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1  Using Arduino / Storage / Re: Sd card stops working after a day of use. on: December 17, 2012, 10:56:16 am
Looks like there there are paths through the code where cardFile is opened but never closed.  This will cause a memory leak and SD operations will fail.

SD.h has a nasty property of allocating memory with malloc() when a file is opened and releasing the memory on close.  This often causes memory leaks.

why would the program still work then but the sd card fail?

So a solution would be to open the file after a card read is detected and then close the file when the operation is complete?
2  Using Arduino / Storage / Sd card stops working after a day of use. on: December 17, 2012, 08:44:46 am
I recently finished an rfid door access system for my house and everything works as intended.  The only issue I am having is after about a day of running the system, it will act is if the sd card has been removed or as if it can no longer access the card. 

I have attached a copy of the code I am using. 
3  Using Arduino / LEDs and Multiplexing / Re: other options for rgb addressable strip? on: August 24, 2011, 12:17:40 pm
drats, from what I understood the LPD8806 on that rpg strip handled the current.  As for the two high power led's I am just planning on running them on a logic level mosfet until I get a constant current driver. 

I don't see where you linked to the LPD8806 strip. But yes, most do handle the current on their own. It's only with high power LEDs (like the 3W LED you have linked) that it becomes impractical to use current limiting resistors.

In general though, I think rpg strips are too dangerous to deal with.

FYI he put RPG not RBG  it was a joke on a typo

first I have heard of rgb strips being dangerous.  Is there something I should watch out for?
wow...din't even notice the typo. haha
4  Using Arduino / LEDs and Multiplexing / Re: other options for rgb addressable strip? on: August 23, 2011, 04:24:56 pm
drats, from what I understood the LPD8806 on that rpg strip handled the current.  As for the two high power led's I am just planning on running them on a logic level mosfet until I get a constant current driver. 

I don't see where you linked to the LPD8806 strip. But yes, most do handle the current on their own. It's only with high power LEDs (like the 3W LED you have linked) that it becomes impractical to use current limiting resistors.

In general though, I think rpg strips are too dangerous to deal with.

first I have heard of rgb strips being dangerous.  Is there something I should watch out for?
5  Using Arduino / LEDs and Multiplexing / Re: other options for rgb addressable strip? on: August 23, 2011, 03:24:09 pm
drats, from what I understood the LPD8806 on that rpg strip handled the current.  As for the two high power led's I am just planning on running them on a logic level mosfet until I get a constant current driver. 
6  Using Arduino / LEDs and Multiplexing / Re: other options for rgb addressable strip? on: August 23, 2011, 01:28:53 pm
ouch, well it looks like the ones I linked will be the best bang for my buck.  Seems like they are well documented and shouldn't take too much effort to setup.

only other question I had is if this would be enough power to run two of these these, plus the already mentioned led strip.

from what I can tell the m of led's will draw 1.8 amps, and the high power ones will draw 1.2 amps.
so at 3 amps I feel I should be safe?
7  Using Arduino / LEDs and Multiplexing / other options for rgb addressable strip? on: August 23, 2011, 10:42:19 am
these are the type I am looking for but was wondering if there was any other options?  I do like having the 7bit color per channel and this seems to be one of the few options that offer this. 

basically I will have a 1 meter strip, along with two 3w rgb led's. with the goal being ambiant light and music sync(color organ). 
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