1 / 8

Decibel Level Detector Project Chris Lombardo IME 458

Decibel Level Detector Project Chris Lombardo IME 458. Objective. Produce a decibel level detector with a range of 0-50 decibels Use a LM3915 integrated chip to drive a series of ten groups of LEDs. Circuit Diagram. BOM. Project Description.

verdad
Download Presentation

Decibel Level Detector Project Chris Lombardo IME 458

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Decibel Level Detector Project Chris Lombardo IME 458

  2. Objective • Produce a decibel level detector with a range of 0-50 decibels • Use a LM3915 integrated chip to drive a series of ten groups of LEDs

  3. Circuit Diagram

  4. BOM

  5. Project Description • Omnidirectional electret microphone serving as the input • Two amplifiers with the first amplifying the signal and the second serving as a rectifier driver • The Q2 transistor charges capacitor C8 and then discharges it across R13 to make a peak detector

  6. Description Continued • The Q3 transistor changes the sensitivity of the LM3915 chip giving the system an extra 20db of range • The main component of the system is the LM3915 itself which controls the currents through the LEDs while also measuring the input voltage line SIG logarithmically with a range of 0-50db

  7. Conclusion After completing this project I have a fully functioning sound level reader with a range between 0-50db with steps of roughly 5db between each LED Overall success but a board with dual LM3915s would be more useful.

More Related