I'm thinking of buying 7 of these: https://www.adafruit.com/product/4732
1) What would I need to connect them together?
2) Would they work in "extended" mode and not in a mirror mode?
3) Could one raspberry pi control all 7?
4) Actually buying 6 of those is enough if I add one of these to them: https://www.adafruit.com/product/2279 and the question is: Is it easy to change the orientation of the last panel to be 64 pixels high and 32 pixels wide? Is this something I would have to do in code or is there an easier way?
5) What is the list of all parts I would need to order to connect all displays together and to the raspberry pi (which I already have)?
Thank you in advance!
Chaining matrixes and necessary parts
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- SaturdayMorning
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- mikeysklar
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Re: Chaining matrixes and necessary parts
You can use the RGB Matrix Bonnet.
https://www.adafruit.com/product/3211
A 16A power supply will get you four panels. There be dragons going bigger than that, but a Pi can drive more it has the necessary memory and processor ability.
https://learn.adafruit.com/rgb-led-matr ... ple-panels
https://www.adafruit.com/product/3211
A 16A power supply will get you four panels. There be dragons going bigger than that, but a Pi can drive more it has the necessary memory and processor ability.
https://learn.adafruit.com/rgb-led-matr ... ple-panels
- SaturdayMorning
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Re: Chaining matrixes and necessary parts
So would the matrix bonnet and the panels be enough?
I don't need any more parts to be able to connect them to the PI?
Also what about this:
4) Actually buying 6 of those is enough if I add one of these to them: https://www.adafruit.com/product/2279 and the question is: Is it easy to change the orientation of the last panel to be 64 pixels high and 32 pixels wide? Is this something I would have to do in code or is there an easier way?
I don't need any more parts to be able to connect them to the PI?
Also what about this:
4) Actually buying 6 of those is enough if I add one of these to them: https://www.adafruit.com/product/2279 and the question is: Is it easy to change the orientation of the last panel to be 64 pixels high and 32 pixels wide? Is this something I would have to do in code or is there an easier way?
- mikeysklar
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- Joined: Mon Aug 01, 2016 8:10 pm
Re: Chaining matrixes and necessary parts
No, you will need a significant power supply > 16A for 4 panels.
Six panels is complicated since we have no documentation showing usage over 4 panels. You also fall into the realm of needing a larger than 20A power supply. While it may be possible it is definitely not worth it if you can make things work with 4 panels.
Adjusting resolution for the last panel in theory looks easy, but I can't point to working examples so again avoid this and stick with symmetric matching panel resolution to ensure your success.
Six panels is complicated since we have no documentation showing usage over 4 panels. You also fall into the realm of needing a larger than 20A power supply. While it may be possible it is definitely not worth it if you can make things work with 4 panels.
Adjusting resolution for the last panel in theory looks easy, but I can't point to working examples so again avoid this and stick with symmetric matching panel resolution to ensure your success.
- SaturdayMorning
- Posts: 3
- Joined: Thu Jan 19, 2023 11:17 am
Re: Chaining matrixes and necessary parts
My project is to make a led display that's the same width as a regular piano and 64 pixels high. Since the leds will not match the keys exactly it would have to be like 3-5 leds per key.mikeysklar wrote: ↑Fri Jan 20, 2023 5:09 pm No, you will need a significant power supply > 16A for 4 panels.
Six panels is complicated since we have no documentation showing usage over 4 panels. You also fall into the realm of needing a larger than 20A power supply. While it may be possible it is definitely not worth it if you can make things work with 4 panels.
Adjusting resolution for the last panel in theory looks easy, but I can't point to working examples so again avoid this and stick with symmetric matching panel resolution to ensure your success.
A regular piano is like 122.5 cm wide and contains 88 keys.
Do you have any suggestions for me how to do this?
- mikeysklar
- Posts: 14165
- Joined: Mon Aug 01, 2016 8:10 pm
Re: Chaining matrixes and necessary parts
I would consider the 5mm and 6mm RGB Matrix panels 64x32 for your project. They are physically larger so you match the sizing requirements of a normal piano and only require 4 or less panels.
; Dimensions: 318mm x 158mm x 15mm / 12.5” x 6.2” x 0.6”
https://www.adafruit.com/product/2277
; Dimensions: 385mm x 190mm x 13mm / 15.2” x 7.5” x 0.5”
https://www.adafruit.com/product/2276
; Dimensions: 318mm x 158mm x 15mm / 12.5” x 6.2” x 0.6”
https://www.adafruit.com/product/2277
; Dimensions: 385mm x 190mm x 13mm / 15.2” x 7.5” x 0.5”
https://www.adafruit.com/product/2276
Please be positive and constructive with your questions and comments.