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Planned devices for the XO.

Devices will be connected to special unit powered by SiLabs programmable CPU.

Here are some ideas for possible devices:

  • Thermometer
  • Voltmeter, ampermeter, ohmmeter
  • Oscilloscope
  • Photodiode
  • PH meter
  • TeleHealth Module
    See also the Digital Signal Processing page for work being done in India

Processor unit

processor type: C8051F321 - Full Speed USB, 16k ISP FLASH MCU Family - ETC CPU specification
cpu size: 6mm x 6mm
board size: 15mm x 30mm
case size: 20mm x 40mm (size similar to USB Bluetooth adapter )

Electrical scheme

Calculated price: CPU unit: cca 3$
board + additional electronic parts: 17$
connectors: 2$

Total price: 25$ (retail price)


Sensors will be connected to the CPU unit. The CPU unit will measure values from the sensors and feed them into application on the XO. (CPU can use every sensor that can convert measurement into voltage or current)

Planned sensors:

  • Thermometer (cca 2$)
  • Voltmeter, ampermeter, ohmmeter, oscilloscope (cca 1$)
  • Photodiode (cca 2$)
  • PH meter

(if you find cheap sensors please add them into this list)

All existing sensors

Technical details

  • Accelerometers
    • Low-g Accelerometer
    • 25-g Accelerometer
    • 3-Axis Accelerometer
  • Barometer
  • Blood Pressure Sensor
  • Charge Sensor
  • CO2 Gas Sensor NEW DESIGN
  • Colorimeter
  • Conductivity Probe
  • Current Probe
  • Differential Voltage Probe
  • Digital Control Unit
  • Dissolved Oxygen Probe
  • Drop Counter
  • Dual-Range Force Sensor
  • EKG Sensor
  • Electrode Amplifier
  • Flow Rate Sensor
  • Force Plate
  • Gas Pressure Sensor
  • Garmin® eTrex Venture
  • Garmin® eTrex Vista Cx NEW
  • Hand Dynamometer
  • Hand-Grip Heart Rate Monitor
  • Instrumentation Amplifier
  • Ion-Selective Electrodes
    • Calcium ISE
    • Chloride ISE
    • Ammonium ISE
    • Nitrate ISE
  • Light Sensor
  • Logitech QuickCam Pro 5000
  • Magnetic Field Sensor
  • Microphone
  • Motion Detectors
    • Go! Motion
    • Motion Detector
    • CBR 2
  • O2 Gas Sensor NEW DESIGN
  • Ohaus Balances
  • ORP Sensor
  • pH Sensor
  • Photogate
  • Radiation Monitors
    • Radiation Monitor
    • Student Radiation Monitor
  • Relative Humidity Sensor
  • Respiration Monitor Belt
  • Rotary Motion Sensor
  • Salinity Sensor
  • Sound Level Meter NEW DESIGN
  • Soil Moisture Sensor
  • Spectrometers
  • Spirometer
  • Temperature Probes
    • Stainless Steel Temperature Probe
    • Go!Temp (computers only)
    • EasyTemp (calculators only)
    • Infrared Thermometer NEW
    • Surface Temperature Sensor
    • Extra-Long Temperature Probe
    • Direct-Connect Temperature Probe
  • Thermocouple
  • Turbidity Sensor
  • UV Sensors
  • Voltage Probe
  • Wireless Dynamics Sensor System

(please submit more ideas here)

Questions about this hardware

(please submit all your questions here so we can answer them - your feedback is VERY important)

Inner links