Light,IR & Radiation
IR Infrared Remote
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Ultra-thin IR Infrared Remote Controller For Arduino  Intelligent Car SCM Learning Board Remote Control  
 
 
Specifications:
CR2025 environmental protection button batteries required.
Working Distance: more than 8 m ( effected by the surrounding environment, the receiver sensitivity etc )
Effective Angle: 60 degrees
 Surface materials: 0.125 mmPET stick, With effective life : 20000 times.
 Stable quality, cost-effective
Static current 3-5 uA, dynamic current 3-5 mA

Package Included:
1 X remote controller

5mm Infrared Transmitting IR LED 940nm
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Description:
Size: 5mm
Lens Color : Water Clear
Forward Voltage (V) : 1.5~1.6
Forward Current (mA): 60mA Continuous, 120mA peak for 10% pulse width
Wavelength (nm): 940
View Angle: 15-30 degree 

Package Included:
1 X Infrared  Transmitting Tube

SparkFun Ultraviolet UV Sensor Breakout - ML8511
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Description: The ML8511 breakout is an easy to use ultraviolet light sensor. The MP8511 UV (ultraviolet) Sensor works by outputing an analog signal in relation to the amount of UV light that’s detected. This breakout can be very handy in creating devices that warn the user of sunburn or detect the UV index as it relates to weather conditions...more detail given below

Description: The ML8511 breakout is an easy to use ultraviolet light sensor. The MP8511 UV (ultraviolet) Sensor works by outputing an analog signal in relation to the amount of UV light that’s detected. This breakout can be very handy in creating devices that warn the user of sunburn or detect the UV index as it relates to weather conditions.

This sensor detects 280-390nm light most effectively. This is categorized as part of the UVB (burning rays) spectrum and most of the UVA (tanning rays) spectrum. It outputs a analog voltage that is linearly related to the measured UV intensity (mW/cm2). If your microcontroller can do an analog to digital signal conversion then you can detect the level of UV!

Documents:

Source: Sparkfun

3 way Line Following Tracking Sensor Module Hunt Sensors module
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Description:
This infrared sensor trio detector and trio output
Build-in TCRT5000 sensor
Work Power : 5VDC
Detector distance:10MM
Applicable to a variety of platforms including Arduino/AVR/ARM/PIC

Package Included:
1 X 3-way Tracking Sensor

2 Channel Optical Encoder Speed Sensor Module For 2WD Smart Car (Tachometer)
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Description: 

Slot Type on the radio using optical, non-transparent objects can be triggered by Slot Type, output 5V TTL level. Schmitt trigger pulse to shake, can be used to measure car speed, distance measurement applications!
Four pin defined as +5 GND OUT1 OUT2,  OUT1 OUT2 is level output! Direct access to the microcontroller IO port, each way with a LED indicating the output status

Package Included:

1 X 2WD Speed Module

5mm Infrared IR Transmitter and Receiver LED 940nm
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Description:
Infrared Receiver Tube:
Diameter : 5MM
wavelength:940nm
Forward Voltage: 1.2-1.3V

Infrared  Transmitting Tube:
Size: 5mm
Lens Color : Water Clear
Forward Voltage (V) : 1.5~1.6
Forward Current (mA): 60mA Continuous, 120mA peak for 10% pulse width
Wavelength (nm): 940
View Angle: 15-30 degree 

Package Included:

1 X Infrared Receiver Tube
1 X Infrared  Transmitting Tube

IR Infrared Motion Sensor Automatic Light Lamp Switch 250V PIR
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Color: White
- ABS material
- Automatic IR motion sensor switch
- Automatic turn on/off while detected people come or left
- Detecting Range: 140 degree cone angle (within 7 meters)
- Voltage: AC 110~250V (50~60Hz)
- Working temperature: -20~+50'C
- Static power: Less than 0.06W
- Resistive load Power: 200W
- Inductive load power: Less than 60W
- Working illumination: 120Lux ± 20%
- Time Delay: 16s ± 20%
- Comes with 2 mounting screws

TCRT5000 Reflective Optical Sensor IR
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Features
Snap-in construction for PCB mounting
Package height : 7mm
Plastic polycarbonate housing construction which prevents crosstalk
L = long leads
Current Tranfer Ratio (CTR) of typical 10%

Application
Psition sensor for shaft encoder
Detection of reflective material such as paper, IBM cards, magnetic tapes etc.
Limit switch for mechanical motions in VCR
General purpose - wherever the space is limited