I am having difficulty getting clean signal from the Ganglion. I have followed instructions from the Ganglion Getting Started guide, including placing the D_G and REF electrodes on my earlobes and mat

you can try reducing the gain for your problem channels to 12 instead of 24. Railing is at the hardware level. My understanding is that your DC offset for the railing channels is too high/different fr

I purchased a Cyton, Daughterboard, and Professionally Built UltraCortex Mark IV EEG Headset, and have not been able to make it work correctly since it was purchased.  At first I was having troubles w

Just as before, I notice that if I touch the daughter board, I get different results.  Sometimes channels 9 thru 16 show RAILED.  If I touch the board, then I will get some readings on a couple of the

-With all electrodes removed, channel 1, 2 and 3 show "normal" values (around 10 uV) and the 4th channel is immediately RAILED.

Yes I tried light, medium and hard tightening on the scalp. In fact when I tight them (when they start hurting quite a bit), the signal goes railed. I loose the tightening a bit and sometimes the inco

Re: noise, yeah it doesn't make sense. Even more why are others RAILED as well ? All wires are from OpenBCI, nothing is bought separately. I also used wires from the 3 bunches (short/medium and long),

Screenshot 3 - All channels enabled... some railed and others don't make sense.

I switch on the GUI, and wear the cap and start to tighten the electrodes, until I feel them gently pressing, however most readings where either RAILED, NEAR RAILED or with a high UV (14+) or fluctuat

I only get a few sensor and most of them show railed. If I wiggle the connection pin on the board a bit I sometimes get a signal, which quickly goes away again. I was only able to get signals on all

When I started the test I saw signals on OpenBCI_GUI, but some of them were written RAILED instead of the uV. During 1 minutes it was possible to see some brain waves even with the word RAILED. After

Your 0 uV test sounds OK. What did you then see after attaching electrode to scalp and SRB2 / Bias on ear lobes? Is that where you saw the RAILED? Can you clarify what you mean by "after 1 minute

I have had a problem since last week with my openbci board. In the beginning of the recorded file the signals were ok but it is written NEAR RAILED or RAILED, and after almost 1 minute of test there i

I'm in a similar boat, though my kit just arrived. I assembled it and ordered my paste. Now I'm trying to make it actually work, which I haven't yet accomplished. I keep getting a "Railed" n

I just got my Mark IV, put it together, downloaded the OpenBCI software and the Ganglion Hub to my Mac, plugged in the dongle, opened the GUI, connected to /dev/cu.ubserial-DQ007O7O, pressed Start Sys

Usually a RAILED condition means the electrodes / cables are open / bad. Have you tried swapping with known working channels? Check the cable continuity with an ohmmeter.

I take it the board is bricked or something I have no activity at all 2 / 7 as before both of these channels say RAILED. Any one else have any suggestions please.

there is no activity at all and 2 and 7say RAILED, I am hoping this is because the checksum failed and it is just a case of keep trying to upload.

Could you tell me the mechanism of showing railed? 8 channels tend to turn into railed altogether, even some channel show the right wave shape after "railed"

all just work, but suddenly, all channel become railed.