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Author Topic: how come the 3rd and 4th leds emit little light?  (Read 641 times)
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i have 4 leds connected to 4 different ports and one common GND, first 2 leds work perfectly fine but once it gets to the third and fourth led, they seem to have low electric current flowing through them...
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i have 4 leds connected to 4 different ports and one common GND, first 2 leds work perfectly fine but once it gets to the third and fourth led, they seem to have low electric current flowing through them...
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Are all 4 ports set to outputs with pinMode?
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thank you!!
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Wiring diagram. Code.

Thanks.
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Quote
low electric current

The electric company didn't provide quality electronics. The fault has nothing to do with your hardware  / software.
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http://arduino.cc/forum/index.php/topic,126973.0.html
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Quote
low electric current

The electric company didn't provide quality electronics. The fault has nothing to do with your hardware  / software.


The hardware that we cannot see, and the code that is not provided.
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I don't think you connected the grounds, Dave.
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Cross posting wastes time.
Don't do it.

Threads merged.
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Don't forget current limiting resistors or all 4 will eventually be dim...
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