SparkFun Electronics Forum

Hello,

I am looking for a led matrix driver for arduino that will power a charlieplex matrix of 50 leds that require 40mA at 5V each.

I have tried the IS31FL3731 but my leds are too dim, the current requirement is too high for it.

Do you have a board that will meet my requirement or know where I can look for one?

Thanks.

Check out the TPIC6B595 from TI. Eight 150mA outputs per chip. I built a 16 x 9 matrix bar graph driver for the SparkFun RGB LED bar graph using two of them. If you use my design, the Arduino will need to scan the matrix continuously and you may need bigger PNP transistors than I used. Details on my blog. http://bikerglen.com/blog/driving-a-spa ... bar-graph/