search

openyou / emokit

Open source driver for accessing raw data from the Emotiv EPOC EEG headset
http://www.openyou.org
Other
521 stars 235 forks source link

Large values #272

Closed ShaneHudson closed 6 years ago

ShaneHudson commented 6 years ago

I'm new to emokit, and am wanting to use the raw data from an EPOC+. It doesn't need to be 100% accurate, but I want it to be useable for detecting differences to show readings while listening to different types of music.

As you can see from the screenshot, the values are coming back much larger than expected. Am I interpreting them wrong? Or is there an issue?

screenshot 2017-09-03 16 25 42
Vsevalot commented 6 years ago

If I understood datasheet right, epoc+ has resolution 14 bit, with LSB = 0.51μV, so to get voltage value you should subtract 4096 from your data and multiply result to 0.51μV

Epoc + datasheet: https://www.emotiv.com/files/Emotiv-EPOC-Product-Sheet-2014.pdf

ShaneHudson commented 6 years ago

Ah brilliant thank you!