Mark Gilliland August 2022

USB Motor Controller

This PCB drives a stepper motor or 2 DC motors using a PIC. It includes MOSFETs for driving the motors, very wide traces for high current capability, and protection and fail-safe design (e.g. digital logic to prevent H-Bridge shoot-through). I designed this before taking any PCB design classes and assembled it in my college apartment. The first revision was successful in driving a stepper motor.

RockSat PCBs (Senior Design Project)

These PCBs were created for the senior design project RockSat 2019-2020. The experiment was supposed to be in a suborbital launch in August 2020, but was pushed to August 2021 when it successfully logged data and performed the experiment in its suborbital flight.

Some PCBs were created by another team member Graham Braly. All the PCBs shown below were designed by myself.

Power Control Board

Powers up 12 different channels and monitors current draw, allowing shutdown in software if overcurrent conditions are met.

Experiment Control Board 

This set of PCBs assembles to hold and power 3 Raspberry Pi Zeros, a Teensy 4.0, and hardware to communicate to other parts of the project.

Toucan PCB

This PCB was made to help teach people (mainly middle-school students) soldering basics. It features an RGB LED whose color is changed via three potentiemeters.

BenchBuddy Benchtop Power Supply and Data Logger

See more about the project here: BenchBuddy Project Page