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#Post#: 114--------------------------------------------------
Re: LDR APPLICATION
DIR By: Dioni
Date: August 15, 2016, 10:11 pm
---------------------------------------------------------
--- Quote from: jaylenebarias link ---
>
> Applications of LDRs
> There are many applications for Light Dependent Resistors.
These include:
>
> Lighting switch
> The most obvious application for an LDR is to automatically
turn on a light at a certain light level. An example of this
could be a street light or a garden light.
>
> Camera shutter control
> LDRs can be used to control the shutter speed on a camera. The
LDR would be used to measure the light intensity which then
adjusts the camera shutter speed to the appropriate level.
>
> Example - LDR controlled Transistor circuit
> LDR (Light Dependent Resistor) controlled transistor circuit
LDR controlled transistor circuit
> The simple way of constructing a circuit that turns on when it
goes dark. In this circuit the LDR and the other Resistor form a
simple 'Potential Divider' circuit, where the centre point of
the Potential Divider is fed to the Base of the NPN Transistor.
>
> When the light level decreases, the resistance of the LDR
increases. As this resistance increases in relation to the other
Resistor, which has a fixed resistance, it causes the voltage
dropped across the LDR to also increase. When this voltage is
large enough (0.7V for a typical NPN Transistor), it will cause
the Transistor to turn on.
>
> The value of the fixed resistor will depend on the LDR used,
the transistor used and the supply voltage.
>
> the materials available in LDR are:
>
> Dark Activated Colour Changing Night Light Kit
> When in darkness, this Easy Build Kit generates an array of
different coloured illuminations using a Colour Changing LED.
>
> Miniature LDR
> A miniature low cost LDR (non-RoHS) in a miniature epoxy
sealed open frame package (4mm dia.). Resistance reduces as
light falling on the device increases.
>
> Standard LDR
> An LDR (non-RoHS) light dependent resistor housed in a sealed
epoxy case with clear lens window. Resistance decreases as light
falling on the device increases.
>
--- End Quote ---
I'll just share one of my classmate on our MIcroP days created a
project about Camera shutter control. It uses LDR as a signal
for the start of the camera shutter.
#Post#: 115--------------------------------------------------
Re: LDR APPLICATION
DIR By: Dioni
Date: August 15, 2016, 10:13 pm
---------------------------------------------------------
--- Quote from: jeffrelyn V. Banar link ---
>
> yung project ko po which is Badminton with service I use LDR
once na makadetect na ng light yung ball ko na nag aact as LED
magpapass through the opponent. Bale yung LDR ko po nag aact as
my rocket on my project. :) :)
>
--- End Quote ---
If youre using LDR for the service make sure it is away from
environment light since LDR is sensitive to light.
#Post#: 116--------------------------------------------------
Re: LDR APPLICATION
DIR By: geneveokevin
Date: August 16, 2016, 1:31 am
---------------------------------------------------------
*Sunset to Sunrise Lighting Switching Project
*LDR Based light Intensity Control for Street Lights
#Post#: 117--------------------------------------------------
Re: LDR APPLICATION
DIR By: geneveokevin
Date: August 16, 2016, 1:36 am
---------------------------------------------------------
*LDR Pole Light Switch Circuit
JIM KEITH - 12/07/2012
*Light Activated Siren Circuit
JIM KEITH - 11/10/2012
*Light Activated Switch
SEBASTIAN KUSHERO - 07/31/2012
*Automatic Street Light Circuit
SRIHARI RAO - 07/09/2012
*LDR = Light Dependent Resistor = Photoresistor
P. MARIAN - 04/28/2011
*Light Alarm Circuit with LDR
P. MARIAN -
*LDR PC Desk Lamp
T.K. HAREENDRAN - 02/28/2011
*Christmas LED Lights Circuit
D MOHANKUMAR - 12/19/2010
*Automatic Lawn Light with LDR
T.K. HAREENDRAN - 12/14/2010
*Day Charger circuit
D MOHANKUMAR - 10/17/2010
*Light Operated Relay Circuit
D MOHANKUMAR - 10/03/2010
*Voltage Stabilizer Circuit with LDR (Photoresistor)
P. MARIAN - 08/31/2010
#Post#: 135--------------------------------------------------
Re: LDR APPLICATION
DIR By: Dioni
Date: August 17, 2016, 2:15 am
---------------------------------------------------------
--- Quote from: geneveokevin link ---
>
> *LDR Pole Light Switch Circuit
> JIM KEITH - 12/07/2012
>
> *Light Activated Siren Circuit
> JIM KEITH - 11/10/2012
>
> *Light Activated Switch
> SEBASTIAN KUSHERO - 07/31/2012
>
> *Automatic Street Light Circuit
> SRIHARI RAO - 07/09/2012
>
> *LDR = Light Dependent Resistor = Photoresistor
> P. MARIAN - 04/28/2011
>
> *Light Alarm Circuit with LDR
> P. MARIAN -
>
> *LDR PC Desk Lamp
> T.K. HAREENDRAN - 02/28/2011
>
> *Christmas LED Lights Circuit
> D MOHANKUMAR - 12/19/2010
>
> *Automatic Lawn Light with LDR
> T.K. HAREENDRAN - 12/14/2010
>
> *Day Charger circuit
> D MOHANKUMAR - 10/17/2010
>
> *Light Operated Relay Circuit
> D MOHANKUMAR - 10/03/2010
>
> *Voltage Stabilizer Circuit with LDR (Photoresistor)
> P. MARIAN - 08/31/2010
>
--- End Quote ---
Share this to your classmates so that they can get an idea on
what to do in their projects. :D :D
#Post#: 144--------------------------------------------------
Re: LDR APPLICATION
DIR By: cefresto
Date: August 17, 2016, 9:27 am
---------------------------------------------------------
--- Quote from: Dioni link ---
>
> [quote author=jaylenebarias link=topic=7.msg85#msg85
date=1471229437]
> Applications of LDRs
> There are many applications for Light Dependent Resistors.
These include:
>
> Lighting switch
> The most obvious application for an LDR is to automatically
turn on a light at a certain light level. An example of this
could be a street light or a garden light.
>
> Camera shutter control
> LDRs can be used to control the shutter speed on a camera. The
LDR would be used to measure the light intensity which then
adjusts the camera shutter speed to the appropriate level.
>
> Example - LDR controlled Transistor circuit
> LDR (Light Dependent Resistor) controlled transistor circuit
LDR controlled transistor circuit
> The simple way of constructing a circuit that turns on when it
goes dark. In this circuit the LDR and the other Resistor form a
simple 'Potential Divider' circuit, where the centre point of
the Potential Divider is fed to the Base of the NPN Transistor.
>
> When the light level decreases, the resistance of the LDR
increases. As this resistance increases in relation to the other
Resistor, which has a fixed resistance, it causes the voltage
dropped across the LDR to also increase. When this voltage is
large enough (0.7V for a typical NPN Transistor), it will cause
the Transistor to turn on.
>
> The value of the fixed resistor will depend on the LDR used,
the transistor used and the supply voltage.
>
> the materials available in LDR are:
>
> Dark Activated Colour Changing Night Light Kit
> When in darkness, this Easy Build Kit generates an array of
different coloured illuminations using a Colour Changing LED.
>
> Miniature LDR
> A miniature low cost LDR (non-RoHS) in a miniature epoxy
sealed open frame package (4mm dia.). Resistance reduces as
light falling on the device increases.
>
> Standard LDR
> An LDR (non-RoHS) light dependent resistor housed in a sealed
epoxy case with clear lens window. Resistance decreases as light
falling on the device increases.
>
--- End Quote ---
I'll just share one of my classmate on our MIcroP days created a
project about Camera shutter control. It uses LDR as a signal
for the start of the camera shutter.
[/quote]
Pano yun, Ma'am? I mean, pano po gumagana? :)
#Post#: 152--------------------------------------------------
Re: LDR APPLICATION
DIR By: geneveokevin
Date: August 21, 2016, 1:10 am
---------------------------------------------------------
eto ma'am yung link ng projects na ldr applications
HTML http://www.edgefxkits.com/blog/light-dependent-resistor-ldr-with-applications/<br
/>
#Post#: 156--------------------------------------------------
Re: LDR APPLICATION
DIR By: Dioni
Date: August 21, 2016, 11:41 pm
---------------------------------------------------------
--- Quote from: cefresto link ---
>
> [quote author=Dioni link=topic=7.msg114#msg114
date=1471317064]
> [quote author=jaylenebarias link=topic=7.msg85#msg85
date=1471229437]
> Applications of LDRs
> There are many applications for Light Dependent Resistors.
These include:
>
> Lighting switch
> The most obvious application for an LDR is to automatically
turn on a light at a certain light level. An example of this
could be a street light or a garden light.
>
> Camera shutter control
> LDRs can be used to control the shutter speed on a camera. The
LDR would be used to measure the light intensity which then
adjusts the camera shutter speed to the appropriate level.
>
> Example - LDR controlled Transistor circuit
> LDR (Light Dependent Resistor) controlled transistor circuit
LDR controlled transistor circuit
> The simple way of constructing a circuit that turns on when it
goes dark. In this circuit the LDR and the other Resistor form a
simple 'Potential Divider' circuit, where the centre point of
the Potential Divider is fed to the Base of the NPN Transistor.
>
> When the light level decreases, the resistance of the LDR
increases. As this resistance increases in relation to the other
Resistor, which has a fixed resistance, it causes the voltage
dropped across the LDR to also increase. When this voltage is
large enough (0.7V for a typical NPN Transistor), it will cause
the Transistor to turn on.
>
> The value of the fixed resistor will depend on the LDR used,
the transistor used and the supply voltage.
>
> the materials available in LDR are:
>
> Dark Activated Colour Changing Night Light Kit
> When in darkness, this Easy Build Kit generates an array of
different coloured illuminations using a Colour Changing LED.
>
> Miniature LDR
> A miniature low cost LDR (non-RoHS) in a miniature epoxy
sealed open frame package (4mm dia.). Resistance reduces as
light falling on the device increases.
>
> Standard LDR
> An LDR (non-RoHS) light dependent resistor housed in a sealed
epoxy case with clear lens window. Resistance decreases as light
falling on the device increases.
>
--- End Quote ---
I'll just share one of my classmate on our MIcroP days created a
project about Camera shutter control. It uses LDR as a signal
for the start of the camera shutter.
[/quote]
Pano yun, Ma'am? I mean, pano po gumagana? :)
[/quote]
When a laser light is pointed in the LDR the countdown for the
camera shutter will start. Anyway, I'll give you a circuit
connection of the LDR in the class after we finish our final
demo.
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