Photoresistor Light Sensitive 20mm LDR Sensor
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Category: Others Sensors
SKU: 1708
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(13 customer reviews)
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1) Diameter: 20 mm.
2) No. of pins: 2.
3) Type of mounting: PCB through-hole.
4) Size: 20mm.
5) Max. voltage: 500 VDC.
6) Max. power: 500 mW.
Description:
LDR (Light Dependent Resistor) is a resistor whose resistance varies inversely with the amount of light falling on it. It is also known as photo resistor, photocell, photo conductive cell etc. LDR are available in 5mm, 8mm, 12mm and 25mm dimensions. LDR is made of high resistance semiconductor material. Semiconductor material used for the photo resistors is cadmium sulphide, CdS. When it’s dark, LDR has high resistance known as dark resistance. Usually dark resistance will be in the range of mega ohms. When light falls on LDR, resistance reduce to kilo ohms range.
Analog Applications:
Camera exposure control
Auto slide focus – dual cell
Photocopy machines – the density of the toner
Colorimetric test equipment
Densitometer
Electronics scales – dual cell
Automatic gain control – modulated light source
Automated rear view mirror
Digital Applications:
Automatic headlight dimmer
Nightlight control
Oil burner flame out
Streetlight control
Absence/presence (beam breaker)
Position sensor
Other applications:
Annunciator
Camera automatic photometry
Electronic toy
Industrial control
Light control
Light control lamp
Photoelectric control
Switch
Features:
Coated with epoxy
Good reliability
High sensitivity
Small volume
Fast response
Good spectrum characteristic
Size: 20mm
Max. voltage: 500 VDC
Max. power: 500 mW
Spectrum Peak Value (nm): 560
Light resistance ( KΩ) : 10–20 kΩ
Dark resistance ( KΩ): 2 kΩ.
Υ value : 0.6.
Increase response time: 30 mS.
Decrease response time: 30 mS.
Package Includes:
1 x Photoresistor Light Sensitive 20mm LDR Sensor.
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