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

Project Byzantium ported to the Raspberry Pi!

Project Byzantium logoThe dev team for HacDC’s awesome, incubated Project Byzantium (PB) has ported their “ad-hoc mesh networking for the zombie apocalypse” platform to the Raspberry Pi. As the 1st milestone of their recent ISC grant award, they’ve started a parallel repository for ByzPi, their PB port for ARM, currently for Raspbian:

We opted to use Raspbian because it seems to be the more popular of the two [commonly installed Raspberry Pi Linux distributions]. Also, the packaging process for Debian was better understood than that for Arch Linux by the Project Byzantium team. We’re in a rapid development cycle so we wanted to hit the ground running and accomplish as much as possible in the available time before the first milestone.

Congratulations to The Doctor, Ben the Pyrate, and haxwithaxe!

Soldering 0603

what I see through the beauty of 2x *sigh*

what I see through the beauty of 2x *sigh*

This weekend has been full of rocking out the surface-mount soldering for my current project – Building the Proxmark3. Figured I would upload some pictures on Flickr here

The only magnification I’ve had during this is my 2x radio-shack bought magnifying glass, needless to say I’m looking for a nice scope now. Thanks to Virosa and Ellen for the help with this project, should have one ready to play with soon. Will give a talk at the space when it’s working and get some usage under my belt.