Fire Alarm With Sensor LDR

Tuesday, March 16th, 2021 - Electronic Hobby

Fire alarms can be made ​​with a light sensor (LDR) as in the article with the title of Fire Alarm with Sensor LDR. Principles of fire detection Fire Alarm with LDR sensor is to detect the presence of smoke through the LDR. Fire Alarm LDR in the circuit does not stand alone in detecting a fire, but the LDR in the pair with lights shining on the LDR. So that when the detected smoke from the fire then the intensity of light received by the LDR. LDR reduced and eventually triggering the alarm system at Fire Alarm with Sensor circuit this LDR. Parts in the series of Fire Alarm with Sensor LDR are some of the sensors, tone generator, audio power.

Image Series Fire Alarm With Sensor LDR

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The function of Fire Alarm With Sensor LDR

  • LDR and sensor parts of the face to light a fire smoke detection
  • Part trigger using transistors and regulators as a trigger tone generator 7805
  • Tone generator section with IC UM66
  • Power audio section uses an audio power IC TDA 2002 which is equipped with voleme control (R3)

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