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I designed a 30*30 matrix led board can anyone tell me how much voltage do i need to drive whole board? Answered

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steveastrouk
steveastrouk

7 years ago

The correct question is how do I wire 900 Leds, what shape they are in is irrelevant. What supply do you want to run them from ?

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bwrussell
bwrussell

7 years ago

The other comments make good points but lets just roll with it. You can use THIS excellent wizard to help design LED arrays. I can only make assumptions (white LEDs, standard current) but you will need roughly 100V and will be dissipating around 600 W of power.

The issue I see is that i'm guessing the resistors you have chosen are not right since the resistors needed are based on the voltage source chosen.

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lukestanmore
lukestanmore

7 years ago

No, need more information than that... if they are in series, it could be anywhere between 810V and perhaps as much as 1,700V! All depends on the voltage requirements of each LED.

If they are not in series however, you would need anywhere between 0.9V and maybe 2.1V? Again, depending on their requirements. The difference is, youll need a larger current at this low voltage....

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mpilchfamily
mpilchfamily

7 years ago

If you designed the board shouldn't you be able to calculate the voltage required? I take it your expanded upon a common 8 X 8 matrix design without understanding much about how it works? How did you make this 30 X 30 matrix? Did you wire up all 900 into a single matrix? If so that will require quite a bit of voltage. If you want a large display like that it's best to break it up into multiple smaller matrix like a 4 X 4 or 8 X 8. This helps to keep your power needs more manageable. I suggest you look into projects that have larger matrix displays being ran by an Arduino. See how they used multiple 8 X 8 displays.