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Step 4MockUp
In order to make sure I understood how the LED array should be fabricated, I made a 3x3 array to see if the soldering and programming would work. They did! So I decided to go ahead with the project. If you are sure you understand the LED array, skip this step. Otherwise, invest a couple of LEDs, some wire, shrink wrap, and an hour or so in making the 3x3 array and testing it out. The details of making the array are in the following steps but are applicable to the mockup.
To create the 3x3 LED matrix, follow and modify the steps Making the LED Matrix that describe the full matrix.
The sample code below for the mockup does not take advantage of the MIC2981 (I wrote it before I had one :-). Each LED is illuminated in turn. This works for a 3x3 array but does not scale well. [Actually, it scales reasonably well to the full matrix but the LEDs are a bit dim.]
To create the 3x3 LED matrix, follow and modify the steps Making the LED Matrix that describe the full matrix.
The sample code below for the mockup does not take advantage of the MIC2981 (I wrote it before I had one :-). Each LED is illuminated in turn. This works for a 3x3 array but does not scale well. [Actually, it scales reasonably well to the full matrix but the LEDs are a bit dim.]
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