In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:

I do try to keep things simple.  As it turned out, the LEDs I got from Mouser were tremendously bright so I've had no troubles with the 470s which limits the RC port current to a safe setting when multiplexing is used as in that project.  If you want to be really safe you can put in 1Ks.  I ran that thing on my desk for over a month and as part of a costume (those of us in the Halloween industry get a head start on parties with trade show gatherings) and never had a lick of trouble.  I sent my prototype to Ken Gracey to play with so he can confirm for you that it works well.

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