This diagram illustrates how an Analog-to-Digital Converter (ADC) responds to changes in light intensity using an LDR (Light Dependent Resistor). The resistance of the LDR varies with the amount of incident light—decreasing in bright light and increasing in darkness. This change in resistance produces a varying voltage, which is fed to the ADC. The ADC then converts this analog voltage into a digital output. As light intensity changes, the ADC output varies accordingly, enabling digital systems