Hello,
Currently a beginner with the Arduino, but hope to achieve more. I am currently writing programs on the Arduino Uno R3. I recently ordered this RGB LED Matrix from Amazon: http://www.amazon.com/RioRand-TM-LED-Matrix-8x8/dp/B00GOOJD4K/ref=sr_1_7?ie=UTF8&qid=1398874951&sr=8-7
I ordered this without knowing I needed a 'backpack' or module to program the LEDs. Is it possible to connect it to Arduino with a breadboard or anything? Also, it would be great if you have any suggestions on how to code it.
Thanks,
Ramzeez100
RGB 8x8 matrix is like an 8 anode x 24 cathode matrix.
You need to multiplex it. Standard way is to drive one anode high, and up to 8, 16, or 24 cathodes low (depending if you are turning on just one color, two, or all three).
Best way is 8 PNP or P-channel MOSFET to source all that current to each anode, and 3 shift register like TPIC6B595 to sink current from the cathode.
Set up the cathodes, drive one anode on for 2mS & then off.
Set up the cathodes, drive the next anode on & then off.
Repeat for all 8, and start over.
Let me see if I have schematic showing this.
Thanks CrossRoads,
Unfortunately I don't quite understand what you explained, I know what cathodes and anodes are from a battery perspective, but no idea about multiplexing, PNP, and MOSFET. It would be wonderful if you could elaborate in simpler terms.
Browse the forum, I've posted numersous examples along with code listings.
Here is a common cathode RGB LED example.
