* Electrode impedance

That reading doesn't really tell you what you want, and 4–20 MOhm between SRB and BIAS is expected — don't worry about it. SRB and BIAS are separate nets and aren't supposed to be connected to each ot

That reading doesn't really tell you what you want, and 4–20 MOhm between SRB and BIAS is expected — don't worry about it. SRB and BIAS are separate nets and aren't supposed to be connected to each ot

The giveaway is in your screenshots: all active channels sit at ~57 uVrms and go "Near Railed" together, while the impedance check shows finite values (83–466 kOhm) — so the inputs aren't fl

What you are seeing with the same amplitude on different leaves, is likely because the 'impedance' or surface resistance in ohms of plant tissue, is very low. The plant cells, filled with water and di

yes, we did because the jumper cable have excessive width we got some male to female jumper cables from our robotics lab and connected to that our cyton then the male side to the female side of the op

Please read this comment regarding acceptable Cyton impedance ranges,

Thank you for your advice. We tried it, and it reduced our impedance to below 100 kohms.

* In the OpenBCI GUI impedance/N-status check, we typically see around ~5000 kΩ impedance per channel even after all the gel application.

Happy to request impedance test video before

I'm using dry electrodes. They definitely often have poor skin contact, but I already tested them on a person without any hair and had the same outcome at one point. Also, the impedance test is workin

All signals are railed, although the impedance test is confirming low resistivity.

I'm using the electrode gel cap with the Cyton Board and while I got good SNR on the first day of use, it has dropped significantly on subsequent days and I can't seem to recover it. After the first d

When analyzing data using EEGLab, I noticed increased amplitude and strong high frequencies in channels F3 and F4. I then checked the impedance values ​​of channels F3 and F4, which were normal, aroun

Are you still seeing expected impedances? In other words has the impedance degraded over time, since they were new?

* At what point should this be considered normal wear vs. electrode degradation affecting impedance and signal quality?

By Good Signal vs Noise metrics- I meant, is there any objective measure (like impedance) to confirm the contact quality so we can say “this channel contact/setup is OK and we are getting a good sign

By Good Signal vs Noise metrics- I meant, is there any objective measure (like impedance) to confirm the contact quality so we can say “this channel contact/setup is OK and we are getting a good sign

The GUI / Cyton 'impedance widget' WILL NOT work with Thinkpulse, because that widget depends on the ADS1299 chip acting as current source on the passive (non active) electrode having direct skin cont

In the discussion above, we saw that Julien mentioned the impedance test should be correct with a x24 gain, but he didn't test it. We tested it with "no contact" with the head and it doesn't