Safety
Read this before putting electrodes on anyone.
⚠️
JNEEG is not a medical device and has not been certified by any regulator for use with the human body. It is an engineering development and evaluation board for research and education. You use it at your own risk.
Rules
- Battery only. The Jetson Nano, the JNEEG and everything cabled to them must run from a 5 V power bank while electrodes are on a person.
- No mains connection of any kind. Not the Jetson's barrel-jack power supply, not a wall charger, no HDMI or USB cable to a mains-powered monitor or computer, no Ethernet cable.
- No diagnosis. Don't use JNEEG to diagnose, monitor or treat any medical condition.
- Implanted devices. Don't use it on a person with a pacemaker or other implanted electronic device without a physician's approval.
- Skin. Use clean, intact skin. Stop if the skin becomes irritated, and clean off gel after each session.
- Exposed electronics. The boards have no case, and the Jetson's heatsink gets hot. Handle them by the edges and keep liquids away.
Power while recording
| Setup | While electrodes are on | Why |
|---|---|---|
| Jetson + JNEEG on a 5 V power bank | ✅ Safe | No path to the mains. |
| Monitor powered by the power bank or the Jetson | ✅ Safe | Still fully on battery. |
| Laptop on battery, viewing the dashboard over Wi-Fi | ✅ Safe | No cable to the Jetson or the person. |
| Jetson on its wall power supply | ❌ Never | Connects the person to the mains through the electrodes. |
| Monitor plugged into a wall socket | ❌ Never | The HDMI cable links the mains to the Jetson. |
| Ethernet or USB cable to a mains-powered device | ❌ Never | Same reason. Unplug it before electrodes go on. |
🚫
JNEEG has no patient isolation circuitry. Full galvanic isolation from the mains depends entirely on running from a battery.
Good practice
- Charge the power bank before the session, never during it.
- Check every cable before each session. A supervisor checks the setup when students use it.
- Clean electrodes with water after use and let them dry.
See also the general PiEEG safety and liabilities pages.