* The song is played on the speaker connected to pin 3 and GND. * This program will play the theme song of the Malayalam movie You can modify those and create any song according to your wish!Ĭonnecting the Arduino, Speaker, and Power Connect a speaker or a piezo buzzer to the Arduino with one wire to the Digital pin 3 and the other one to the ground of the Arduino. The note and its corresponding duration is what is there in melody and noteDurations respectively. Higher value gives longer duration notes. Here 8 = quarter note, 4 = 8th note, etc. Then I wrote noteDurations according to the length of each music note. I wrote down the musical notes of this song first and then wrote the melody array with that. I found out the notes of this song with my guitar. The first array contains the notes and the second array contains its corresponding durations. It is similar to how ringtones were written in old Nokia cell phones. How I made melody and noteDurations of this song: If you take a look at the program, you can find two int arrays: melody and noteDurations. You may find it useful whenever you want to make musical notes for your Arduino speaker. This note table was originally written by Brett Hagman, on whose work the tone() command was based. So instead of writing the frequency in the tone( ) function, we’ll just have to write the name of the note. This file contains all the pitch values for typical notes. The code below uses an extra file, pitches.h. Pin: the pin on which to generate the toneįrequency: the frequency of the tone in hertz - unsigned intĭuration: the duration of the tone in milliseconds (optional) - unsigned long The Arduino pin can be connected to a piezo buzzer or other speakers to play the tones. Otherwise, the wave continues until a call to noTone (). It g enerates a square wave of the specified frequency (and 50% duty cycle) on a pin. This periodicity in power is preventing the other analog sensors from giving reliable readings while the Arduino is outputting a tone.The program creates tones with a function, ‘tone( )’. Using the first circuit (speaker and R1 in series) gave a larger periodicity in power for smaller values of R1 and a higher speaker volume. This also affects the +5V power supply pins (not pictured) and happened for all of the circuit configurations described above. However, when the tone is playing, there is a frequency to the Vin! (pictured in my response below, because new users can only put 1 multimedia item in a post). When i looked at Vin on the oscilloscope without a tone playing, it displays a constant voltage of approximately 12V, as expected (see response for photo). When the tone is playing, i noticed that the other sensors (whose values i'm printing to a screen) started to get noisy. Those sensors are powered by Vin (not 5V!), which, in this case, i have set to 12V (powering the arduino with a wall wart). I'm using some other sensors as analog inputs to the arduino. In the second circuit, designed to amplify the volume out of the speaker, R2 = 440 Ohms and the transistor is this (its just what i could quickly find for free). However, the volume was not nearly loud enough, so i tried the second circuit. In the first circuit i have tried R1 ranging from 100 Ohms to 440 Ohms.
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