VGA out for cubieboard
Because my TV is used mainly for watching. I need an alternative display output for my cubieboard. The easiest way is using CVBS pin, and attach it to RCA jack to connect to video input. But I don't have another display with video in, so I need to built VGA out for the cubieboard.
Component needed :
- 3 x 75 ohm low-tolerance resistors.
- 1 x 74ACT08D quad AND gate.
- 2 x bat54s SCHOTTKY diodes (I can't find it in my local store, so I change it with 4 x bat85s or any SCHOTTKY diodes).
- 1 x 100 nF low-tolerance capasitor.
- 1 x VGA DB15 connector.
script.bin:
[disp_init]
disp_init_enable = 1
disp_mode = 0
screen0_output_type = 4
screen0_output_mode = 4
screen1_output_type = 2
screen1_output_mode = 14
fb0_framebuffer_num = 2
fb0_format = 10
fb0_pixel_sequence = 0
fb0_scaler_mode_enable = 1
fb1_framebuffer_num = 2
fb1_format = 10
fb1_pixel_sequence = 0
fb1_scaler_mode_enable = 1
disp_init_enable = 1
disp_mode = 0
screen0_output_type = 4
screen0_output_mode = 4
screen1_output_type = 2
screen1_output_mode = 14
fb0_framebuffer_num = 2
fb0_format = 10
fb0_pixel_sequence = 0
fb0_scaler_mode_enable = 1
fb1_framebuffer_num = 2
fb1_format = 10
fb1_pixel_sequence = 0
fb1_scaler_mode_enable = 1
after everything ready, you can turn on your cubieboard on a monitor with VGA jack. If everything went right, the output should be displayed in your monitor.
Here you can see the picture of working vga out in cubieboard using ubuntu image from miniand.com :
Sources:
http://www.cubieforums.com/index.php/topic,104.0.html
https://groups.google.com/forum/#!msg/cubieboard/vSdUzKoY6S0/AL6kuShCdCIJ
Here you can see the picture of working vga out in cubieboard using ubuntu image from miniand.com :
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http://www.cubieforums.com/index.php/topic,104.0.html
https://groups.google.com/forum/#!msg/cubieboard/vSdUzKoY6S0/AL6kuShCdCIJ
Comments
Thanks.
I use pin 1 U15 for +5v and pin 25 U15 for ground. But I think you can use another pin which have +5v or ground.
I'm planning on buying a cubieboard, but I wonder if this VGA stuff will work with pre installed android version?
I see the screen shoot says it was Ubuntu not Android, so which setting should I change on the android?
Since I have only VGA monitor and don't have any HDMI monitor, will it be some ways to edit the setting?
This is my first experience with cubieboard and linux then I suppose my question can be trivial.
I have a baseboard and I connected the cubieboard, now if I want to use the VGA connection, I need to create a script.bin files with the instructions declared on top.
The question is: what is the pat for the script.bin file?
Are need other actions to use the VGA connection for the cubiboard video output ?
Thanks
I saw on images on top you can redirect the output od ubuntu on VGA.
I searched on file system but I do not found any script.bin.
I mounted the microsd with a card reader, I found the script.bin files and I changed the settings.
Thanks for your help
Ciao
Is there any alternative for this 74ACT08D IC?
I can't get it in my country :(
Please help
Any suggestions`?
From my little knowledge about digital electronics (I'm an EE student btw), the quad AND gates apparently just function as buffers as the output is the exact same logic state.
Do you think replacing the quad gates with buffers will also do the trick? Just being curious
Btw, greeting from fellow Indonesian ;)