A drawing arm that was configured to be gear and chain controlled with specific gear ratios to provide quick and precision movement while drawing. It uses the NEMA17 stepper motor to move/rotate the arm, the A4998 motor driver ...
The CrowdPM Node is a mobile environmental sensing device capable of measuring PM2.5 particulate matter concentrations and tagging each reading with precise time and location data using GPS. The device aggregates samples locall...