cid144
Newbie level 1
Hi I'm currently working on my first LED matrix. The problem I have run into is how to power it correctly. The Rows of 19 are the cathode and the columns of 13 are the anode. The LED's are standard red. I estimate that I'll need 260 ma per column to correctly power the matrix. I intend to use 2 uln2803's to sink the rows. My problem is how to power them I'm trying to shy away from using any of the UDN drivers. I will be controlling the matrix with a pic18f4685. Any help would be greatly appreciated. Mind you this is only my second project. My first was a 5v and 3.3v switchable power supply for my breadboard which works great. Attached is the schematic of what I have assembled already.
