ssistant. Working absolutely fantastic and reliable. I have noticed 2 issues: - one is the same as Gordon and Steve have. Basicaly 1st PWM channel is not turned off completly. If you connect LED strip (24V) on it, you will notice it is ON. CAn not be turned off. Probably there is very low current, because LED strips shines very dimm, but if is dark, you notice it. - second issue is, that when the controller is turned off, and you turn it on it wil very shortly flash - than turn off, and thatn turn on again. Fantastic product, but would be nice if is little tuned to be 100% working as you expect.
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ller library, BUT: For driving 64x64 matrices, this boards/shield requires soldering: You need to connect P4 to GND and P8 zu #E. Either solder two small wires or jumpers like I did (see pictures: before/after). This would be easier if the board already came with jumpers in the right place. I found the tip here: https://w2.electrodragon.com/Board-dat/MPC/MPC1073-DAT/MPC1073-test-log-dat/MPC1073-test-log-dat.md#more-demos However, contrary to what it says there, --led-multiplexing=0 (instead of 1) did the trick so this demo worked after soldering: sudo examples-api-use/demo --led-rows=64 --led-cols=64 --led-multiplexing=0 However, I get quite a bit of ghosting/artefacts when displaying small images and animations on a chain of just 2 64x64 matrices, even after tweaking with things like --led-pwm-lsb-nanoseconds 50 and --led-limit-refresh=240. Thus, driving two 64x64 matrices already seems to be the limit of what the hzeller library and a Pi4B can do, because of the many address lines that 64 x 64 matrices have.
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2. Try the python demo code here: https://w2.electrodragon.com/gollum/search?q=CH423-dat.md Thank you!
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2W It is working great, and the 3rd connector is not being used. I also want to add your I2C to GPIO IO Expander Breaktout Board CH423 as I need 4 more GPIO pins from the Pi. Can I, or how do I connect the expander Board to the HAT or the Pi Zero? Or can I use the spare HAT connector to add 4 GPIO pins Thanks.
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