Arduino Tone Generator is a set of switches sharing a common terminal to GND while the remaining pins are connected to 2, 3, 4, 5, 6, 7, 8, and 9 Arduino digital pins and with a speaker also installed between GND and digital pin 11 from Arduino Uno complete this interesting project. For uploading the code, go to at: http://pastebin.com/k3PcyWZ9

Step 1: Bill of Materials

What you will need:

1 Arduino Uno

1 UBB-A to USB-B cable

1 PCB for installing the awitches

8 Switch Push Button Tactile (4-PIN)

1 8 Ohm Speaker

10 Wire jumper male to female for Arduino

1 #22 copper wire (1ft)

1 Heat Shrink Tube( 1 ft)

1 40-pin array for arduino

1 Solder station

1 Solder roll

Step 2: Schematic

You only have to follow step by step what your diagram shows. Note that you have a set of switches to be connected to its respective Digital Arduino pin from 2 to 9 while a speaker shares the common GND with the remaining terminal of each switch by remembering that the remaining terminal of your speaker should be connected to Digital Arduino pin 11.

Step 3: Installing the Switches

Install the switches on the PCB provided for it. For this, you can use glue under the body switch and later solder its terminals by checking the common terminals for solder them in the same row. You can also use a multimeter for testing continuity.

Step 4: Preparing the Speaker

In this step, you are going to solder two wires to your speaker so that once you have soldered them, also introduced them into a 1/4" Heat Schrink Tube previously cut and so you can manipulate the speaker when you are working with the project completed.