Light Dependent Resistor (LDR) - Revision history

DT Online: Added link

2016-11-02T11:11:13Z

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	LDRs are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.		[http://en.wikipedia.org/wiki/Photoresistor '''LDRs'''] are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.


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	An '''LDR''' decreases its resistance with an increase in light intensity. As light increases, therefore, the resistance of the '''LDR''' decreases and allows the voltage at the base of the transistor to move closer to that of the positive supply rail.		An [http://en.wikipedia.org/wiki/Photoresistor '''LDR'''] decreases its resistance with an increase in light intensity. As light increases, therefore, the resistance of the [http://en.wikipedia.org/wiki/Photoresistor '''LDR'''] decreases and allows the voltage at the base of the transistor to move closer to that of the positive supply rail.


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	An '''LDR''' decreases its resistance with an increase in light intensity. In this position therefore, as light decreases the resistance of the '''LDR''' increases and allows the voltage at the base of the transistor to move closer to that of the positive supply rail.		An [http://en.wikipedia.org/wiki/Photoresistor '''LDR'''] decreases its resistance with an increase in light intensity. In this position therefore, as light decreases the resistance of the [http://en.wikipedia.org/wiki/Photoresistor '''LDR'''] increases and allows the voltage at the base of the transistor to move closer to that of the positive supply rail.

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DT Online: Added applications

2016-11-02T10:48:18Z

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 A typical example is the ORP 12 type which will vary its resistance from about 2 Megohms in the dark to 100 ohms in normal room lighting.
 LDRs are frequently used as sensors in light activated '''[[Switches|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.
 {{Resistors/Capacitors/Diodes Buyers Guide}}

DT Online: Added Template

2016-07-03T13:11:33Z

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	[[File:ORP12 LDR.jpg\|300px\|right]]		[[File:ORP12 LDR.jpg\|300px\|right]]
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			=====Description=====

	The resistance of [http://en.wikipedia.org/wiki/Photoresistor '''Light Dependent Resistors ''(LDR)'''''] decreases when light falls on them.		The resistance of [http://en.wikipedia.org/wiki/Photoresistor '''Light Dependent Resistors ''(LDR)'''''] decreases when light falls on them.


			=====Features and Applications=====

	A typical example is the ORP 12 type which will vary its resistance from about 2 Megohms in the dark to 100 ohms in normal room lighting.		A typical example is the ORP 12 type which will vary its resistance from about 2 Megohms in the dark to 100 ohms in normal room lighting.

	LDRs are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.		LDRs are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.


			{{Resistors/Capacitors/Diodes Buyers Guide}}


	[[Category:Secondary]]		[[Category:Secondary]]
	[[Category:Electronics Components]]		[[Category:Electronics Components]]

DT Online at 08:17, 3 June 2015

2015-06-03T08:17:54Z

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	[[Category:Secondary]]		[[Category:Secondary]]
	[[Category:Electronics ~~and Control]]~~		[[Category:Electronics Components]]
	~~[[Category:Materials and~~ Components]]

DT Online: Corrected category link

2015-04-30T21:28:34Z

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	[[Category:Secondary]]		[[Category:Secondary]]
	~~[[Category:Components]]~~
	[[Category:Electronics and Control]]		[[Category:Electronics and Control]]
			[[Category:Materials and Components]]

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2015-04-28T15:16:46Z

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	{{Secondary Electronics}}		[[Category:Secondary]]
			[[Category:Components]]
			[[Category:Electronics and Control]]

DT Online: Added Template

2014-11-16T12:44:39Z

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	LDRs are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.		LDRs are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.
	~~[[Category:~~Electronics]]

			{{Secondary Electronics}}

DT Online: Added category link

2014-11-13T16:32:38Z

Added category link

← Older revision		Revision as of 16:32, 13 November 2014
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	LDRs are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.		LDRs are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.
			[[Category:Electronics]]

DT Online: Corrected link

2014-11-13T14:57:05Z

Corrected link

← Older revision		Revision as of 14:57, 13 November 2014
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	A typical example is the ORP 12 type which will vary its resistance from about 2 Megohms in the dark to 100 ohms in normal room lighting.		A typical example is the ORP 12 type which will vary its resistance from about 2 Megohms in the dark to 100 ohms in normal room lighting.

	LDRs are frequently used as sensors in light activated '''[[~~Switch~~\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.		LDRs are frequently used as sensors in light activated '''[[Switches\|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.

DT Online: Light Dependent Resistor (LDR)

2014-11-12T17:13:59Z

Light Dependent Resistor (LDR)

New page

[[File:ORP12 LDR.jpg|300px|right]]
The resistance of [http://en.wikipedia.org/wiki/Photoresistor '''Light Dependent Resistors ''(LDR)'''''] decreases when light falls on them.

A typical example is the ORP 12 type which will vary its resistance from about 2 Megohms in the dark to 100 ohms in normal room lighting.

LDRs are frequently used as sensors in light activated '''[[Switch|switch]]''' circuits, for example, to switch on lights in the evening when it starts to get dark.