The ecosphere project started back in high school. Originally, it consisted of a large boiling flask filled with life from a local pond and a lamp on a timer. Several issues with this design led to the development and construction of the MK II design. The new design allowed the flask to breathe off pressure and incorporated several sensors. Additionally, it contained a full spectrum 30 watt led with custom heatsink and even an LCD display for showing information and status. The project was one of the first Arduino projects and suited as an introduction to microprocessor programming. It has been running a stable ecosystem with no external influence for over a year.
The VESC remote project started as an advanced Arduino project. The original goals of the project were to develop a wireless (Bluetooth) remote to interface with the open source VESC electronic speed controller. Although, almost all these goals were achieved, it was decided that it would be better to switch from the Arduino platform to a TI integrated microprocessor and layout a custom PCB. Additionally, the housing has been designed with injection molding in mind so it can be manufactured once development and testing concludes. The project is still ongoing with a focus on the Bluetooth development. Once the software is finalized, final testing and production will begin. The remote unit will be sold to DIY e-board builders and small e-board companies.
The Omni-Directional Speaker project had two things in mind when designing. Be as powerful as possible and as portable as possible. Originally it was going to be a typical stereo box, but something about omni sound peaked my interest. The entire project was initially designed in 2D vector software and laser cut out of wood. Only recently has there been revisions made while using 3D CAD. The system features a JL audio w4 6" subwoofer with a 500W RMS amplifier, a mid range Dayton audio driver and Dayton audio BRM driver both on a dual channel 100W RMS amplifier. The power supply system is broken into two parts, one for when plugged in and one for when on battery. When plugged in, four switching supply laptop chargers run in parallel to the main rails. On battery, two packs on Samsung 25r cells of 7s2p configuration run in parallel to the main rails. There are then several boost and buck converters that take power from this main rail and give the amplifiers and other components their proper voltage. The system will output approximately 100dB at 10ft away, has a frequency response from 20kHz to 32Hz, and can run on a full charge continuously at full power for over 14 hours.
The Serpent Board project has been the most complex and ambitious project yet. Within the first year of the project, I acquired knowledge and experience about high power batteries, BLDC motors and driving electronics, CNC machining, 3D printing, advanced CAD design, injection molding, advanced electronic design, PCB reflowing, and semi-advanced programing. The first prototype board is complete and was simply a proof of concept and testing vessel. Since it, two entire marks have been designed in CAD and now Mark III is almost ready to be fabricated. This will involve sourcing materials for and pressing custom bamboo decks, 3D printing parts out of stronger materials and moving into injection molding, running fully custom electronics with automotive grade communication systems. There is a lot left to do, but this has and continues to be one of the most challenging and rewarding projects yet!