Project Musings

The Works of Steven Green

Electronic measurement experiment

Derived from Microchip’s AN1115 application note, this experiment implemented a locked-in amplifier circuit and C firmware running on a microcontroller to measure a resistance.

Initially implemented by Microchip using a dsPIC, I ported the logic to a PIC32 running on an Explorer 16 Development ...

A Portable 4-point measurement unit

While researching resistive type Graphene sensors, I needed to demonstrate their portability. I implemented a battery powered 4-point measurement unit to interpret sensor readings.

I created the measurement board leveraging an Analog Device AD7793 IC. This chip delivered most of the required fu...

Research into explosive detection

From 2010-2012, as graduate student in mechanical engineering at the University of Massachusetts Lowell, I researched resistive sensors. These Graphene sensors were being tested for thier ability to detect chemical traces of explosives. I fabricated and tested sensors coated with Graphene using phot...

Walking the Queens in Holliston

On January 17, 2023 I took my camera for a walk following light snow. With a Yashica 135mm lens mounted to my Nikon Z5 camera I peaked between houses, looked up streams, and scanned the sky.

Although not finding too much color, I spied a hawk in the trees. The hawk perched on tree branches too fa...

CNC turtle-draw script software

CNC router needs to be given instructions (G-Code) to move a tool over and around a work-piece. The first tasks I performed with the router used instructions generated by a small utility I wrote to cut out the outline of a polygon, but I wanted a more general solution.

I am writing a utility to cr...

Signal phase adjustment

I print pictures on my color laser printer (Canon LBP612CDW). When I needed to print a passport photo I found that the skin tones were off; there was a strong red shift in the skin.

In order to create better prints I calibrated my printer profile with the aid of a flat-bed scanner.

I work in Lin...