Tag: pcb design

Load Simulator for Engineering Mechanics

Posted on by yamanoorsai

Students of Mechanical Engineering at Carnegie Mellon University make use of a certain servo controller board to simulate loads on their model bridges.

The professor who teaches that class wanted more of these controller boards. Unfortunately the design files and the firmware for these controllers were missing.

I re-designed the circuit and reverse engineered the function of the controller. The video below shows the teaching assistant verifying the function of the first sample. The servo controller includes a microcontroller, potentiometer and a switch.

VOC sensors

Posted on by yamanoorsai

I worked with Professor Eric Paulos at Carnegie Mellon University on this project. This is a wearable device that can measure concentration of atmospheric VOC (volatile organic compounds). These gadgets were meant for the Clean Air Initiative in Pittsburgh and funded by the Heinz foundation.

These gadgets were demonstrated by Professor Paulos at the White House Technology Office. The sensor is interfaced to a microcontroller and runs off a 9V battery. I designed the PCB and wrote the firmware for the gadet. The video below shows its function.