Inspired by the short-comings of my first locked-in amplifier experiment, this is my plan to revisit the subject.

My main oversight in the first experiment was not quantifying the difference between measurements, both with and without noise, and to what degree the noise would have influenced out...

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 ...

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...

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...

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 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...