In this activity, we will program evive’s buzzer in such a way that every time the ball touches Tobi, our friendly neighborhood coding bear, the buzzer will generate a sound. Playing tone using touch pins in Scratch mode. This block can be used in Upload Mode as well as in Scratch Mode. There is an inbuilt buzzer in evive connected to digital pin 46. Also, the user can input the specific frequency and duration (in milliseconds). The note and the beat can be selected from the drop-down menu. When it is executed it plays the tone of a specified frequency/note for a specific duration/beat. Play tone on () of note () & beat () block is used to play sound on the evive buzzer. but we still need to return a value, so return 0. Return(0) // We looked through everything and didn't find it, Return(frequencies) // Yes! Return the frequency we find it, we'll return the frequency for that note.įor (i = 0 i < numNotes i++) // Step through the notes Now we'll search through the letters in the array, and if Don't forget that the rests (spaces) need a length as well. A "1" represents a quarter-note, 2 a half-note, etc. Beats is an array of values for each note and rest. A space represents a rest (no tone)Ĭhar notes = "cdfda ag cdfdg gf " // a space represents a rest Notes is an array of text characters corresponding to the notes Length must equal the total number of notes and spaces change these values to make different songs! We'll set up an array with the notes we want to play We'll provide a function that takes in note characters (a-g),Īnd returns the corresponding frequency from this table: The Arduino's tone() command will play notes of a given frequency. To illustrate the use of the piezo buzzer please see the following code: /* ![]() } Example 2: Playing a song of a specific length put your main code here, to run repeatedly: Tone(buzzerPin, baseFrequency, 1000) //this function plays sound of given frequency on buzzer. put your setup code here, to run once:įor (baseFrequency = 62 baseFrequency < maxFrequency baseFrequency += 100) The evive's tone() command will play notes of a given frequency.
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