Independent noise & CMRR characterisation
Measure input-referred noise, CMRR and channel crosstalk of an open PiEEG board using your own setup, and publish the method so others can repeat it.
Possible Outcome
A public report + scripts in your own repository.
You own what you build. Publish it under your own GitHub account with your name and chosen open-source licence.
Why It Matters for Open Neurotech
Transparent, third-party bench measurements help researchers and students compare low-cost open EEG hardware against lab amplifiers using reproducible test setups.
Starting Points & Technical Notes
These are open-ended suggestions, not specifications or assigned tasks. Change the scope, combine ideas, or take a completely different approach:
- Short inputs with low-impedance resistors (e.g. 51 Ω or 0 Ω) in a shielded enclosure to record baseline input-referred noise spectra (0.5–100 Hz).
- Drive common-mode sine waves across tied inputs vs. reference to measure CMRR at 50 Hz / 60 Hz.
- Publish raw CSV/EDF recordings alongside your Python PSD & CMRR plotting scripts so other labs can replicate the benchmark.
Independent Open-Source Work
PiEEG Ltd does not take on volunteers, interns or unpaid workers. Any project you start is your own independent activity under your own repository and responsibility. Read the full ground rules →
Safety First
PiEEG devices are not medical devices. Use battery power only when electrodes are on a person, and never connect to mains power during recording. Liability & safety →
More Hardware & Analog Ideas
Active-electrode front-end prototype
Design an open active-electrode (buffer at the electrode) board that plugs into an existing open-source EEG front end, and compare it with passive electrodes.
Shielding & cable study
How much do cable length, twisting and shielding change mains interference? Run simple, repeatable experiments and document the results with photos.
Open enclosure designs
Design a printable case, battery holder or headband mount for an open PiEEG-family board. Share STL + source files under an open licence.