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| hardware:vga_edid_injector [2016/08/26 09:21] – created andi | hardware:vga_edid_injector [2026/07/26 22:17] (current) – external edit 127.0.0.1 | ||
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| - | (copy from https:// | + | # VGA EDID Injector |
| + | {{:hardware:vga_edid_injector_v0.1_annotated_710px.jpg?500|}} | ||
| - | * Description Captures EDID information from a display and presents it to a computer. Useful in situations where the DDC lines are not connected (like the CCH). | + | Captures EDID information from a display and presents it to a computer. Useful in situations where the DDC lines are not connected (like the CCH). |
| * website https:// | * website https:// | ||
| - | * Persons working on Datenwolf | + | * Persons working on: Datenwolf |
| Line 13: | Line 13: | ||
| The VGA EDID Injector provides relief for this kind of situation: It allows to take a snapshot of a display' | The VGA EDID Injector provides relief for this kind of situation: It allows to take a snapshot of a display' | ||
| - | == Hardware | + | ## Hardware |
| The VGA EDID Injector has 3 connectors (see image): | The VGA EDID Injector has 3 connectors (see image): | ||
| - | D-Sub 15 H (VGA) female, left side of the board – connect to display device | + | * D-Sub 15 H (VGA) female, left side of the board – connect to display device |
| - | D-Sub 15 H (VGA) male, right side of the board – connect to computer | + | * D-Sub 15 H (VGA) male, right side of the board – connect to computer |
| - | Micro-USB, lower side of the board – for providing auxiliary power (+5V); upcoming firmware revisions will provide a command line interface | + | * Micro-USB, lower side of the board – for providing auxiliary power (+5V); upcoming firmware revisions will provide a command line interface |
| - | {{: | ||
| + | ## Usage | ||
| + | ### Snapshoting Display EDID information | ||
| + | |||
| + | To snapshot the EDID connection you have to insert the injector in reverse direction. This typically requires you to use the VGA gender changer (orange mesh bag) and the VGA cable (blue mesh bag). | ||
| + | |||
| + | * Connect the display to the left side, female VGA connector. | ||
| + | * Plug the right side, male VGA connector into a computer | ||
| - | == Usage | ||
| - | === Snapshoting Display EDID information | ||
| - | Connect the display to the left side, female VGA connector. | ||
| - | Plug the right side, male VGA connector into a computer | ||
| Using the display control tools refresh/ | Using the display control tools refresh/ | ||
| The VGA EDID Injector can now be spliced into the computer side of a video signal only (i.e. no DDC signals) connection. | The VGA EDID Injector can now be spliced into the computer side of a video signal only (i.e. no DDC signals) connection. | ||
| - | === Replaying snapshoted EDID information | ||
| - | Simply insert the VGA EDID Injector into the video signal connection close to the computer. | ||
| - | Important Notice: There must be no DDC signals present on the display side of the connection. Otherwise the VGA EDID Injector will try to attempt to snapshot the information found there and, if successful, will overwrite the previously snapshoted EDID information. | + | ### Replaying snapshoted EDID information |
| + | Insert the VGA EDID Injector into the video signal connection close to the computer, as pictured above. | ||
| + | |||
| + | **Important Notice:** There must be no DDC signals present on the display side of the connection. Otherwise the VGA EDID Injector will try to attempt to snapshot the information found there and, if successful, will overwrite the previously snapshoted EDID information. | ||
| In that case it is recommended to prepare a special VGA cable in which the signal carried over the pins 12 and 15 is severed (simply removing the pins from one of the connectors with some side cutters and/or pliers will do the trick). | In that case it is recommended to prepare a special VGA cable in which the signal carried over the pins 12 and 15 is severed (simply removing the pins from one of the connectors with some side cutters and/or pliers will do the trick). | ||
| - | === Micro-USB connector | + | ### Micro-USB connector |
| An upcoming firmware release will provide a command line interface over USB CDC ACM serial device emulation. Until then the Micro-USB connector serves for supplying auxiliary power (+5V). Under normal circumstances the VGA connection will provide +5V, 50mA(max) over pin 9. However long cable lengths or a " | An upcoming firmware release will provide a command line interface over USB CDC ACM serial device emulation. Until then the Micro-USB connector serves for supplying auxiliary power (+5V). Under normal circumstances the VGA connection will provide +5V, 50mA(max) over pin 9. However long cable lengths or a " | ||
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| Hence should the VGA EDID Injector seem to be nonoperational it is suggested to provide auxiliary power through the Micro-USB connector. | Hence should the VGA EDID Injector seem to be nonoperational it is suggested to provide auxiliary power through the Micro-USB connector. | ||
| + | |||
| + | (copy from https:// | ||