This module has another name: Gert-VGA adapter, or passive VGA adapter 666 Raspberry B+ 

Raspberry has an HDMI port connected to the monitor. If your monitor has only VGA , then you have to use an adapter to connect your monitor. Since the D / A conversion adapter is more expensive and less suited to the specific environment in which the raspberry is used, we use this suitable raspberry solution.

This VGA666 switching devices can not support Raspberry Pi A -type and B plate , as GPIO pin count does not match.

Now Raspberry Pi B + , raspberry send 2 ,  B -type, Raspberry Pi 3  has a 40 th GPIO pins of the module can be used.

With this module, you can implement a locally connected VGA monitor, which also means that you can use it as anauxiliary monitor next to HDMI . Unlike composite video, the DPI interface can operate independently of theHDMI interface.

Dual-screen software is still in the development stage, will soon be officially compatible.

Running the maximum resolution of the two screens will consume SDRAM bandwidth, and still to be tested. (And there is a problem: as the motherboard uses most of the GPIO pins, it means that the specific functions of GPIOcan not be used because of the occupation) 

Product Features:

VGA output supports the same resolution as HDMI

In the case of 60fps support resolution of 640 × 480 to 1920 ×  1024

The highest resolution pixel quality is almost as good as HDMI

for each channel . 6 -position a maximum of 262,144 colors

easy installation and configuration, plug and play

You can use it as an HDMI next to a secondary monitor

Size:  64.00 mm x 32.24 mm

Weight:  16.48 grams

Instructions:

In accordance with the following figure to access the raspberry pie GPIO pin, pay attention to the direction and the intensity of the plug.

And then will burn the latest system (the current tutorial only supports Raspbian system) TF card into the computer, through the editor to open the TF card / boot partition config.txt file, and then change the configuration into the following:

framebuffer_width = 800 
framebuffer_height = 600 
dpi_group = 2 
device_tree = bcm2710-rpi-3-b.dtb 
dpi_mode = 86 
dtparam = i2c_arm = off 
dtparam = spi = off 
dtparam = uart0 = off 
dtparam = uart1 = off 
dtoverlay = pi3-disable-bt -overlay 
dtoverlay = vga666 
enable_dpi_lcd = 1 
display_default_lcd = 1 
force_pwm_open = 0 
dtparam = audio = on 
start_x = 1 
gpu_mem = 128

And then save the exit, the TF card into the raspberry pie, through the use of VGA cable to connect the monitor and VGA666 module VGA interface, and then start the raspberry pie, you can see the graphics.

Here to emphasize the configuration of the framebuffer recommended to use our 800 and 600 , because if the number is large, will produce some delay in the state. Will affect the viewing effect.