Still noisy signal? (1.0, usb battery pack, over wifi router, Nov firmware)

@Joshua Brewster would that require soldering / unsoldering? I don't really have any tools and haven't done that since 1997. I should have a friend stop by this week to act as a test subject

@Joshua Brewster is it possible that filters on 1.0 might also remove actual red/ir changes from the stream?

I tried disabling filters F and noticed that placing a sheet of aluminum foil over the headband to cover it brings IR values to 110-120 (you mentioned low 100s would correspondent to a good signal), otherwise they are in 90s. I tried wrapping the neoprene band with aluminum foil and that didn't help, I guess having the hand around there holding the foil piece is also important.

Without filters the ratio is stuck around 0.67-0.72, with filters enabled the ratio is stuck at 0.97-0.99. I spent 1-1.5 hours combined so far and the ratio didn't budge in both cases. It fluctuates within 0.97-0.99 (filter on) but I guess the range is expected to be larger in a working (oxygenating) case. I noticed in bioera/bioexplorer screenshots the blue headband has a ratio fluctuating within the 100-107 range.

Gotcha yeah AC is really overwhelming on the V1 kits. That's definitely unusable on AC but still quite a bit better than what it was haha. Well now we know how well the filters work for the v1 kits.

Wanted to add the last graph, this time regarding AC noise on the latest firmware: tried from the laptop battery with AC power and without. Flat line portions are when AC power was OFF, spikes portion in the middle was charted when AC was ON (my Lenovo T480 doesn't come with a grounded power plug)

Yes keep at it, you should find it's different in different sites too. Fpz right in the center may not be best as its not quite directly on a lobe.

Test #3. Moved to Fp1. Made sure LEDs and the photodiode all clear of tape as much as possible. 5 minutes of breathing and concentration, score seems stubborn, I guess I just need more practice or my skull is too thick. There still seems to be a lot of signal variation around Ratio-SMA.

This is comparing mine to prettygood.csv sample data:

Okay those numbers look better. Best test is to try breathing deeply and seeing if you can start to see humps show up relative to your breathing patterns. It looks like that's the case so keep at it. You should start to get more dramatic deviations between the red and infrared intensity

@Joshua Brewster I got an assembled 1.0, Lolin based. I'll check the tape, it seemed they were fully open.

Below charts with the 01/21 firmware (without removing the headband, before messing with LEDs). Ratio seemed much less responsive, I guess due to less nose, not really responsive, I still don't seem to be able to change it yet through concentration/focus. (the photodiode was at the same location: Fpz)

The LED readings are definitely weak but this is usable, you want to see an error of about 2% or less. It's likely that the tape over the photodiode is covering it too much, you can pull it back so it's more exposed, that should make an immediate difference. LED readings in the low hundreds is what I shoot for. I just pushed an update that adds some digital filters too, give those as shot for me.