MonochromeVGA is a product to enjoy the charm of those monochrome monitors of the time but in the current video systems, and more specifically in your PC monitor. Although it could be connected to any TV, monitor or video system that has VGA inputs.
Select green, amber or B&W as monochromatic color, among others. Change color to monochrome or vice versa easily.Standard monochrome vintage monitors configurations:
Green: Only green at 100% of intensity
Amber: Red at 100% + Green at 75%
B&W: Red + Green + Blue, all at 100%
Connecting it directly in a VGA output, it will bridge and convert the RGB signals to a passive equivalent luminance value with a few resistors, then you just have to select the monochrome output by combining the primary colors red, green and blue using the some buttons.
The luminance is calculated passively and approximately to the following formula:
0.2126*R + 0.7152*G + 0.0722*B
The schottky diodes are intended to prevent the RGB signal from going back and mixing when the switch is selected in color:
In the following video can be seen in operation with the first revision. The color mode display is affected by poor lighting, where saturated colors are displayed. With this lighting I wanted to highlight the monochrome mode:
Now with 3D case too, thanks to Agustin Gallego for designing it:
You can also buy it in kit or fully assembled in my Tindie store:
https://www.tindie.com/stores/spark2k06/
Disclaimer:
It is recommended to use this device inside an shielded container, which can be as simple as a cardboard box lined with aluminium foil, because although unlikely, the VGA signal could interfere with other nearby devices and depending on the laws of your country, it could lead to fines.
Therefore, USE IT AT YOUR OWN RISK.
Comments