Project Four – Noise Maker

Introduction

The purpose of this sketch is to use the piezo buzzer to make a beeping noise. The potentiometer is used again as an analog input to vary the delay time. As you adjust the potentiometer, the speed of the beeps will change. The picture is incorrect - you need to Connect the Potentiometer to the Analog A0/A1 input jack, like it was in Project 3. The Potentiometer produces an analog voltage on its D1 output, which is connected to Arduino A0 analog input on the A0/A1 input jack. Connect the Buzzer to the D6/D7 Digital I/O Jack. The sketch uses Arduino Pin D6 to send power to the Buzzer on its D1 input.

Now upload the following Arduino sketch:

// Project Four - Noise maker
//

void setup()
{
  pinMode(6, OUTPUT);
}

void loop()
{
  digitalWrite(6, HIGH);
  delay(analogRead(0));
  digitalWrite(6, LOW);
  delay(analogRead(0));
}

As you can see, the piezo can be used as another form of digital output. When using this Grove unit, don’t forget to set the output pin connected to the Grove back to LOW when you want the sound to turn off.

Help us make it better

Thank you for choosing Seeed. A couple of months ago we initiated a project to improve our documentation system. What you are looking at now is the first edition of the new documentation system. Comparing to the old one, here is the progresses that we made:

  • Replaced the old documentation system with a new one that was developed from Mkdocs, a more widely used and cooler tool to develop documentation system.
  • Integrated the documentation system with our official website, now you can go to Bazaar and other section like Forum and Community more conveniently.
  • Reviewed and rewrote documents for hundreds of products for the system’s first edition, and will continue migrate documents from old wiki to the new one.

An easy-to-use instruction is as important as the product itself. We are expecting this new system will improve your experience when using Seeed’s products. However since this is the first edition, there are still many things need to improve, if you have any suggestions or findings, you are most welcome to submit the amended version as our contributor or give us suggestions in the survey below, Please don’t forget to leave your email address so that we can reply.

Happy hacking