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Topic: 16 leds 1 arduino nothing else (Read 1 time) previous topic - next topic

tigerbomb8


tigerbomb8

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IMG_09491 by tigerbomb8, on Flickr 
ok so i have a question currently the leds are getting + from the bottom one than the one on the top, and the - just goes straight to ground, can i make a spare pin ground. so then i can power 1 led at a time

Divyanshu

Well yeah you can, maybe you'll require a lot of wires then? Try adding some resistors for safety, yesterday I blew up a big LED because it was directly connected to the power :(

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mowcius

Quote
Try adding some resistors for safety

You mean "Try adding some resistors cos you need them"

tigerbomb8

what i mean is have pin 13 which is controlling the left 2 leds
and have another 2 pins to act as ground which i can turn on and off, say if pin 2 is the ground for all the top layer
so if i pin 13 is HIGH and then have pin 2 on what ever i should put it on to accept the ground the top left led should turn on

Divyanshu

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Christian Møhring Madsen

#6
Jan 03, 2011, 03:51 pm Last Edit: Jan 03, 2011, 03:52 pm by c_masden Reason: 1
Have a look at Charlieplexing for inspiration:
http://en.wikipedia.org/wiki/Charlieplexing

Notice the resistors.  :)


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