Biosignal Amplifier Ready for Plug-and-Play

Mirage335 Biosignal Amp Host Schematic (detail)HacDC’s biohacking group has developed a new, ultra-low-noise biosignal amplifier and released it under the GPLv3.

The Mirage335 Biosignal Amp makes brainwave (EEG), heart (ECG), and muscle (EMG) detection all possible without reconfiguration.

Mirage335 Biosignal Amplifier Setup

Lead designer, mirage335, writes:

This system is geared for maximum performance close to theoretical limits. Ideally, the lower noise floor allows us to confirm the presence or absence of weak biosignals, especially electroencephalography signals, when they become difficult to detect with other systems.

Analog (direct-to-scope) and USB (direct-to-computer) outputs are provided. USB functionality is provided by an Arduino compatible ATMega32U4 and LTC2440 24-bit Analog-to-Digital converter.

EEG and ECG (Wikimedia Commons)

    Other features:

  • USA companies provide all parts, including circuit boards
  • Safety oriented architecture. Multiple isolation barrier and surge suppressor layers.
  • Active electrodes, wet and dry designs.
  • Extreme common-mode rejection measures.
  • Lowest noise amplifiers, based on new thermal noise research.
  • Future proof. Modular SATA data cable architecture provides smooth upgrade paths.
  • Isolation amplifier. Safe, high-resolution analog output for lab equipment (eg. oscilloscopes), sound cards, microcontrollers, and ADCs.
  • USB support, based on ArduinoDAQ (ATMega32U4 + LTC2440).
  • Efficient, high-order IIR biquad filters notch out 60Hz, 30Hz and high-frequency noise, right at the embedded microcontroller.
  • Wide supply voltage support. +/-6V to +/-15V
  • Resistor programmable gain. 13000x default.

Mirage335′s effort was supported by these members of our biohacker group, contributing to the design, testing, and funding of this versatile device:

  • Shawn Nock
  • Sharad Satsangi
  • Stuart Washington
  • The Real Plato
  • Logan Scheel

Usage instructions are available on the wiki.

Complete schematics, PCBs, BOMs, 3D printable enclosures, firmware, USB driver software, and documentation hosted on Github:

Additional documentation is available on the project’s webpage.

Join the HacDC biohacking community’s mailing list: https://groups.google.com/a/hacdc.org/forum/#!forum/meat

Video from Lightning Talks VII

HacDC held a seventh round of lightning talks in November. If you missed these talks or you’d like to relive the experience, please enjoy this video footage of the event:

These links will take you directly to the indicated lightning talk:

Support HacDC When You Order From Amazon

Support HacDC when you buy from Amazon.com By using our Amazon Affiliate link (especially during the impending synchronized gifting season) you can contribute to HacDC every time you order from Amazon.com. This will set a cookie that will persist for 24 hours or until you use another organization’s affiliate link.

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The 2nd Annual HacDC CryptoParty is Nov 16

cryptoparty

Date: 16 Nov 2013
Time: 4 – 10pm
Place: 1525 Newton St NW
Washington DC 20010
(16th St entrance)

Subscribe to HacDC’s CryptoParty list for more interactive info and updates.

The HacDC CryptoParty will cover topics aimed at helping you keep your data safe by learning how to use basic cryptography tools to protect the content of your data and — of particular interest because of recent revelations— to thwart common forms of surveillance.

Like most of us, your life is probably pretty normal and of course you have nothing to hide. You may even think that allowing the government to read citizens’ email is the price we all have to pay for security.

But what if increased surveillance actually doesn’t keep us safer? What if the mere specter of surveillance suppresses your free expression? And what if you do have something that you want to keep private — for instance your sexual orientation, health status, political views, or that you’ve decided to stop practicing your religion?

Freedom of expression is the matrix, the indispensable condition, of nearly every other form of freedom. —Justice Benjamin N. Cardozo

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