In SX Microcontrollers, SX/B Compiler and SX-Key Tool, PJ Allen wrote: [quote="Chris Kraft"] ...I am working on that needs to [u][color=red>individually[/u]] The SX48 has 36 I/Os. You could drive all of your LEDs directly from it, but not at 20mA each. Read up on the drive capabilities in the spec sheet. You could safely do them all from an SX48 if you use a transistor buffer/driver between the SX I/Os and the LEDs, this way the current required from the SX I/O is much less (< 1mA). Now another matter is: what you figure "on" [i]is[/i]. They don't all have to be "on", [i]per se[/i], at the same time. You could strobe all of the outputs, quickly, and the viewer wouldn't know it (persistence of vision, etc.) -- and not have to employ bufferring/transistors to do so. However, this may require some "advanced" programming. [/color][/quote] ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=162118#m162130 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)