Wires Color on Pre-Assembled Ultracortex
Hi, we ordered a Pre-Assembled All-in-One Biosensing R&D Bundle recently. However, the wiring that came with the pre-assemble Ultracortex Mark IV Cyton+Daisy did not match the wire colors on listed on https://docs.openbci.com/AddOns/Headwear/MarkIV/
Electrode--Wire Color--Cyton Board Pin
Ear Clip--Black--Bottom SRB pin (SRB2)
FP1--Grey--Bottom N1P pin
FP2--Purple--Bottom N2P pin
C3--Blue--Bottom N3P pin
C4--Green--Bottom N4P pin
etc...
instead we are seeing this on the pre-assemble set sent to us
Electrode--Wire Color--Cyton Board Pin
Ear Clip--Black--Bottom SRB pin (SRB2)
FP1--Purple--Bottom N1P pin
FP2--Grey--Bottom N2P pin
C3--Green--Bottom N3P pin
C4--Blue--Bottom N4P pin
etc..
should we swap out the wires so that they matched the colors stated?
or should we just ignore the color mistakes?
will it give us problems further down the road?
many thanks!
Comments
Lei, hi.
So it looks like the wire colors are just swapped left / right, from what they should be? Mentioning @Shirley, as this may be an issue to be raised with the assembly crew.
What is more important than the colors is the mapping between 10-20 scalp location and the Cyton channels (pins) used. By maintaining the mapping you apparently already have (which is correct), the GUI head map will show the correct head / 10-20 display matching your headset. You can test this by donning the headset, viewing the Head Map widget, and tapping on one location at a time. Does that give the correct appearance?
Regards, William
They're simply different colors to help the user differentiate between 10-20 locations. You can swap out cables as you wish*.
*Note William's comment below
The color mapping does correspond to that used on some of the GUI displays, such as the time series.
https://docs.openbci.com/Software/OpenBCISoftware/GUIWidgets/#time-series
And in some other posts,
https://openbci.com/forum/index.php?p=/discussion/1087/connecting-mark-iv-to-cyton-including-daisy-board/p1
Many thanks for the clarification @wjcroft.. We have swap out and re-map the wires so that they match the color mapping on the GUI as we are using time series to monitor our data.
The colors do not have to be in a specific pattern, but when a bunch of wires are taped or bundled together it can be hard to follow a wire from one end to another without confusing it with a nearby wire in the bundle. So, color coding helps you make sure that the wire on the head in its head location is attached to the proper corresponding lead on the Cyton.
totally agreed @billh!
had to give each wire a sticky tape label so not confuse myself