COLOURS SENSOR DETECTOR CIRCUIT SCHEMATIC DIAGRAM

COLOURS SENSOR DETECTOR CIRCUIT SCHEMATIC DIAGRAM

This circuit can sense eight colours, i.e. blue, green and red (primary colours); magenta, yellow and cyan (secondary colours); and black and white. The circuit is based on the fundamentals of optics and digital electronics. The object whose colour is required to be detected should be placed in front of the system.

Note:

    * Potmeters VR1, VR2 and VR3 may be used to adjust the sensitivity of the LDRs.
    * Common ends of the LDRs should be connected to positive supply.
    * Use good quality light filters.