Welcome to EnviroDIY, a community for do-it-yourself environmental science and monitoring. EnviroDIY is part of WikiWatershed, an initiative of Stroud Water Research Center designed to help people advance knowledge and stewardship of fresh water. New to EnviroDIY? Start here
Showcase
Highlighting projects we’re working on and gadgets we’ve built.
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]
IMP calling sensor
A fun project was using the Electric IMP001 to communicate with an RS485 pressure transducer. The readings are delivered to the cloud and use the nice (and evolving) services of thingspeak.net. The starting point was to test the stability of an RS485 pressure sensor – and check out the then new IMP001 – two projects in one. Stability testing a pressure transducer is putting it into a bottle of wat...[Read More]
