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Audio Indicator ( LM741)

2016-01-05 02:10  
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This article briefly describes the Audio Indicator (LM741). This principle is easy to understand, but also very practical. Depth understanding of circuit elements, can be more effective to grasp this principle. Do you know the circuit, for example, can understand and buy these components: LM741 .

This circuit can be used to remotely monitor a loudspeaker, alarm, or audio source for presence of an audio waveform. It can also be directly connected across loudspeaker terminals used as a peak indicator. If you need to monitor some audio signal at a location that is either soundproof are too far away to actually hear the signal then you can use a circuit similar to this one. A remote indication that the audio source is active is provided visually, here in the form of aLED. Referring to the above circuit, the 10k preset is a level control which should be adjusted so that when the source ( audio signal or alarm ) is producing the desired amount of noise, theLEDlights. The input stage is an inverting x100 amplifier made with a 741 op-amp.

Circuit diagram:

Figure:1 Audio Indicator Circuit Diagram Using LM741

Figure 1 Audio Indicator Circuit Diagram Using LM741



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