![]() ![]() We do not take any responsibility for possible errors in the guide or errors that you might do wiring it up. But I could not test this at this time because the second display was totally bad, I will test and revisit chaining once I get more such matrix displays. ![]() In theory the plugin supports chaining up to 8 such matrixes on the same SPI bus and controlling them all. ![]() But then I found the fault in it and repaired it with a little bit of soldering. I had hellish time doing this example as I started out with two such displays, one was completely broken and the other would not turn on one of its rows. So I ended up with making a plugin which acts as device driver for the LED_MATRIX. The plugin comes free of charge for everyone. This guide will be updated when I have tackled this problem.ĭealing with this one in only Xojo code turned out to be a bit hellish. If you have big power supply then you should be ok with one such display, don’t try to daisy chain for now, I had 2,5 A power supply. When I was working on next step in this to daisy chain more than one on same bus then I measured some extreme power usage at startup when the Raspberry PI booted until the application was running. In this example we going to connect a MAX7219_LED_MATRIX and control it with the SPI bus on the Raspberry PI.
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