Projects

pHoenix - Professional Quality Spectrophotometric pH

The open-source spectrophotometric pH sensor by pHalkon Industries

by Jonathan A. Pfeifer

Oceanography · Hardware w/ Firmware · pHalkon Industries CERN-OHL-S-2.0

pHrog - Handheld Spectrophotometric pH

An ultra-low cost Build-It-Yourself spectrophotometric pH meter.

by Jonathan A. Pfeifer

Oceanography, Chemistry · Hardware w/ Firmware · pHalkon Industries CERN-OHL-S-2.0

diylow-costphspectrophotometric

OSPREY (Open Science Platform for Research Engineering Yields)

The open platform to help facilitate open source engineering in science.

by Jonathan A. Pfeifer

Misc · Software · pHalkon Industries AGPL-3.0

Low-Cost Depth Sensing Module For Deep-Water Instruments

A low-cost, durable depth-sensing module capable of providing approximate depth readings for underwater instruments submerged up to 2000 meters.

by Nikolai Nekrutenko, Jonathan A. Pfeifer, V. Hunter Adams

· Hardware · Cornell University· WHOI CERN-OHL-W-2.0

depthpressuresensor

Presens USB-C Comms Board

A alternative dev board for testing Presens OEM optode meters that runs the serial port and power through a standard USB-C cable

by Jonathan A. Pfeifer

· Hardware · Woods Hole Oceanographic Institution CERN-OHL-S-2.0

Panda Driver Uno

A stepper motor driver board plus firmware for the silent step stick 2209 in an Arduino uno form-factor.

by Jonathan A. Pfeifer

· Hardware with firmware · Woods Hole Oceanographic CERN-OHL-S-2.0

motor driversilent step stickstepper motor