Circuit Diagram for lights in a building (Sound/Light Sensor + Delay)

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SUMMARY

The discussion focuses on designing a circuit diagram for a lamp that activates based on sound detection and light conditions. The system utilizes a light sensor that allows current flow in darkness, a sound sensor connected to an inverter, and a delay mechanism set for 10 seconds. Both sensors are integrated through an AND gate, ensuring that the lamp only turns on when sound is detected and it is dark. Modifications to eliminate initial delays in activation were also discussed, suggesting the use of an OR gate to streamline the circuit's response.

PREREQUISITES
  • Understanding of basic electronic components: light sensors, sound sensors, and inverters.
  • Knowledge of digital logic gates: AND gates and OR gates.
  • Familiarity with delay circuits and their applications in electronic systems.
  • Basic principles of circuit design and flow of current.
NEXT STEPS
  • Research the operation and applications of sound sensors in automation systems.
  • Learn about integrating multiple sensors using logic gates in circuit design.
  • Explore delay circuit configurations and their impact on system responsiveness.
  • Study the principles of light sensors and their role in smart lighting solutions.
USEFUL FOR

Electronics enthusiasts, circuit designers, and students working on automation projects involving sound and light detection systems.

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Homework Statement


Need to design a system where the lamp (output) turns on when sound is heard and turns off after 10 seconds of no sound, but it must also be dark (light sensor).

Homework Equations


The Attempt at a Solution


I have put a Light Sensor (that is set to let current flow when it is dark). Then i have a sound sensor, connected to an inverter, which is connected to a delay (set to 10 seconds). These are both connected to the light (lamp) through an 'AND' gate so that both must be allowing current to flow for the light to turn on.

When turning the light on there is a delay, (the question didn't say that having a delay at the start isn't correct, but if someone could tell me how to modify it so that that doesn't occur, it would be appreciated)
 
Last edited:
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the output of the delay and the output of the inverter should connected to an OR gate. The output of the OR gate goes into the AND gate.

Delay:
output=OR gate
input=inverter

OR Gate:
output=AND gate
inputs=inverter,delay

AND Gate:
output=lamp
inputs=Or gate,light sensor.

make sense?
 

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