Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
please share if u schematic modification.thanks beforeFix the HW design.
RGB and H/VSync signals are defined as analog signals (0,7Vss @ 75Ohm). Therefore you have to adapt the 5V PIC signals to this level. This can be achieved by putting a series resistor of 470R in each signal line (together with the 75R termination in the VGA monitor they will act as a voltage divider)
yes..... my first modification to the attachment below test 3pcs VGA monitor results 2pcs OK but 1pc VGA monitor why the result rolling TEXT picture.
modif resistor 150R to 75R test with 4pcs VGA monitor Result same 3pcs vga monitor OK (still image text) dan 1pc VGA monitor images text rolling (running up ):NG should appear TECT if OK, see in attachmentWith my schematic you should see a fullscreen green picture, assuming the HV timing is correct.
Can you describe the results a litte more in detail? What is "rolling text picture" and what "text image noise vertical line"? Maybe you can attach a photo...
The 150R in your attachment should be removed, as the VGA monitors have a builtin 75R termination resistor at each RGB signal. But there are different definitions for the HV signals, depending of the VGA monitor interface (0.7V/5V, see here).
No, the Pulldown resistor should be removed in your schematic, it is already present in the Monitor.modif resistor 150R to 75R
This sounds to me like a timing problem related to the Hsync signal. Maybe the sync pulse is too short to be recognized by this special monitor. Or there are reflections on the Hsync signal line, therefore the 470R series resistor will help.test with 4pcs VGA monitor Result same 3pcs vga monitor OK (still image text) dan 1pc VGA monitor images text rolling (running up ):NG should appear TECT if OK, see in attachment
Thanks brother..,problem is solved and OK Now:-DNo, the Pulldown resistor should be removed in your schematic, it is already present in the Monitor.
Schematic should look like this:
This sounds to me like a timing problem related to the Hsync signal. Maybe the sync pulse is too short to be recognized by this special monitor. Or there are reflections on the Hsync signal line, therefore the 470R series resistor will help.
modif circuit with you according proposalGood to hear this
What was the problem? Have you changed the circuit according to my proposal, or have you modified the SW?