A very simple cheap and sometimes usefull project that you can use for adjust or check TV / Monitors Linearity ( with VGA - input )
Step 1: Components:
- 1 - Arduino UNO - R3
- 3 - Resistors - 470 r
- 3 - Diodes - 1N4148
- 1 - Mini Pot ( Trimmer - 10k )
- 1 Connector - DB 15 ( female ) or a VGA cable 9 cutted in the midlle .
- 1 box for fix the Connector ( DB 15 - VGA ) ...or a VGA Cable - cutted in the midle .
Step 2: The Sketch
The version used for copile the Skecth was Arduino IDE 1.8.7.
Step 3: Schematics
I used the Digital outputs of Microcontroller alike :
D 5 - Red " beam "
D 6 - VSYNC
D 7 - HSYNC
D 8 - Green " beam "
D 9 - Blue " beam "
The only reason for diodes, resistors and the ( MIni Pot - Trimmer ) are juts for drop the Voltage for 0.7 v ( required levels ) for lcd & leds Monitors .
The levels of the Colors are affeccted directly ...like you will see into your gadget !
Have Fun !