The amplifier mount uses magnets with a sturdy click to a counter piece attached to the cap, i.e., not with velcro which gets worse over time. This is with all the leads attached to the electrodes and with the amplifier mounted at the back of the head. Note that the electrodes have a hole in the center: it is possible to combine them with electrode gel to improve the electrode-skin contact, or to bridge the hair in case the electrode does not have sturdy contact with the skin.īelow it is shown with the electrodes oriented the right way, i.e., inwards. This allows the pins to be wiggled through the hair and touch the scalp. The electrodes are quite high and stick out 17 mm from the cap. The photo below shows the cap mounted inside-out on a styrofoam head with the electrodes pointing outward. It comes with a short “getting started” information brochure, and there are online video tutorials. The LEDs can be controlled by the software, but are not used by default and I don’t really see any practical use for them besides implementing some silly neurofeedback system that allows someone sitting next to you to see how much “brain power” you have 🤷 ?! On the right side of the amplifier there is something that looks like a microphone boom of a headset, it extends over the right ear and has 8 LEDs. Besides the 8 leads for the dry electrodes, the amplifier has two leads with standard snap electrodes and comes with Kendall H124SG stick-on electrodes for the reference and ground behind the left and right ear.īesides the 8 EEG channels, the amplifier includes a IMU sensor with three accelerometer and three gyroscope channels these are sampled and transmitted at the same 250 Hz rate as the EEG.
The amplifier has one button and a RGB status led. The wireless amplifier is about 63x45x17 mm large and has magnets that hold it firmly in place at the back of the cap. The leads from the amplifier click on the electrodes with a custom U-shaped PCB design. Here are closeups of the electrode and the clip. The electrodes seem to be injection molded and have the Gtec logo on them. The electrodes are made of a ductile conductive polymer that feels a bit rubbery.
Ladiocast blackhole Bluetooth#
The Bluetooth dongle was not needed to get it working, it also works fine with the built-in Bluetooth of the Lenovo Yoga and Lenovo Thinkpad laptops that I tested it with. It arrived in a nicely designed and environmentally friendly cardboard packaging, including dry electrodes, a pack of 50 stick-on electrodes for the reference and ground, a medium-sized cap, an USB Bluetooth dongle and a micro-USB cable for charging.
I have worked with Gtec systems at a number of BCI2000 workshops, and we used the Gtec Nautilus for the Cogito in Space project (see also here) Given this background, I had high expectations for this new system and the Unicorn does not disappoint.
Ladiocast blackhole series#
Gtec has been developing research-quality EEG systems for Brain-Computer Interfaces for a long time, and in recent years have been organizing a series of BR41N.IO hackathons that target hackers/makers and creative applications. The Unicorn is a low-cost 8-channel wireless head-mounted EEG device developed by Gtec and first released in 2019. Together with colleagues from the Donders Institute, the Baby and Child research center and the Body Brain Digital Musical Instrument project we are going to explore this system, both for non-intrusive EEG measurements in young children and for EEG biofeedback for creative musical applications.
I am exited to report on the Unicorn Hybrid Black EEG headset that I received a few weeks ago and that I have now been able to explore.
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