How do I figure which LED I need?












4















I need to replace two LED diodes on a TP4056 board (bottom right corner on the picture).



Enter image description here



The board is going to be in a box and I want to move diodes to the small holes in the box.



There are two resistors with marks 102, and that is 1 kilohm. I measured voltage on diodes and my multi-meter said 2.7 V.



I want to use something like this:



Enter image description here



Those diodes are 3 V 20 mAh. Can they replace exiting diodes?






led resistors diodes







share|improve this question









New contributor




mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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  • Welcome to EE.SE. For this question to be any use to future readers it is important that you include the images inline in your question so that it still makes sense when the eBay links die. Not many of us will follow links just to understand what you are asking about. There should be enough information in the question to answer it. The current rating of diodes will be in mA, not mAh which is used as a measure of energy capacity in a battery. There is an edit link below your question ...

    – Transistor
    15 hours ago


















4















I need to replace two LED diodes on a TP4056 board (bottom right corner on the picture).



Enter image description here



The board is going to be in a box and I want to move diodes to the small holes in the box.



There are two resistors with marks 102, and that is 1 kilohm. I measured voltage on diodes and my multi-meter said 2.7 V.



I want to use something like this:



Enter image description here



Those diodes are 3 V 20 mAh. Can they replace exiting diodes?






led resistors diodes







share|improve this question









New contributor




mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





















  • Welcome to EE.SE. For this question to be any use to future readers it is important that you include the images inline in your question so that it still makes sense when the eBay links die. Not many of us will follow links just to understand what you are asking about. There should be enough information in the question to answer it. The current rating of diodes will be in mA, not mAh which is used as a measure of energy capacity in a battery. There is an edit link below your question ...

    – Transistor
    15 hours ago
















4












4








4








I need to replace two LED diodes on a TP4056 board (bottom right corner on the picture).



Enter image description here



The board is going to be in a box and I want to move diodes to the small holes in the box.



There are two resistors with marks 102, and that is 1 kilohm. I measured voltage on diodes and my multi-meter said 2.7 V.



I want to use something like this:



Enter image description here



Those diodes are 3 V 20 mAh. Can they replace exiting diodes?






led resistors diodes







share|improve this question









New contributor




mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












I need to replace two LED diodes on a TP4056 board (bottom right corner on the picture).



Enter image description here



The board is going to be in a box and I want to move diodes to the small holes in the box.



There are two resistors with marks 102, and that is 1 kilohm. I measured voltage on diodes and my multi-meter said 2.7 V.



I want to use something like this:



Enter image description here



Those diodes are 3 V 20 mAh. Can they replace exiting diodes?






led resistors diodes




led resistors diodes






share|improve this question









New contributor




mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited 26 mins ago









Peter Mortensen

1,60031422




1,60031422






New contributor




mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked 15 hours ago









mt82mt82

213




213




New contributor




mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






mt82 is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.













  • Welcome to EE.SE. For this question to be any use to future readers it is important that you include the images inline in your question so that it still makes sense when the eBay links die. Not many of us will follow links just to understand what you are asking about. There should be enough information in the question to answer it. The current rating of diodes will be in mA, not mAh which is used as a measure of energy capacity in a battery. There is an edit link below your question ...

    – Transistor
    15 hours ago





















  • Welcome to EE.SE. For this question to be any use to future readers it is important that you include the images inline in your question so that it still makes sense when the eBay links die. Not many of us will follow links just to understand what you are asking about. There should be enough information in the question to answer it. The current rating of diodes will be in mA, not mAh which is used as a measure of energy capacity in a battery. There is an edit link below your question ...

    – Transistor
    15 hours ago



















Welcome to EE.SE. For this question to be any use to future readers it is important that you include the images inline in your question so that it still makes sense when the eBay links die. Not many of us will follow links just to understand what you are asking about. There should be enough information in the question to answer it. The current rating of diodes will be in mA, not mAh which is used as a measure of energy capacity in a battery. There is an edit link below your question ...

– Transistor
15 hours ago







Welcome to EE.SE. For this question to be any use to future readers it is important that you include the images inline in your question so that it still makes sense when the eBay links die. Not many of us will follow links just to understand what you are asking about. There should be enough information in the question to answer it. The current rating of diodes will be in mA, not mAh which is used as a measure of energy capacity in a battery. There is an edit link below your question ...

– Transistor
15 hours ago












3 Answers
3






active

oldest

votes


















7














enter image description here



Figure 1. Typical IV curves for various colours of LEDs. Image source: LEDnique.



Replacement of any of those small indicator LEDs with 3 or 5 mm LEDs should be fine.



A little bit of background theory may help. LEDs have a non-linear relationship between applied voltage and current. The forward voltage also depends on the colour as shown in Figure 1.



Your measured 3 V LED voltage suggests that you've got either white or blue LEDs on the board. With the 1 kΩ resistor in series the current will be limited to a safe value even if you change to one with a lower forward voltage.






share|improve this answer































    6














    Based on the schematic in the datasheet, they're not critical, any LED will do.
    enter image description here






    share|improve this answer
























    • Also, when designing something like this it is very common that the manufacturer just implemented the reference design, so chances are high that you will find a red and green (greed?) LED just like shown here.

      – pipe
      1 hour ago



















    2














    Yes, you can most likely replace the SMD LEDs by any "jellybean" LED. You can easily try it. Do observe the correct LED polarity.






    share|improve this answer


























    • Even getting the polarity wrong is unlikely to hurt anything, it'll just result in the LED not lighting, while the rest of the circuit works normally. And the LED won't be harmed either, so once installed with the correct polarity, it'll be just fine.

      – Ben Voigt
      11 hours ago











    • Correct. But the LED won't work, that's all I was saying.

      – Wouter van Ooijen
      1 hour ago











    Your Answer





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    3 Answers
    3






    active

    oldest

    votes








    3 Answers
    3






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    7














    enter image description here



    Figure 1. Typical IV curves for various colours of LEDs. Image source: LEDnique.



    Replacement of any of those small indicator LEDs with 3 or 5 mm LEDs should be fine.



    A little bit of background theory may help. LEDs have a non-linear relationship between applied voltage and current. The forward voltage also depends on the colour as shown in Figure 1.



    Your measured 3 V LED voltage suggests that you've got either white or blue LEDs on the board. With the 1 kΩ resistor in series the current will be limited to a safe value even if you change to one with a lower forward voltage.






    share|improve this answer




























      7














      enter image description here



      Figure 1. Typical IV curves for various colours of LEDs. Image source: LEDnique.



      Replacement of any of those small indicator LEDs with 3 or 5 mm LEDs should be fine.



      A little bit of background theory may help. LEDs have a non-linear relationship between applied voltage and current. The forward voltage also depends on the colour as shown in Figure 1.



      Your measured 3 V LED voltage suggests that you've got either white or blue LEDs on the board. With the 1 kΩ resistor in series the current will be limited to a safe value even if you change to one with a lower forward voltage.






      share|improve this answer


























        7












        7








        7







        enter image description here



        Figure 1. Typical IV curves for various colours of LEDs. Image source: LEDnique.



        Replacement of any of those small indicator LEDs with 3 or 5 mm LEDs should be fine.



        A little bit of background theory may help. LEDs have a non-linear relationship between applied voltage and current. The forward voltage also depends on the colour as shown in Figure 1.



        Your measured 3 V LED voltage suggests that you've got either white or blue LEDs on the board. With the 1 kΩ resistor in series the current will be limited to a safe value even if you change to one with a lower forward voltage.






        share|improve this answer













        enter image description here



        Figure 1. Typical IV curves for various colours of LEDs. Image source: LEDnique.



        Replacement of any of those small indicator LEDs with 3 or 5 mm LEDs should be fine.



        A little bit of background theory may help. LEDs have a non-linear relationship between applied voltage and current. The forward voltage also depends on the colour as shown in Figure 1.



        Your measured 3 V LED voltage suggests that you've got either white or blue LEDs on the board. With the 1 kΩ resistor in series the current will be limited to a safe value even if you change to one with a lower forward voltage.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 15 hours ago









        TransistorTransistor

        81.2k778175




        81.2k778175

























            6














            Based on the schematic in the datasheet, they're not critical, any LED will do.
            enter image description here






            share|improve this answer
























            • Also, when designing something like this it is very common that the manufacturer just implemented the reference design, so chances are high that you will find a red and green (greed?) LED just like shown here.

              – pipe
              1 hour ago
















            6














            Based on the schematic in the datasheet, they're not critical, any LED will do.
            enter image description here






            share|improve this answer
























            • Also, when designing something like this it is very common that the manufacturer just implemented the reference design, so chances are high that you will find a red and green (greed?) LED just like shown here.

              – pipe
              1 hour ago














            6












            6








            6







            Based on the schematic in the datasheet, they're not critical, any LED will do.
            enter image description here






            share|improve this answer













            Based on the schematic in the datasheet, they're not critical, any LED will do.
            enter image description here







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 15 hours ago









            Phil GPhil G

            2,234412




            2,234412













            • Also, when designing something like this it is very common that the manufacturer just implemented the reference design, so chances are high that you will find a red and green (greed?) LED just like shown here.

              – pipe
              1 hour ago



















            • Also, when designing something like this it is very common that the manufacturer just implemented the reference design, so chances are high that you will find a red and green (greed?) LED just like shown here.

              – pipe
              1 hour ago

















            Also, when designing something like this it is very common that the manufacturer just implemented the reference design, so chances are high that you will find a red and green (greed?) LED just like shown here.

            – pipe
            1 hour ago





            Also, when designing something like this it is very common that the manufacturer just implemented the reference design, so chances are high that you will find a red and green (greed?) LED just like shown here.

            – pipe
            1 hour ago











            2














            Yes, you can most likely replace the SMD LEDs by any "jellybean" LED. You can easily try it. Do observe the correct LED polarity.






            share|improve this answer


























            • Even getting the polarity wrong is unlikely to hurt anything, it'll just result in the LED not lighting, while the rest of the circuit works normally. And the LED won't be harmed either, so once installed with the correct polarity, it'll be just fine.

              – Ben Voigt
              11 hours ago











            • Correct. But the LED won't work, that's all I was saying.

              – Wouter van Ooijen
              1 hour ago
















            2














            Yes, you can most likely replace the SMD LEDs by any "jellybean" LED. You can easily try it. Do observe the correct LED polarity.






            share|improve this answer


























            • Even getting the polarity wrong is unlikely to hurt anything, it'll just result in the LED not lighting, while the rest of the circuit works normally. And the LED won't be harmed either, so once installed with the correct polarity, it'll be just fine.

              – Ben Voigt
              11 hours ago











            • Correct. But the LED won't work, that's all I was saying.

              – Wouter van Ooijen
              1 hour ago














            2












            2








            2







            Yes, you can most likely replace the SMD LEDs by any "jellybean" LED. You can easily try it. Do observe the correct LED polarity.






            share|improve this answer















            Yes, you can most likely replace the SMD LEDs by any "jellybean" LED. You can easily try it. Do observe the correct LED polarity.







            share|improve this answer














            share|improve this answer



            share|improve this answer








            edited 12 hours ago









            SamGibson

            10.9k41537




            10.9k41537










            answered 15 hours ago









            Wouter van OoijenWouter van Ooijen

            44.3k150118




            44.3k150118













            • Even getting the polarity wrong is unlikely to hurt anything, it'll just result in the LED not lighting, while the rest of the circuit works normally. And the LED won't be harmed either, so once installed with the correct polarity, it'll be just fine.

              – Ben Voigt
              11 hours ago











            • Correct. But the LED won't work, that's all I was saying.

              – Wouter van Ooijen
              1 hour ago



















            • Even getting the polarity wrong is unlikely to hurt anything, it'll just result in the LED not lighting, while the rest of the circuit works normally. And the LED won't be harmed either, so once installed with the correct polarity, it'll be just fine.

              – Ben Voigt
              11 hours ago











            • Correct. But the LED won't work, that's all I was saying.

              – Wouter van Ooijen
              1 hour ago

















            Even getting the polarity wrong is unlikely to hurt anything, it'll just result in the LED not lighting, while the rest of the circuit works normally. And the LED won't be harmed either, so once installed with the correct polarity, it'll be just fine.

            – Ben Voigt
            11 hours ago





            Even getting the polarity wrong is unlikely to hurt anything, it'll just result in the LED not lighting, while the rest of the circuit works normally. And the LED won't be harmed either, so once installed with the correct polarity, it'll be just fine.

            – Ben Voigt
            11 hours ago













            Correct. But the LED won't work, that's all I was saying.

            – Wouter van Ooijen
            1 hour ago





            Correct. But the LED won't work, that's all I was saying.

            – Wouter van Ooijen
            1 hour ago










            mt82 is a new contributor. Be nice, and check out our Code of Conduct.










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