Peripherals/Sensors

There are a large variety of sensors which can be added to the XO using the MIC_IN port. These may include;

• Touch/Pressure - Extended information
• Light - Use it for inverse square law experiments or for studying polarizers, reflectivity, or solar energy.
• Temperature
• Humidity
• Barometer - Can be used for either weather studies or for lab experiments involving pressures close to normal atmospheric pressure
• Soil Moisture Sensor - Some soil moisture sensors use capacitance to measure the water content of soil
• Hall Effect (magnetic field) sensors - By using a rotating sensor tip it is possible to measure both transverse and longitudinal magnetic fields.
• Oscilloscope - With amplification?
• Ultrasonic - Water level monitoring, create real-time motion graphs position, velocity and acceleration.
• Light Gate
• Water Purity Monitor
• Metal Detector
• Accelerometer - This is great for studying collisions or any motion with larger accelerations.
• Charge Sensor - the Charge Sensor can make quantitative measurements. Numerical measurements improve many electrostatics experiments such as charging by induction, charging by friction, and charging by contact.
• CO2 or O2 Gas Sensor - These probes could measure changes in CO2 levels during plant photosynthesis and respiration. You could monitor changes in CO2 levels occurring in respiration of organisms from crickets to humans
• Conductivity Probe
• pH Sensor
• [http://wiki.laptop.org/go/Peripherals/Sensors/
• Salinity Sensor - Measures the total-dissolved salt content in water.

External Links

• USB Sensor Interface Schematic
• Sensor Options