electrodes placed behind the ears can influence a person's balance, allowing someone to electronically “steer” the wearer.
Because of the nature of the project, a significant amount of the design work went into fail-safe features and careful software behavior to avoid uncomfortable jolts caused by rapid voltage swings. This was a particularly design-intensive process.
SeeEss developed the initial prototype and concept, handled the UI and UX, and wrote most of the higher-level software features. I developed the lower-level logic and handled the PCB and hardware design.
A small project for a mini SAO totem. It uses a switching boost power supply, making it a little more sophisticated than a basic 78XX-style regulator circuit.