In the previous installment of the PICAXE Primer, we developed a serially interfaced four-digit peripheral LED display that can be used in any PICAXE project - even one powered by the little 08M.This month, well experiment with three different programs for our display and one for our 28X1 master processor. First, we'll try out a simple program to count from 0 to 9999, and then we'll throw in a little "zero-blanking" for good measure. When our LED display has learned how to count, we'll install driver software on it that will enable our master processor to send serial data to the LEDs using only one output pin.
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