The discussion centers on designing a PIR motion sensor utilizing a BC-547 transistor for amplification. Participants confirm that using ordinary class-A amplifiers is appropriate for amplifying the sensor's output to the alarm circuit. The low-power nature of the application supports the use of class-A amplifier topology, making it a suitable choice for this project.
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suryakalpo said:I'm planning to design a PIR motion sensor. I wanted to know if I can use ordinary class-A amplifiers to amplify the output of the sensor which will be given to the alarm circuit. The transistor I'm planning to use is BC-547