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Showcase

Highlighting projects we’re working on and gadgets we’ve built.

Introducing the new Mayfly Logger

It has a combination of features and capabilities that make it one of the most powerful and flexible logger platforms available.

Arduino DataLogger Board

Wanted to share my most recent attempt at a customized Arduino based (Mega2560) data logger board.  I’ve used a Silicon Labs CP2104 USB interface and also contains: -DS3231 RTC with Battery B/U -uSD Card -4MB MRAM (SPI interface) – 3 Serial Port Headers (3.3V/5V) **I left Serial dedicated to the USB, but Serial1, 2, and 3 are avail. -3.3V/5V I2C headers -3.3V/5V SPI headers All digital...[Read More]

Precision Sensor Board

I recently designed a board that incorporates digital pressure, temperature, and dewpoint sensors I’ve called the PTU board. I deal with weather balloon tracking systems and the information sent back from the radiosondes is usually called PTU data (Pressure, Temperature, and Humidity). I’ve written 2 new Arduino libraries for the pressure and temp and reused an existing library for the...[Read More]

16-channel data acquisition system

A few months ago I was asked by a researcher here at the Stroud Water Research Center to come up with an automated way to measure the voltage of 8 fuel cells.  The cells need to be electrically isolated from each other, so that requires differential measurements instead of the more common method of using a common ground for everything and then just doing single-ended measurements.  I looked into c...[Read More]

Side scan sonar: Towards a low cost benthic mapping tool

I originally learned of using side scan sonar/side imaging/fish sonar from a kayak fisherman tinkering around with a Side Scan Sonar/fish sonar device. I found more academic literature as I dived deeper: Assessment of Deadhead Logs and large Woody Debris using Side Scan Sonar and Field Surveys A Novel Approach to Surveying Sturgeon Using Side-Scan Sonar and Occupancy Modeling in Marine and Coastal...[Read More]

Wild wireless world ~ 2G or 3G

Wireless access comes in many forms – the cellular access is quite extraordinary in how useful it’s been – untethered access. There are hidden undercurrents for remote sensing M2M (machine-2-machine) – cellular technology shoals that can beach the unwary. I got beached – so I’m sharing it. Whether or not it’s on Sparkfun or publiclaboratories.org  low cost cellular modems are being discussed and p...[Read More]