# Is there a limit to the number of parallel LED if each has its own resistor?

I am building a circuit with 6 parallel LEDs, powered by 5 volts through a transistor array which can provide 300ma. If each LED is allowed 20ma (by setting the correct resistance for each), I should be able power each LED without a problem. I could even power 12... or 45 LEDs with 1 amp.

Is there anything that limits the number of parallel LEDs that I can power in this manner (besides power consumption?)

Will the voltage drop of one LED impact the others at any point (or would this ever be an issue?)

simulate this circuit – Schematic created using CircuitLab

• You missed the LED symbol in the editor! Depending on the LEDs you may be able to put two per string to double the maximum number of LEDs or halve the current for the original number. The R values would have to be adjusted. – Transistor Apr 12 '16 at 17:28
• Nothing limits it, you are good to go. Or show us the actual circuit, if you have troubles.. – Eugene Sh. Apr 12 '16 at 17:29
• if it is truly parallel each resistor is the same value and each led, then one led or resistor in theory wont affect the other paths more than the accuracy of the components selected would affect it. if they all vary then sure one path may affect the other paths, how much? just do the math. – old_timer Apr 12 '16 at 17:36
• Side note: You do not write what kind of LED you are using. If the forward voltage of the used LED type(s) is below 2.5V, you could put two LEDs in series with one resistor which halves the power consumption and the number of resistors. – ndim Apr 16 '16 at 17:42