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RadioShack® Adjustable-Voltage Regulator LM317T

Model:

LM317T

 | Catalog #: 276-1778
Price:
$3.49
$3.49
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RadioShack® Adjustable-Voltage Regulator LM317T
Price:
$3.49
$3.49
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RadioShack® Adjustable-Voltage Regulator LM317T

Price:
$3.49
$3.49

4

  • Type LM317T
  • Case style: TO-220
  • Maximum output current: 1.5A

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Availability:

ONLINE In stock
Usually ships in 1 - 2 business days
IN STORE
Available at most stores, find it near you


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Product Summary

Your headquarters for voltage regulators.

Want options for your output voltage? This regulator has an adjustable range from +1.2 to 37VDC. May require heatsink in some applications.

  • Type LM317T
  • Case style: TO-220
  • Maximum output current: 1.5A

You'll also need

  • May require heatsink in some applications
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.

What's in the box

  • Type LM317T adjustable voltage voltage regulator - case TO-220 (1)
 

Shipping

Usually ships in 1 - 2 business days

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Other ways to get it


In store: Check availability
By phone: 1-800-843-7422

Manufacturer Warranty

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

Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews
RadioShack® Adjustable-Voltage Regulator LM317T
 
4.4

(based on 25 reviews)

Ratings Distribution

  • 5 Stars

     

    (13)

  • 4 Stars

     

    (10)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

100%

of respondents would recommend this to a friend.

Pros

  • Reliable (18)
  • Versatile (16)
  • Rugged (6)
  • Good length (4)

Cons

    Best Uses

    • High-end equipment (4)
      • Reviewer Profile:
      • Enthusiast (13), Power user (4), Casual user (3)
      • Primary use:
      • Personal (22), Business (3)
      • Was this a gift?:
      • No (11)

    Reviewed by 25 customers

    Sort by

    Displaying reviews 1-10

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    (2 of 2 customers found this review helpful)

     
    3.0

    Packaging Information Bad

    By Carduino

    from Akron,Ohio

    About Me Enthusiast

    Verified Reviewer

    Pros

    • Versatile

    Cons

      Best Uses

        Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

        The pinout is wrong on the package. Burnt two up before I figured it out! Download data sheet from ST Micro before wiring up the regulator to get correct information.

        • Primary use:
        • Personal
        • Was this a gift?:
        • No
         
        5.0

        Comes with super easy circuit for build

        By krklek

        from Des Moines, IA

        About Me Casual User

        Verified Reviewer

        Pros

        • Easy to use
        • Versatile

        Cons

        • None

        Best Uses

        • Experimentation
        • Hobbiest
        • Hobbyist

        Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

        I found the circuit for this on the back of the package and it was perfectly readable and easy to understand. My variable PS [power supply] was up and running in about 20 minutes.

        I have a Nickle Metal Hydride battery charger that works on new batteries but I made this improvised PS to charge those batteries that the charger wouldn't. I also have a small 6v DC radio with internal rechargeable batteries that I use with this PS.

        When pulling close to or over an amp, this will get hot, so make sure you mount it on a heat sink or on the side of a metal cabinet or box to dissipate the heat it will produce. I also put a 1 milli-amp meter in the circuit so I could read the voltage directly rather than having to resort to a volt meter every time I changed the voltage.

        My input DC supply voltage was a little over 26.5 volts from a modified transformer and the circuit does produce 1.2 volts to 26.5 volts.

        NOTE - this does NOT turn AC voltage into DC voltage. You will need a rectifier circuit proceeding this item's circuit to perform as expected. Simply hook them into series, + plus to + and - negative to -. And even though an input capacitor is only required if the supply voltage is quite a distance away from this circuit, I went ahead and used one anyway just to make sure that no noise or ripple was introduced into the circuit.

        I ABSOLUTELY recommend this item. It's cheap and easy to hook up, and you should be very happy with its' performance!!! I know I was ;-)

        • Primary use:
        • Personal
        • Was this a gift?:
        • No
         
        5.0

        vtvm power supply (battery eliminator)

        By ss427chuck

        from hickory hills il

        About Me Enthusiast

        Verified Reviewer

        Pros

        • Consistent Performance
        • Rugged
        • Versatile

        Cons

          Best Uses

          • Equipment Upgrade
          • High-End Equipment

          Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

          an easy fix to save me batteries in my antique equioment

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

          (5 of 6 customers found this review helpful)

           
          4.0

          Misconception

          By SOLAR RADIO GUY

          from Moreno Valley, CA

          About Me Enthusiast

          Pros

          • Consistent Performance

          Cons

          • Confusing drawings

          Best Uses

            Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

            The pin configuration on the package does not match the pin configuration from the schematic on the package. NOT helpful.

            Radio Shack and the manufacturer need to correct the information on the package.

            Be careful when you put the voltage regulator into a circut. Go on the web and download a product data sheet which will show the PROPER pin configuration.

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

            (2 of 2 customers found this review helpful)

             
            5.0

            Readily Available and Functional

            By JML Enterprises

            from Shermans Dale, PA

            About Me Enthusiast

            Verified Reviewer

            Pros

            • Consistent Performance

            Cons

            • None

            Best Uses

            • Electronics Projects
            • Home audio

            Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

            I needed a panel-mounted clean power supply for my giant 7-band audio spectrum analyzer. I've collected many wall-mounted DC adapters from discarded equipment and had been using one of those during the development phase. All but two of them produced stray signals in the 120V lamp display matrix when the source audio signal was paused, which made me concerned that I would run into this problem with a purchased panel-mount unit. I decided to first try building my own unit, so I bought a 12.6V 300mA transformer; a 1.4A, 100V full-wave bridge rectifier; a 1N4004 diode; and an LM317T regulator. When I assembled these components with resistors and capacitors that I already had, I was able to produce a 5VDC output that generated no stray signal output in the. Everything performed to my highest expectations. I am extremely satisfied.

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

            (0 of 1 customers found this review helpful)

             
            4.0

            Needs a Heatsink

            By Gunner

            from Greenville, NC

            About Me Enthusiast

            Verified Reviewer

            Pros

            • Consistent Performance

            Cons

              Best Uses

              • High-End Equipment

              Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

              This device, Voltage Regulator 276-1778 clearly should have a heatsink but none is associated with this product in the catalog nor do store employees have any idea what a heatsink is or what electronic components are for. Product worked well but sadly if you are not sure how to utilize it there will be no help from RadioShack. In other words product was great customer service not observed.

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

              (3 of 3 customers found this review helpful)

               
              4.0

              Package diagram and pinout is correct

              By PC Tech

              from PA

              About Me Power User

              Verified Reviewer

              Pros

              • Versatile

              Cons

                Best Uses

                  Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

                  Used this to power a camera in a car. Works great. Definitely recommend using a heat sink(lesson learned). The diagram and pinout on the package is correct(contrary to what some are posting).

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

                  (10 of 10 customers found this review helpful)

                   
                  5.0

                  Great Adjustable Voltage Regulator

                  By Anonamous

                  from NJ

                  About Me Casual User

                  Verified Reviewer

                  Pros

                  • Consistent Performance
                  • Good Length

                  Cons

                    Best Uses

                      Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

                      In case anybody needs the equation to figure out how to get the output voltage to be what they want, here it is. Vout = 1.25V( 1 + R2/R1)

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

                      (1 of 1 customers found this review helpful)

                       
                      5.0

                      Glad Radio Shack was open Sun at 730

                      By DDD

                      from Minneapolis MN

                      About Me Power User

                      Pros

                      • Consistent Performance
                      • Glad Radio Shack was open
                      • Rugged
                      • Versatile

                      Cons

                        Best Uses

                        • Repairs make a PSU

                        Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

                        Very glad Radio Shack was open at 730 on a sunday night and had this in stock. Was building a linear PSU and thought I had some 317's in my stock but they were not there....thought I would have to wait but didnt have to. Almost surreal that they were still open! Hope they do not slim down the components section of Radio Shack any more than they already have over the last 20 years.

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

                        (3 of 3 customers found this review helpful)

                         
                        5.0

                        Used to make ATV Rectifier/Regulator

                        By Ken

                        from Mullens

                        About Me Enthusiast

                        Verified Reviewer

                        Pros

                        • Versatile

                        Cons

                        • None

                        Best Uses

                        • Voltage RegulatorRectifi

                        Comments about RadioShack® Adjustable-Voltage Regulator LM317T:

                        I wrote another review further down describing how I fried some parts, well I'm back with new parts for my 110cc ATV voltage regulator. I had to substitute the (R1 240 ohm) with a 220 ohm & the (R2 5K ohm) with a 10K ohm "my Radio Shack didn't have them". I used the smallest ABS project enclosure I could find (270-1801) and cut a 1" square hole in the top so I could attach the LM317T heat sink to a 2" square aluminum heat-sink I stole from an old PC video card. After sanding enclosure to score the mating surfaces I attached & sealed the aluminum heat-sink to the ABS enclosure with a bead of JB-Weld. Drilled a 1/8" hole through my heat-sink and bolted the LM317T heat-sink to it. I used my 19v Black and Decker battery again to set the regulated output voltage at 13.2v. I got the circuit working again and made sure that all solder connections where solid and no plug wires from my ATV harness where loose. Sealed the whole thing up with some Black RTV and installed it on my ATV. It works great! I have been using it for a month now and the ATV regulator at idle puts out 12.5v, Full throttle puts out 13.23v (0.1amp-1.2amp). My home made regulator only gets warm (never hot), my 12v 4A battery stays charged. PS- one day I had to temporary substitute the ATV 10amp fuse with a 1amp (slow blow) It worked for about 10 minutes then blew. The regulator was putting out more than the fuse could handle, Awesome! PSS- The diagram on the back of the package does make sense if you reference data-sheets from the internet (recommended). The diagram just needs to be better illustrated. The parts and info is there, it just isn't obvious like it should be.

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

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