George timmermans
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Traffic light VU meter for in the classroom

I designed and build this because my financé kept telling me how difficult it is to keep the noise levels down in a classroom fol of children. So I wanted to see if the kids had a visual indicator that the noise exceeded acceptable levels they would self regulate the noise they make. And if not it would give me a fun project to build anyway. I wanted to make it aesthetically pleasing and after a little bit of research decided to make it look like a traffic light. It's a basic design and easy to make with some basic tools and a 3d printer.

The functionality is very similar to that of a VU meter. It uses a microphone to listen to the ambient audio and when it surpasses a particular threshold it will light either the yellow or red LED. A slight delay will prevent it from jumping around too much and causing a distraction. Two potentiometers allow you to adjust the sensitivity of the microphone and the delay how long a LED should stay on for. The construction is fairly basic.

Components: 
  • Arduino Uno
  • 12V/5V 2A USB to IDE/SATA Power Supply Adaptor
  • Arduino four channel mosfet module
  • 2x Potentiometer
  • Arduino microphone module
  • Arduino protoshield
  • 3x COB LED (RYG) (12vdc)
  • Wine bottle case
trafficlight_3d_files.zip
File Size: 2539 kb
File Type: zip
Download File

traffic_lightv2.zip
File Size: 1 kb
File Type: zip
Download File

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  • About Me
    • Resume
    • Press releases
  • Blog
  • Projects
    • Long Range WiFi Link
    • Embedded Systems >
      • Photo Booth
      • Classroom VU meter
      • USB Media Controller
      • Weather Station
      • Arduino Swimming Pool Controller
      • GRBL Android Controller
      • Arduino Serial Driver
      • Arduino Multitasking
      • 8x8x8 LED Cube
      • Analog -> Digital Geiger Counter
    • 3D Printing >
      • Simplify3d Configuration
      • 3D print repairs
    • Home Brewing >
      • Mead Recipes >
        • Cinnamon Mead
        • Sweet Chili Mead
        • Lemon & Ginger Mead
        • Mead Liqueur
        • Honey Beer
      • Glühwein (Spiced Wine)
      • Limoncello
    • House
    • Toolmaking
    • Laser Cutting
  • Weather Cam
  • Contact