Active Electrode Building Guide. [Up to my homepage] IMPORTANT NOTE: Please do not contact me about the active electrodes.
You will get more help if you send an email to the OpenEEG mailing list. Also, check out Olimex if you're interested in buying a preassembled active electrode. This guide should help you to build Active Electrodes for the modularEEG, as proposed by Jarek Foltynsky here. The active electrodes described here correspond to the modified circuit diagram suggested by Joerg Hansmann: This guide proposes a tradeoff between building simplicity and signal quality. Please be warned that making AEs is not a simple task. In a previous design, I tried a rectangular pin array, but I didn't work. MindFlex xbee eeg hack. Heyo guys, this is my last ultimate hack for the mindflex. I wanted to reproduced the results of the mindflex as indicated by the manufacturer.The simplest test that can be done with an EEG device is to check if the alpha waves go up significantly when closing your eyes.
Mindflex hack. Arturo Vidich, Sofy Yuditskaya, and I needed a way to read brains for our Mental Block project last fall.
After looking at the options, we decided that hacking a toy EEG would be the cheapest / fastest way to get the data we wanted. Thinking Cap. Mindmachine. Solson EEG. Around 1967 a fellow named Maurice "Barry" Sterman discovered that cats could be trained to alter their brain waves, and that these same cats were less susceptible to having seizures when injected with monomethylhydrazine (rocket fuel); hence the start of some very interesting research into neurofeedback.
I was told of two books on the subject, which I have purchased, read, and would recommend: A Symphony in the Brain, by Jim Robbins, and Getting Rid of Ritalin, by Robert Hill and Eduardo Castro. I have purchased and would NOT recommend ADD The 20-Hour Solution by Steinberg and Othmer. Only click this if you want to hear me rant. Besides the above mentioned books, and general Googling, I've have learned the most about measuring brain waves (EEG signals) from The OpenEEG Project.
They have posted schematics for a few different DIY EEG designs, and even arranged for a company to sell you assembled circuit boards for about $200. Here are some links to stuff that I have learned from. Biosemi. OCZ Neural Impulse Actuator. EEG/EKG Schematics by +1+1+1. EEG & EKG (ECG) Schematics last updated 7-Jan 2005 I developed my 4-channel, dual-purpose EEG/ECG box between September 2003 and March or April of 2004 with the gracious help of David Rosenboom at Calarts for use in my medi[t]ations sound performance series.
We combined schematics from his book Biofeedback and the Arts (available thru Frog Peak Press) with schematics from the article "Computers On The Brain" by Steve Ciarcia (in the June 1998 issue of BYTE magazine). We are also indebted to Ronald Kuivila who was instrumental in unlocking the mystery of how to get the low-frequency audio signal into my computer and subsequently into SuperCollider... WARNING: USE AT YOUR OWN RISK. This work is licensed under a Creative Commons License. Okay, here are the schematics: pdf | postscript file | parts list (coming soon) And here are some potentially helpful links to cheap electrodes, electronics parts, resources, etc. OLIMEX. ModularEEG. General information The ModularEEG device is made up of two or more EEG amplifiers, and a 6-channel signal capture board that connects to a PC via a standard serial cable.
The standard setup has two EEG channels. As with any EEG device that you build yourself, there is a risk of injury involved. Make sure you read the WARNING file below. Brainclinics. J&J Engineering. QDS System. BioExplorer Software BioExplorer is a Windows program for real-time biophysical data acquisition, processing, and display.
It is intended for personal use in entertainment, education, and experimentation. BioExplorer version 1.3 is now available for download this version is needs the Hasp Key. The 30 days Demo Trial Version download link is listed below. Download BioExplorer demo: time limited trial version. www.cyberevolution.com System Requirements Windows 98, ME, 2000, or XP. You can get the latest version of DirectX here. MonolithEEG_e. OpenEXG. Last Updated: 21 April 2009 A 2-channel biometric signal amplifier for EEG and other biological signal processing.
About the project ModularEEG has been around for some years. The car industry has progressed by about 1 and ½ car model generations during this period, technology moves on. ModularEEG is a well performing device and should still be the design of choice for beginners. Disadvantages of ModularEEG are the following: In today's RS232-less world, needing to fiddle with RS232-USB converters is clumsy;Having to use a wall-wart mains adapter is also a pain;The 10-bit resolution, although adequate, is on the low side.
Pceeg. ScEEG. Sound Card EEG (ScEEG) Technology This web site is focused on sound card EEG hardware and software experimentation to create a Brain-to-Computer Interface (BCI).
Several types of EEG units have been built to date, a dual channel AM unit, a dual channel FM unit, A four channel AM unit, and a four channel multiplexed unit. The FM unit uses approximately 4.5 kHz of audio spectrum per channel while the AM unit uses approximately 2 kHz of spectrum (with some guard band allocation) per channel. The first attempt in building a prototype sound card EEG unit was begun in July 2005 .
The first unit consisted of a two channel AM modulated version with a built-in power supply. The second prototype was a single channel AM unit that reduced the modulation circuitry and the size of the unit was reduced to 2" by 4".