**R**emote **I**ndependent **F**riendly **F**ield-**L**ogger **E**lectronics (Also see http://en.wikipedia.org/wiki/Riffle for description of the stream bed feature "riffle") # Overview The **Riffle** is a collection of designs that take an open source approach to water monitoring, with the intent of making gathering water information easier and more accessible. (For an overview of the design philosophy behind the Riffle, see [this wiki page](https://publiclab.org/wiki/riffle_design_philosophy)). The first **Riffle** design was an [ARM-based datalogger board enclosed in PVC](https://github.com/bgamari/riffle); [Public Lab](http://publiclab.org/wiki/riffle) has supported development of an [Atmel328-based datalogger enclosed in a water bottle](https://github.com/OpenWaterProject/riffle_328). # Water Monitor Designs By now, several instrument designs have been constructed around the **Riffle**, some of which of are described in an array of Github repositories: - [Openwaterproject](https://github.com/OpenWaterProject) -- the main organization on github - [riffle_328](https://github.com/OpenWaterProject/riffle_328) -- hardware designs, instructions and software for getting started with the Riffle_328 datalogger - [riffle_328-conductivity](https://github.com/OpenWaterProject/riffle_328-conductivity) -- Design considerations around conductivity - [riffle_328-depth](https://github.com/OpenWaterProject/riffle_328-depth) -- Depth measurement circuit prototype - [riffle_328-turbidity](https://github.com/OpenWaterProject/riffle_328-depth) -- Turbidity sensor prototype - [riffle_328-thermistor](https://github.com/OpenWaterProject/riffle_328-thermistor) -- Connecting a thermistor to a Riffle - [riffle_328-i2c](https://github.com/OpenWaterProject/rriffle_328-depth) -- Connecting i2c sensors to a Riffle - [riffle_328-one-wire](https://github.com/OpenWaterProject/rriffle_328-one-wire) -- Connecting one-wire sensors to a Riffle # Sensor Designs We've started to summarize some of the approaches to sensing water parameters like conductivity and turbidity: - [Sensing conductivity](https://publiclab.org/wiki/conductivity_sensing) - [Sensing turbidity](https://publiclab.org/wiki/turbidity_sensing) # Project Status - **2016 Riffle_328 Status**. A small order of Riffle_328 boards arrived late April 2016, and were sent to Public Lab community members as a ways of testing current hardware features and direct further development.