CGA to SCART Adapter

Posted on Feb 5, 2014

CGA to SCART adapter has great advantages as it does not require separate power source and that uses very few external components, which can be easily adapted in the SCART connector. The signals from R, G and B pins of the CGA`s board are converted from TTL levels to SCART levels with resistors R4, R5 and R6 and entry`s impedance (75 ©) of scart

CGA to SCART Adapter
Click here to download the full size of the above Circuit.

inputs. Output Impedance of voltage dividers thus created is not exactly 75 © as specified for SCART inputs, but in practice the behavior seems to result not big differences. R1-R3 resistors from pin 6 of the CGA`s entrance and pins R, G and B of the SCART connector ensure reduction of 50% of brightness when pin 6 active. From synchronization pulses on horizontal and vertical of CGA board it creates, with the help of R7-R11 ²s and T1, a composite signal timing (SYNC) and a signal remission for TV.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    High Precision Temperature Indicator
    7400 Siren
    System Modeler
    lm12 audio amplifier circuit diagram
    Coil-Less FM Bug
    garden lighting
    A small FM transmitter (SMD)s
    1-Wire Barometer Calibration