VGA Connect RCA Interface Converter ----- VGA-RCA Converter

VGA connection RCA interface converter Often encountering the VGA interface that needs to connect only the large screen color TV with the coaxial RCA input to the computer and other devices. The solution is to configure the interface converter. The circuit has two different interfaces between two different interfaces. . In the figure, the VGA interface output R, B, and G three primary colors are coupled to the RCA output port by C1C2, C3C4, and C5C6 circuits, respectively. At the same time, coupling capacitors are separated from DC components from video cards. The ICA, ICB is oriene (74HC86) will be synthesized, and the field synchronous signal synthesis composite synchronization signal is output to the Synchronous signal phase conversion circuit of the DOS composed of the S1 bidirection switch and the field effect tube T1. Since the composite synchronization signal and the green chromophone signal can cause the display screen brightness, it can slightly reduce the resistance of R2 to reduce the brightness, and appropriately adjust the resistance of R1, R3, so that the tricho is balanced, but attention Do not cause overheating of video card overload. The input voltage of the power supply regulator IC2 cannot be less than 9V to ensure that the converter maintains a constant 5V operating voltage and 30 mA operating current. D2 is a DC power polar reverse protection diode. The board is loaded into the shielded shield of the metal housing ground. Interference with anti-other electromagnetic fields. Author: Lin Xinxiong

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