This example shows how to use the tone() command to play different notes on multiple outputs.
The tone() command works by taking over one of the Atmega's internal timers, setting it to the frequency you want, and using the timer to pulse an output pin. Since it's only using one timer, you can only play one note at a time. You can, however, play notes on different pins, sequentially. To do this, you need to turn the timer off for one pin before moving on to the next.
Thanks to Greg Borenstein for clarifying this.
Step 1: What You Need?
1 x Arduino Board (Arduino UNO used in this tutorial)3 x 8 Ohm Speaker
3 x 100 Ohm Resistor
Don't have components? Don't worry. Just click the component's name.
Step 2: Build Your Circuit.
Step 3: Upload The Code.
1. Select the Arduino board type: Select Tools >> Board >> Select your correct Arduino board used.
2. Find the port number by accessing device manager on Windows. See the section Port (COM&LPT) and look for an open port named "Arduino Uno (COMxx)". If you are using a different board, you will find a name accordingly. What matters is the xx in COMxx part. In my case, it's COM3. So my port number is 3.
Select the right port: Tools >> Port >> Select the port number.
3. You can find this code in the example of Arduino IDE.
Select File >> Examples >> 02.Digital >> toneMultiple
Click press the "upload" button (see the button with right arrow mark).
The sketch below plays a tone on each of the speakers in sequence, turning off the previous speaker first. Note that the duration of each tone is the same as the delay that follows it.
My Robot Education Sdn. Bhd. (Robotedu.my) was founded in 2015 as the first robotics education centre in Malaysia to provide Arduino-based robotics courses for youths. Our vision is to be able to provide robotics education to every youth in Malaysia.
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