Khung LED Matrix 8x32 mở rộng kèm tấm khuếch tán (diffusor)

I want to have a led matrix to show information of my weather station. 

I  first looked at the design from fractalnoise but one 8x32 matrix does not offer enough space. So I decide to make my own design.

To have more space i make the design expandable and I found that the integration of the diffusor in the frontside of the frame gives the best results for me.

You have to change the filament once during the print (manually or automatic with MMU or Prusa XL). I would suggest to cut away a small part of the frame and do a test print. Depending on the filament the transparent layer might not fuse with the rest. The transparent layer is not a separate part, you can use the modifier in Prusaslicer to configure the different filament or use the layer change function. If you do it yourself the diffuser is 0.8mm heigh otherwise you can use the provided 3mf files for the mini and the xl.

On my project the matrix is controlled by  WLED. On the project page https://kno.wled.ge/ you will find many information.  You can use the esp32 mini or the esp32-s2 mini in this frame.  

I used a digital microphone and mounted it directly to the ESP to reduce cabling in the frame. A socket for the max9814 is also there. 

The TSOP4838 is used for the remote receiver. If you connect more then two  8x32 matrixes you have to reduce the framerate in WLED from 42 to about 23.

With the USB-C board for the power you can use many power supplies or even power banks. But you have to remove the bridge for 12V default on the Board!!!! The Schottky diode prevents the power delivery to the matrix over the USB-C port of the esp32 and protects the board.

I bought the parts over Amazon

ESP32-s2  https://amzn.eu/d/gxJp9OP

ESP32        https://amzn.eu/d/cfELddv

USB-C  Platine    https://amzn.eu/d/7T7iZyO

D-Micro https://amzn.eu/d/czdyhYy

TSOP 4838 https://amzn.eu/d/86uxJMH

but there are other sources too.

If you have any questions feel free to send me a message.

Please check you printers dimensional accuracy. I had to increase the models in PrusaSlicer by 1%. If you want to be on the save side, just do that.

Examples

Prusa XL 32cm:

• everything in “Single Part for big printer folder”
• smal_parts_to_connect_2_modules

Prusa XL > 32cm:

• Print two matrix8_x_32_frontside modules. If you want to connect a IR sensor, you need one matrix8_x_32_frontside with IR sensor.
• matrix8_x_32_backside_cpu_79_8mm
• matrix8_x_32_backside_power_79_8mm
• smal_parts_to_connect_2_modules (one between two modules)

Prusa Mini or equivalent 32cm:

• matrix8_x_32_frontside_without_IR_sensor_right_or_left_162mm
• matrix8_x_32_frontside_with_IR-Sensor_right_162mm (for no IR sensor print the other one twice)
• smal_parts_to_connect_2_modules
• matrix8_x_32_backside_cpu_79_8mm
• matrix8_x_32_backside_power_79_8mm
• matrix8_x_32_backside_mid_part_cable

Prusa Mini or equivalent > 32cm:

• Everything from the 32cm version
• matrix8_x_32_frontside_expansion_160mm (2x for each additional32cm matrix)
• matrix8_x_32_backside_mid_n_159_8mm (2x for each additional32cm matrix)

If you want, you can just print the expansion parts and use the "matrix8_x_32_expansion_border" to close the ends.