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RadioShack® 5mm Ambient Light Sensor (5-Pack)

Model:

2760326

 | Catalog #: 276-326
Sale Price:
$3.59
You save:
$0.40 (10%)
 
Valid until: 10/28/14
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Product Summary

Sense the light.

Detect ambient light to control electronic devices with these Ambient Light Sensors from RadioShack. They're ideal for DIY projects.

  • Light to current, analog output
  • Good output linearity across wide illumination range
  • Operation temperature performance: -30°C to 85°C
  • 3V to 24V supply voltage range
  • Lower dark current: 0.1uA
  • RoHS compliant and Pb-Free package
Pricing and availability: Please note that all prices are subject to change without prior notice. Prices advertised on this site are for online orders only. Prices on some items may differ from those advertised in RadioShack stores. All merchandise may not be available at all stores, and all stores may not participate in all sales promotions. We recommend you contact the store to confirm product availability and price.

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By phone: 1-800-843-7422

Manufacturer Warranty

  • Parts: 90 days
  • Labor: 90 days
Tech Specs

Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews
RadioShack® 5mm Ambient Light Sensor (5-Pack)
 
3.7

(based on 6 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (2)

  • 3 Stars

     

    (3)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

    Cons

      Best Uses

          • Reviewer Profile:
          • Enthusiast (3)
          • Primary use:
          • Personal (6)
          • Was this a gift?:
          • No (6)

        Reviewed by 6 customers

        Sort by

        Displaying reviews 1-6

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        4.0

        PDT243 link

        By Jim 88

        from San Diego, CA

        About Me Enthusiast

        Verified Reviewer

        Pros

          Cons

            Best Uses

              Comments about RadioShack® 5mm Ambient Light Sensor (5-Pack):

              Data sheet url moved to http://www.everlight.com/SeriationProduct.aspx?Seq=88b5f930-2605-e411-8b3b-0002a54e500f
              Or search on everlight.com for "PDT243".

              • Primary use:
              • Personal
              • Was this a gift?:
              • No

              (1 of 1 customers found this review helpful)

               
              4.0

              Good Enough Stuff

              By RiGonz

              from Spain

              About Me Enthusiast

              Verified Reviewer

              Pros

              • Consistent
              • Sensitive

              Cons

                Best Uses

                • Luxometer

                Comments about RadioShack® 5mm Ambient Light Sensor (5-Pack):

                The device seems to be Everlight ALS-PDT243-3C/L451, as mentioned by ScienceGeyser.
                Nevertheless, the Voltage Output vs Illuminance chart of the datasheet seems to me a bit odd (0-20 lux...).
                I am using it as a luxometer in an Arduino, fed at 5 V with a 100 ohm resistor, and it is quite linear from 0 to 1000 lux (I have calibrated with a hand-held light meter).

                • Primary use:
                • Personal
                • Was this a gift?:
                • No

                (5 of 5 customers found this review helpful)

                 
                5.0

                Excellent Ambient Light Sensor

                By ScienceGeyser

                from Nashville, TN

                About Me Power User

                Verified Reviewer

                Pros

                • Consistent Performance
                • Replaces Cds Sensor

                Cons

                  Best Uses

                  • Ambient Light Sensing

                  Comments about RadioShack® 5mm Ambient Light Sensor (5-Pack):

                  This device is designed to replace CdS cells in RoHS compliant devices. This is not intended to be used as a high-speed sensor for use in beam break sensors or light communication devices. In fact, if you put this device under a lamp that is flashing at 120Hz (most lights in your house), you will see that the signal is relatively flat compared to the signal you'll get from standard phototransistors or light-to-voltage converters. This is actually a requirement for some uses since lights driven by line voltage often flicker at 120Hz and this could confuse devices that are looking for a steady signal.

                  I believe that this device is the Everlight ALS-PDT243-3C/L451 and you can find the datasheet here - http://www.everlight.com/datasheets/ALS-PDT243-3C-L451_V1_datasheet.pdf

                  Sadly, the datasheet does not give any rise time or fall time specs but I did a few measurements and it looks like it has a rise time of about 50V/mS @ 3V Vcc and a fall time of about 0.4V/mS @ 3V Vcc.

                  Photos below show a comparison of the RadioShack Ambient Light Sensor to the TSL257 Light-to-Voltage Converter.

                  The bottom line is that this device works very well for most ambient light measurement applications where the need for line frequency filtering is undesirable (space constraints like small robots) and fast response is not necessary (faster than ~10mS).

                  • Primary use:
                  • Personal
                  • Was this a gift?:
                  • No
                   
                  3.0

                  Good enough for government work...

                  By Guvvy

                  from Pacific Northwest

                  About Me Enthusiast

                  Verified Reviewer

                  Pros

                  • Consistent Performance
                  • Versatile

                  Cons

                    Best Uses

                    • EDUCATIONAL
                    • Hobby Analogue Robots
                    • Light Sensing Automation
                    • Power Conservation

                    Comments about RadioShack® 5mm Ambient Light Sensor (5-Pack):

                    As has been said before the device is rather sensitive and that is exactly what one ought to desire from a light sensing device. In order to control Lux sensitivity appropriate light insulation and resistor values need to be selected (or experimented).

                    I am using these to drive current to a pair of small DC motors to "chase" light sources.
                    Pair with 4 in-series AAA batteries, LM386 Op-Amp and a couple wires... kids love 'em.

                    • Primary use:
                    • Personal
                    • Was this a gift?:
                    • No
                     
                    3.0

                    Sensitive

                    By Dan the leaf raker

                    from Stanton, Mi

                    About Me Casual User

                    Pros

                    • Good Length
                    • Rugged
                    • Versatile

                    Cons

                      Best Uses

                      • Arduino
                      • Experimenting

                      Comments about RadioShack® 5mm Ambient Light Sensor (5-Pack):

                      I used this on an Arduino project set up as Zack has suggested. Mine where extremely sensitive. The smallest amount of light, even through the bottom of it and it will switch.

                      • Primary use:
                      • Personal
                      • Was this a gift?:
                      • No

                      (5 of 6 customers found this review helpful)

                       
                      3.0

                      It's a Phototransistor

                      By Zack Freedman of Voidstar Lab

                      from Hoboken, NJ

                      About Me Power User

                      Pros

                      • Available At Retail
                      • Good price
                      • Visible And Ir Light

                      Cons

                      • Low gain
                      • No Datasheet Available
                      • No Internal Amplification
                      • Strongly Directional

                      Best Uses

                      • Interruptors
                      • Line Following
                      • Self-adjusting Lights

                      Comments about RadioShack® 5mm Ambient Light Sensor (5-Pack):

                      It's a straight-up phototransistor. You can Google this to get more information about how to use it.

                      For Arduino, create a voltage divider with this and a 1M resistor to sense bright light.

                      Since it has no internal amplifier, you may want to buffer it through an op-amp or high-gain transistor to stabilize the readings.

                      For interruptor or coupler applications, use a clear LED with a high brightness (mCd) rating. It's not sensitive enough to detect diffused lights well.

                      • Primary use:
                      • Personal
                      • Was this a gift?:
                      • No

                      Displaying reviews 1-6

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