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Sound Meter Kit

7.92
Exclusive to Kitronik
Teaching Notes
Key Stage 4
This project uses a microphone to measure the sound level and then displays the amount of sound by lighting more LEDs the louder it is.

Availability: In Stock.

Code1+ 5+ 50+
2142£7.92
(£9.504 incl VAT)
£5.80
(£6.96 incl VAT)
£5.50
(£6.60 incl VAT)
OR

This project kit uses a microphone to measure the sound level and then displays the amount of sound by lighting more LEDs the louder it is. There is an adjustment to set the sensitivity and the output is displayed on 10 LEDs.

The circuit uses an LM386 audio amplifier IC to amplify the signal from the microphone, then the LEDs are driven by an LM3914 dot / bar display driver.

Features:

  • When built the kit measures sound and displays the level accross LED's.
  • Sound sentivity is adjustable.

Contents:

Dimensions:

  • PCB Length: 91mm.
  • PCB Width: 46mm.

Requires:

Resources:

Note:

  • This kit requires soldering.

Free samples:

Teachers can order a sample of this kit (one per school) here. You will need to select the kit from a list of all the sample kits; the stock code for this kit is 2142.
Note: this service is only offered to schools for evaluation purposes only.

Buy British:

 This kit is designed and manufactured in the UK by Kitronik.

Physical characteristics:

  • PCB Length: 91mm.
  • PCB Width: 46mm.
  • PCB Component Count: 24.

Electrical characteristics:

  • Voltage Nominal: 9V.
  • Voltage Range: 3V - 12V.
  • Standby Current: 26.6mA.
  • Current Max at Nominal Voltage: 133mA.
potential-divider-voltage-divider-whiteboard-150
How A Potential Divider / Voltage Divider Works
A guide to understanding how a Potential Divider / Voltage Divider works. What is a Potential Divider / Voltage Divider? This is a simple circuit which takes advantage of the way voltages drop across resistors in series.

Questions:

Posted by Adam Cooke, Friday, 19 September 2014 on product Sound Meter Kit

Question:

Hello, If I wanted to use an AUX input could I replace the microphone directly or would the circuit change?

Answers:

  • Posted by Aaron Sturman on Friday, 19 September 2014
    The amplification on the PCB has been calibrated for the microphone. Depending on your AUX signal it may be too high or low. It might work alright but I couldn't promise it.

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