It’s also worth noting that this is the “CPU at full load” consumption, which you may not actually need depending on what you’re doing. The recommendation was for a 3A supply for the Pi 4, but they also note the “Typical bare-board active current consumption” to be 600 mA. I was able to boot a Pi 4 with USB OTG mode on a 900mA USB port, and even if it did occasionally throw power warnings it worked fine for a bit of Python development.
Out of curosity Alphanumeric, what did you need those power supplies for? Lots of LEDs?
I started with a Matrix Portal, but struggled with Adafruit’s Circuit Python graphics.
When the Interstate 75 W was released I switched to it.
My matrix is actually two 64 x 32 panels, 128 x 32, as far as Pico Graphics is concerned.
Which required me to get creative to get it to work as a physical 64 x 64.
Yep, it’s not well documented. To be fair, neither were the old Pimoroni graphics modules which is why I ended up writing documentation for it. I don’t think PicoGraphics is overly well done either, but have only got about half of that documented myself.
Interesting that you can chain PicoGraphics matrices like that, do you then daisy-chain the data connection using the ribbon cable connectors on the back of the panels?
I wonder how well the Pi 5 will be able to drive those. Rumours are that the RP1 chip contains an M0 or M4 core, and I’ve seen a few people ask whether or not it can be programmed like a sub-processor on the board. If you could, then the Pi could worry about graphics, and the RP1 could worry about pushing those to the displays.
With Circuit Python I can do the following
base_width = 64 (width of individual panel)
base_height = 32 (height of individual panel)
chain_across = 1 (not chained across)
tile_down = 2 (2 panels tiled down)
serpentine = False (no panels flipped / turned)
Anyone had a Pimoroni shipping notice yet for RPi5?
My order was in by 08:20 on announcement day and I see that Raspberry Pi shop in Cambridge has them on their shelves (I know they are a special case).