Berkeley Center for New Media
Professor Eric Paulos
Professor Eric Paulos
Assorted research projects with Professor Eric Paulos.
For the development of these tools, I am responsible for mechanical design, electrical design, and microncontroller programming.
Air particle counters. How do these things work anyways?
Initial test bench with room for an adjustable laser holder, photodiode, and light trap
The original handcut cardboard iteration, and the improved laser cut design. One design improvement over the initial iteration is that all parts are fabricated with the laser cutter (as opposed to having parts laser cut, hand cut, 3D printed)
Preliminary data showing talcum powder in air captured with the laser-cut enclosure and an analog filtering circuit on a breadboard. Y axis: 0 to 5 Volts. X axis: time.
Third hardware iteration. The length was significantly reduced by moving the laser directly over the air outlet. Less adhesives more fasteners.
My first PCB! Analog filtering circuit to condition the signal from the photodiode. Instrumentation amp => DC Block => active low pass => cascaded notch filters.
SMD edition of circuit. Through hole potentiometer while waiting for SMD version to arrive.
Exploratory Sensing
