3. Automatic Night Lighting Control

Design a combinational logic circuit for an automatic street lighting system. The system monitors an ambient light sensor that outputs a logic high (1) during daylight hours. The street light must activate (assert high) automatically only when it is dark (i.e., when the sensor output is logic low).

Constraints

  • You must utilize exactly one input source: Ambient Light Sensor.
  • The light output must trigger (high) only when the sensor input is low.
  • To adhere to system architecture requirements, the control logic must be synthesized using a restricted set of primitive logic components. You are strictly forbidden from using standard NOT gate components.

Behavioral Reference

Ambient Light SensorStreet Light Output
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