SeaLion (Otariinae)

Nothing to see here… Just beeps, flowing water, and electrical noises. SeaLion is an autonomous smart aquarium system built from scratch. It combines custom electronics, a dedicated PCB, sensors, pumps, and embedded firmware to automate fish care, monitor water conditions, and support modular expansions such as aquaponics.

EEGFrontier

EEGFrontier is an open-source EEG device designed to measure focus and attention during study using real brain signals. It uses a custom-built PCB with a professional EEG analog front-end to capture raw EEG data and stream it in real time to a computer via USB.

TheusHen's Digispark

Rustic Digispark created at KiCAD

Flux DevBoard

RP2040 + ESP32 Custom Devboard

Boros Rocket

Amateur rocket created by an 15 year old teenager

Control Pad

A multi-input industrial-style USB control console featuring 15 physical switches, dual USB-C and triple USB-A inputs. Designed to convert real electrical states into digital USB logic signals, inspired by cockpit and control room panels.

TheusHen's macropad

Trying to build a Macropad with HackClub help; A compact, four-key Hackpad built around the Seeed XIAO RP2040 and SK6812 Mini LEDs