Atmel AVR
Projects
www.ustr.net
SinePlayer
PLEASE
READ 
The projects below were developed within USTR and are here published only
for instructional purposes.
USTR is not responsible for its use or consequencies of it.
If you are planning to use some of the following projects or part of it,
please comment on your project that you copied part of entirely from the website
www.ustr.net.,
If you are planning to use for commercial purposes or financial gain,
you must contact us and get our approval, you may be prossecuted if you
do otherwise.
Please do not copy the projects to your website, it is not allowed, instead
post a link to this page.
|
Project
|
Type
of Microcontroller
|
Publishing
Date
|
Description
|
|
Sine
Tone Player
|
AVR
AtTiny13 / Tiny15 / Tiny26
|
December
29 2006
|
This
small project demonstrate the Tiny family high speed PWM capabilities
to produce a sinewave output. It was also incorporated
functions to play Piano Key Tones using sinewave waveform, as
a smooth and clean sound as the ones produced by cords.
The
sinewaves produces are better in low frequencies. The high frequency
keys need to jump over a larger byte quantity in the sine table,
to be able to produce the correct frequency, it generates a
high frequency component over the sinewave, and it may be noticeable
on the sound speaker. Anyway, it is not a HI-FI system.....
The sinewave.asm includes 2 Christmas Songs.
|
Download:
sinewave.asm
/ sinewave.hex
Connection
Diagram:
In
the above drawing, SPI Interface pins are identified for chip programming.
Output
Audio Waveforms
Wagner
Lipnharski - UST Research Inc - December 2006