at the moment I am planning my first real (big) electronics project. I want to build a LED lamp, that can be controlled by a RaspberryPi (for e.g. programming a binary clock or changing the brightness according time of day). I built this schematic for the project (also at the end of the question as a image, as this is a .pdf).
There are two main problems giving me headaches:
I wonder if the LEDs will be a) faded/animated smoothly and b) provided constant/non-fluctuating power, because there are a Pi, a AtTiny, five TLC5940 and far too many other LEDs. I currently want to use a fairly standard switching power supply
I have no experience at all with µControllers except a little bit of arduino testing, so, will my idea of using the Pi to write the PWM data (at inconsistent timings) while using the attiny for clocking the TLC5940s (at consistent timings) work? I intended to send a READY signal from the Pi to the attiny so it knows it can BLANK and restart the PWM counters and maybe can slow down a bit (it has a too high clock speed for this application anyway, doesn't it), though I have no idea how to the latter program at this point.
so, yeah, I would greatly appreciate it if someone has any ideas for these two issues
as a little more information here is a "blueprint" like drawing of the lamp :D
thanks in advance!
EDIT: Just noticed I confused the XLAT and XERR ... I want to read the error flags and have an output to the latches, not the other way around. I'll leave as it is for the time being though