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LM317, LM338, LM396 Calculator

This LM317, LM338 calculator software is used as a tool to determine the value of the
voltage adjusting resistor needed to assign the output of an LM317 to an
allocated degree. Normally R1 is 220 ohms or 240 ohms, however it could very
well be a different value for instance 150 or 470 ohms. Go with a value for R2
and click the "Calculate" button. The LM317 output value is displayed in volts.
Take into account that the input voltage to the LM317 is required to be a
minimum of 1.5v higher than the output voltage. To increase current you can configure an outboard transistor across the input and output pins of the IC

LM317 Voltage Calculator



Calculate LM317 Resistor Values


R1 resistor


R2 resistor


Output Voltage


Reader Interactions

Comments

  1. Justo Ancajima Yarleque says

    September 11, 2022

    Muy buena información me gustaría seguir recibiendo

    Reply
    • Swagatam says

      September 11, 2022

      Thank you!

      Reply
  2. ananda says

    July 19, 2022

    I want to make the current limited PWM Li-Ion charger to charge 15V,/ 6800 mah Li-Ion battery.

    Reply
    • Swagatam says

      July 20, 2022

      Sorry, I do not have a PWM based charger with me at this moment.

      Reply
  3. alfredo schulz says

    July 16, 2022

    sus terminos son exactos,es uno de mis maestros preferidos desde ahora. GRACIAS MAESTRO.

    Reply
    • Swagatam says

      July 16, 2022

      My pleasure Alfredo!

      Reply
  4. Owen says

    February 28, 2022

    Just want you to include feedback on the arduino inverter, thank your the best.

    Reply
  5. Joakko says

    June 23, 2020

    Hi. very, very gooood page.Please write me to send you some circuits and to clear daubs. Thanks so much Joakko

    Reply
  6. Olamide Emmanuel says

    February 22, 2020

    Observing the above software I discovered that the parameters are related by V=(1.37XR)/r. Where V is the outputvoltage, R is R2 and r is r1.
    Please try this with many values of resistors it should swing within this constant.
    Swag. kindly look into my last mail on using micro-controllers to design inverter with just a single transformer.
    Cheers.

    Reply
    • Swagatam says

      February 22, 2020

      OK you mean the reference voltage value is 1.37 V instead of the specified 1.25 V in the datasheet…I have not yet investigated I may do it in my free time…

      Reply
  7. Kannan says

    November 6, 2019

    Very good explained thanks

    Reply

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