32 LEDs with less than 20mA

[rsocor01]

Just an example of how little current is required to light 32 LEDs simultaneously

Not really . I have a similar project where I drive 8 digits in an LED display by multiplexing them one at a time. Also, to the naked eye they all appear to be ON at the same time.

[Demon]

They are lit simultaneously, but look at the code, they blink one at a time.

[Heckler]

Wow demon,

that's a LOT of LED's

Hop over to ebay and search on "rapid prototyping LED"
You will find some nice little LED modules all wired up with resistors ready to pop into your bread board. Just ordered me some green ones.

They are all 6 LED's per module I couldn't find any that were 8. But still pretty nice and easy to use.

[Heckler]

actually here are some that are 8 LED's per module.
But they are a little different in the way they pinout
and quite a bit more money... about $10US including shipping versus about $2 shipped for the 6 LED ones.

http://www.ebay.com/itm/Rapid-Protot...#ht_2014wt_805

[Demon]

Did I mention I have a boatload of Leds and resistors? LOL

I bought a wide variety on ebay several years ago, knowing I'd use them in projects eventually.

I have enough "stuff' to print barcodes and start an inventory (future android project).

So many ideas, so little will power.

Robert


Edit: oh yeah, those are neat. Must cut down on setup time when you have a lot in your circuit.

[Demon]

I'm down to 3mA on the blinking LED without a resistor.

I posted test results over on the Indexing thread
http://www.picbasic.co.uk/forum/show...843#post124843
along with my code.

Just have to rewire my breadboard to remove current-limitting resistors altogether, again, just redid using 270ohm gang resistors. Darn it's tedious.

Still have to tweak my code to use Darrel's interrupts instead of PAUSE to be able to use interrupt on buttons later.

Robert

[Charlie]

You should also put them in a matrix to reduce the number of pins (and wires) required.