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PIC HAPPY BIRTHDAY

Using PIC12F629 to generate repeated 'happy birthday to you' tune. The frequencies for the notes are suitable to drive piezo sounder. The IC works down to 2 Volts so it can be powered by 2 cells batteries.
The code
has a data for the 8 notes needed for the tune and it uses 100 bytes, there are more than 680 bytes left to add tunes.
Software includes PIC code (3KB). You are free to use the circuit diagram and the software with no limitations.


Circuit Description
See also Technical Tips

Outputs 3 and 5 are opposite phase to each other to get double the supply voltage.

Power supply can be 2 to 5 Volts.

The optimal speaker is piezo sounder.





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Comments and questions

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02.06.2017 - 20:09
Name: milo
Comment: good

29.12.2016 - 23:33
Name: Giuseppe
Comment: molto utile questo progetto, anche perché il codice è in ASM. GRAZIE

18.06.2016 - 00:54
Name: ADALTO
Comment: MUITO BOM ESTE PROJETO. OBRIGADO AMIGO

16.05.2014 - 22:06
Name: Moty
Comment: Hi Martin. The frequencies are generated by looping for different periods of time before toggling the output. Pic12f629 doesn't posses PWM. If you need more answers let me know whether you are using C or ASM.

16.05.2014 - 14:22
Name: Martin
Comment: Hi, I'm trying to make different tunes but I need different notes for them. How did you convert the notes frequencies into the time constants for the PWM?

20.04.2013 - 22:23
Name: Moty
Comment: Hi Ricardo. I wont be able to fulfil such a request for the following 4 weeks. Try again later if you don't do it yourself by then.

19.04.2013 - 19:38
Name: Ricardo
Comment: Can you please send me by email a version for PIC12F675? Thanks!!

26.01.2013 - 18:31
Name: TOM
Comment: YES THANK YOU ASM OR HEX

26.01.2013 - 18:29
Name: TOM
Comment:

16.01.2013 - 16:51
Name:
Comment: