LED Matrix Driver

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perigalacticon
Posts: 6
Joined: Mon Aug 08, 2016 3:18 am

LED Matrix Driver

Post by perigalacticon » Wed Jul 12, 2017 11:43 pm

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.

ktmglen
Posts: 7
Joined: Thu May 03, 2007 7:56 pm

Re: LED Matrix Driver

Post by ktmglen » Thu Jul 20, 2017 10:15 am

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/

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