Portable Potentiostat
As part of my research under Professor Masudul Imtiaz at Clarkson University, I developed a low-cost potentiostat electrochemical sensor system, combining hardware, firmware, and mobile application development to create an accessible tool for elechemical analysis with applications including heavy metal, sweat, and PFAS sensing.
The embedded system is built around a custom PCB supporting an EFR32MG12 Bluetooth microcontroller, two LMP91000 potentiostat modules, a lithium battery connector, and a voltage monitor. The hardware also features a 16-bit resolution Digital-to-Analog Converter (DAC) for voltage input to the potentiostats. The firmware supports Bluetooth control, enabling easily configurable automated experiments like Chronoamperometry, Cyclic Voltammetry, Square Wave Voltammetry, as well as temperature readings. Additional experiments may easily be defined as a voltage generation function in the firmware.
To interface with the potentiostat, I created a React Native mobile application for Android devices. This application abstracts the BLE GATT interface, allowing users to select and configure a desired experiment, initiate the test, and export results to the smartphone for further analysis in software such as MATLAB or Excel.
In developing this sensor system, I have refined my skills in:
- Embedded system design including custom PCBs
- Firmware development for Silicon Labs MCUs
- React Native mobile application frontend development
- Performing electrochemical measurements and data analysis