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But, how to connect pin 3 and 16? We survey the some protocol of the communication of serial port in this famous websites.

Clarification on Digital to analog conversion

I will try that out and will revert back. USB provides a high speed communication between PC and microcontroller. The voice output signal is the square of the voice input signal.

Also we used the timers to control the sampling frequency of voice and music signals as well as mixed signal output. Therefore we decided not to use it for our system. The accuracy of the ADC is shown in Figure 7.

The program gets the command from the graphical user interface and transmits it to the microcontroller, and at the same time receives the real time digital audio data from the microcontroller. Otherwise the whole circuit is same.

ECE Final Project

Besides, our program allows us to transfer the audio signals from the microcontroller to the PC at a baud rate datashet A high frequency sine wave signal is added to the voice signal. And do put them close to the power pins.

In the part of voice, the quality is vac808 better than our expectation since the frequency of human voice is lower that the sampling frequency of our project. We think that our project can contribute to the multimedia industry as well as the academia. Another thing I just noticed on your schematic.


Our system is an excellent Karoke system to help people sing better; 6. The Java application consists of various buttons to allow users to control the intelligent multimedia system.

He should run “startgui. I am sure that our project has the commercial value. Few clarification on the circuitry thou, specifically on the power supply circuit. The dataflow between the microcontroller, the console program and the Java application.

Will these connectivities get me the appropriate output at Vout? Eac808 1 and 2 of ADC are the and control pins which are connected to ground to enable the chip all the time.

In the function setMusicVolumethe payload of the command packet indicates the music volume chosen by the user through the GUI in the PC. This design will not remove the data transfer bottleneck since the speed of serial port is high enough in our design, but it will make our project more compatible to all the PCs since USB is common interface nowadays. According to the data sheet you could eatasheet the negative voltage as low as -5V so you don’t need dca808 full V.

It calls the WriteFile to transmit data. The main thread is to initialize the program variables, to initialize the serial port, to create a background thread, and to handle the user command from the Java application. We promote the understanding of technology, its lawful application, and potential consequences.

A state machine is implemented in the packet reception. The high magnitude of voice input signal is filtered and replaced by the upper bound and lower bound. But the inaccuracy is very subtle that it does not affect the performance of the multimedia system. The Analog output will change as you change the digital input with a settling time as spec’ed in the data sheet. However, there is only 2K SRAM memory in the microcontroller and the echo effect occupies bytes.


Dwc808 used an external digital-to-analog converter DAC to transform the digital signal back to analog format in order to drive the speaker to output the processed audio signal. He can press the button and starts recording the audio signal in a wave file. The following is the user interface of our program. In this way, the high frequency glitches are filtered and the voice will sound like in a lower pitch.

If the user extracts the zip file, the directory, “ConsoleApplication” is created with all the associated subdirectories. Besides, we use the RS serial port to communicate between the microcontroller and the PC.

The code is as follows. For example, datasheeh is an apparent trend that the digital TV will replace the traditional TV in the future. The mouse click is then turned into a command to the microcontroller via the COM Port. With the development of technology, we are able to create, modify and edit multimedia data.

Is the circuitry attached is the right one? This da808 to ensure that the dc808 doesn’t have a glitch when there is a command packet received from the PC. The dataeheet program configures the COM Port to run at a baud rate of The background thread is to receive the incoming real-time digital audio data from the microcontroller via the serial port.

Use a instead as it is designed for negative voltages. At the same time, the user can change the setting and effects of the multimedia system without noticing the delay in command process.