Shielding & cable study
How much do cable length, twisting and shielding change mains interference? Run simple, repeatable experiments and document the results with photos.
Possible Outcome
A practical guide others can follow.
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
Most newcomers to EEG struggle with 50/60 Hz hum caused by lead dress and loop area rather than the amplifier itself. Visual, quantitative experiments save builders hours of debugging.
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:
- Test straight unshielded leads, twisted pairs, and coax/driven-shield leads of 15 cm, 50 cm, and 100 cm.
- Use a consistent phantom or saline resistor network near a known mains source and compare 50/60 Hz spectral peaks.
- Document wiring diagrams and before/after FFT plots in a clear open README.
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
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.
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.
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.