FlexVolt Bluetooth

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Technical Specifications:

  • Measurement Channels: 2/4/8
  • Power:
    • 3.7V Li-Ion Battery
    • Life ~ 10 hours
  • Data Transfer:
    • Bluetooth 2.0 EDR (Enhanced Data Rate)
    • Range: > 25 ft (7.5 m)
  • Sampling rate: Configurable up to 2kHz
  • Sensor Gain:  1845
  • Signal Measurement: Analog inputs on PIC16F1455/9
  • Detector bitdepth: 10 bits accessible in settings.  8 bits by default.
  • Dynamic Range:  +/- 1 mV  ( (System Voltage/2)/Gain)
    • Dividing by 2 because the system voltage is split for +/- signals
  • Theoretical Max Resolution:
    • 10 bits: ~ 2uV (Dynamic Range / 512 bits)
    • 8 bits:  ~ 8uV (Dynamic Range / 128 bits)
    • Note: Approximate because it varies with battery voltage.
    • Note: Realistically, the bottom two bits of ADCs (analog-to-digital converters) are electrical noise, dropping resolution by a factor of 4.
  • Package:
    • ABS Enclosure
    • Mini USB port for battery charging
    • Slide switch to select charge mode or measurement mode
  • Additional Features:
    • Plug-in detection:  Most models will detect plug-in, at least on channels 1-4

FlexVolt Hacker (Arduino Shield)

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technical specifications:

  • Measurement Channels:  2/4  (stack 2-ch + 4-ch for 6 channels!)
  • System Voltage: Arduino 5V
  • Data Transfer:
    • Serial over USB  (default)
    • Any Arduino available method such as a Bluetooth shield or adapter
  • Sampling Rate: Configurable up to 2kHz
  • Sensor Gain:  1845
  • Signal Measurement: Arduino analog inputs
    • 4 Channel Pins: Analog 0-3, Digital 2-5
    • 2 Channel Pins: Analog 4-5, Digital 6-7
  • Detector bitdepth: 10 bits accessible in settings.  8 bits by default.
  • Dynamic Range:  +/- 1.355 mV  ( (System Voltage/2)/Gain)
    • Dividing by 2 because the system voltage is split for +/- signals
  • Theoretical Max Resolution:
    • 10 bits: ~ 2.65uV (Dynamic Range / 512 bits)
    • 8 bits:  ~ 10.6uV (Dynamic Range / 128 bits)
    • Note: Approximate because it varies with battery voltage.
    • Note: Realistically, the bottom two bits of ADCs (analog-to-digital converters) are electrical noise, dropping resolution by a factor of 4.
  • Package: Stackable Arduino shield
    • Compatibility: Uno, Mega
  • Additional Features:
    • Plug-in detection:  Detects when channels are plugged in/removed.

 

EMG/EKG Electrodes

  • FlexVolt has a working relationship with a local medical electrode company to provide starter packs and re-supply packs for when you run low.
  • The majority of the electrodes out there are wet-gel, adhesive tape. We think the dry-gel electrodes are superior, so we also offer a dry-gel electrode option.
  • Nearly all electrodes are standardized, so your FlexVolt will work with almost any electrode pack you get from us or anywhere else!

 

Original FlexVolt Armband Wearable EMG Prototype:

This was the concept design for a wearable sensor. This version looks huge and ugly because it used breadboards instead of printed circuit boards.  We’ve come so far since the beginning!

  • Indicator lights for effort visualization
  • Adjustable Armband
  • (it’s an old iPod exercise armband)
  • We are developing FlexVolt phone apps that would enable you to take measurements on the go and store them or monitor them on your phone.

 

 

 

Comments, Questions, or Suggestions?  Tell us what you think!  info@flexvoltbiosensor.com