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Topic: how come the 3rd and 4th leds emit little light? (Read 730 times) previous topic - next topic

yangfizz

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...

yangfizz

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...

CrossRoads

Are all 4 ports set to outputs with pinMode?
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.


Nick Gammon

Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

dhenry

Quote
low electric current


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

codlink

http://arduino.cc/forum/index.php/topic,126973.0.html
//LiNK

Nick Gammon


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.
Please post technical questions on the forum, not by personal message. Thanks!

More info:
http://www.gammon.com.au/electronics

AWOL

Cross posting wastes time.
Don't do it.

Threads merged.
"Pete, it's a fool looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.

James C4S

Don't forget current limiting resistors or all 4 will eventually be dim...
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

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