The Learning Platform  

With its history,  I  tried to make it as a Learning platform  to learn.  

                 (a)  Intel 8051 Micro Controller Programming in                                      Music—Tone Control and

                       Music reproduction  + Surround  Sound

                 (b)  Hardware Integration

 

I made it. 

 

 wanted to share my dream of having to design a truly digital Tone Control, a dream that never happened during my schooling days,  my experienced and studies of Software / Firmware Programming.   I want to share my little know how in the form of Easy,  Affordable, Fast and Fun ways of Learning, and I wanted to be  Do-It-Yourself, it means,  you learn by yourself.

 

When I presented to several University in the Philippines — I got a common answer,  we too can do this, in fact we have it.   But I am glad that, the DATC as a learning platform was voted by University outside the Philippines.   In fact, it serves it purpose as Learning and Trainer Kit.

 

I presented also to Alexan Commercial with no any response from them.   I though, they would welcome me,  being a person learned a lot from their  magazine Electronic enthusiasts.

 

Well …………………  I guess no one like the DATC!,  opsss!  When I show my work to my close friend during a week end visit,  she volunteer to be the model as shown  below :

What’s on the Learning Platform?

The TDA7442D  cannot work  as standalone.   It need a Micro Controller Unit  (MCU) to tell what to do.  The MCU will command the TDA7442 via I2C.   A firmware developer will need to develop a program to make the Tone control and surround effect to work.

 

Well,  these are the things need to Learn

                 (a)  LCD Displaying

                 (b)  keypressed selecting Volume, Treble, Balance and selecting 4 inputs

                 ‘(c)  control the Tonal  boost and cut for the Treble and Bass  +/- 14 dB

                 (d)  programmable automatic turn on/off

                 (e)  control the MUTE and STANDBY of the Power Amplifier

                 (f)  Remote Control

 

 

Here is an Example.   The DACT have 4 input signal source, they are   :   CD, DVD, MP3 AND AUX.  To select  only one of this input,  the DATC User  need to press  any of the four (4) keays.

Hmmmm, tthey may not like the DATC but I am sure, they will like me.

If the User want a CD,  he should pressed the CD Key, then the DATC will used the CD as input.

 

Now,  the TDA7442D IC cannot do this without a Program that instruct to check the condition of the 4 switches.

 

Let’s take a look at the Schematic Diagram of the Switches as shown below :

The Program is keep checking the status of the Keys :  K2, K3, K4 and K5. 

 

Anyone of this switch is pressed, it means that the user would like to use it as Input.

 

Let’s see the program to make this to happen.

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Last Updated  :   March 2012

 

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