Light Sensors
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Light Sensors

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Component Technical Specifications

Light Sensor Modules (specifically LDR or Photoresistor modules) are essential for projects that need to respond to changes in ambient light. These modules typically use a Cadmium Sulfide (CdS) cell to detect light intensity and are widely used in automatic street lighting, solar trackers, and security alarms.

Operating Voltage3.3V to 5V DC, making it compatible with most development boards.
Output SignalDigital TTL (High/Low) and Analog (Voltage proportional to light).
Comparator ICIndustry-standard LM393 for clean, stable digital switching.
Sensitivity AdjustmentBuilt-in multi-turn potentiometer for precise threshold tuning.
Response TimeTypically 20ms to 30ms, sufficient for most automation tasks.
Spectral PeakApproximately 540nm, which closely mirrors the sensitivity of the human eye.

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