Nov 17, the end of the data sheet. 2 Applications. • Operates With Any 8-Bit µP Processors or as a. Stand-Alone Device. • Interface to Temp Sensors. Category. Description, 8-bit Digital-to-analog Converters. Company, National Semiconductor Corporation. Datasheet, Download DAC datasheet. Cross ref. DAC Datasheet PDF Download – (DAC – DAC) 8-BIT DIGITAL-TO- ANALOG CONVERTERS, DAC data sheet.
|Published (Last):||20 August 2009|
|PDF File Size:||20.51 Mb|
|ePub File Size:||15.54 Mb|
|Price:||Free* [*Free Regsitration Required]|
Another dialog box will pop up to input the wave file to be sent, the user account and password of the sender of the email, the recipient email address, and the message content of the email. The accuracy of the ADC is shown in Figure 7. Our program configures the serial port to run at a baud rate of bps. In this way, the high frequency glitches are filtered and the voice will sound like in a lower pitch. The Java application is stored in the “gui.
Initially both of the signals are in analog format, so we needed two analog-to-digital converters to transform the analog signal into digital format before feeding into the microcontroller.
The application passes the clip filename as a command line argument to the player. The package uses the SMTP protocol to contact the email server and transfers the command and email content. We will run out of time. This project implements a multi-function multimedia system that allows the user to sing with the music video and generate some fancy sound effects. If the object has been acquired by another thread, it waits until the object is released form another thread. If he wants to reset the MCU without re-launching the PC software, he should make sure that the multimedia system has been turned off before.
In this project, we used several popular mathematical models in the field of Audio Signal Processing that help us to simulate specific sound effects. The Java application plays the karoke clip by running the windows media player in a sub-process. Whenever the system receives a command packet from the PC which indicates to set the sampling frequency, the function setSampleFrequency is invoked to handle the rest of the packet payload.
A high frequency sine wave signal is added to the voice signal. The ranges of music and voice volumes are 0 to Since all of our team members are ECE MEng students, Cornell University owns all copyrights and potential, patents related to this project. The following diagram demonstrates the general data flow between the microcontroller, the console program and the Java application.
Besides, we also wanted to integrate this project with a wireless remote control that allows us to control our program anywhere in the effective range. Voice datashewt sounds like a robot voice. However, it will reduce the number of samples the MCU taken to determine the bit value. The reference-to-full-scale current matching of better than g dahasheet LSB eliminates the need for full-scale trims in most applications while the nonlinearities of better than g 0.
Our system is an excellent Karoke system to help people sing better; 6. The console program is stored in the “ConsoleApplication. The Lower Pitch distortion option is done datasneet averaging the past 16 voice signals from our test. Therefore, we chose as the upper bound and as the lower bound datashet the filter.
However, there is not enough internal memory, which is only 2 Kbytes that we decided not to apply this component. Tsimshatsui, Kowloon Hong Kong Tel: In our multimedia system, we implemented a Graphical User Interface written in Java running on eac0801 PC to control the whole embedded system. The code to configure serial fatasheet in the MCU is shown as below: The performance and characteristics of the device are essentially unchanged over the full g 4.
When the user wants to start this multimedia system, he should reset the MCU program first and then launch the PC software application.
Those algorithms that we found are well suitable for our sound effects. However, we found that the sound quality was pretty bad since this approach used PWM mode of the microcontroller to generate an approximate signal and hence the accuracy of signal output was lowered.
In this way, the voice will sound like a patient speaking very softly. The Java Application sleeps for one second after sending the quit command. This is because the DC-offset is not exactly 2. The Gaussian Noise distortion option is done by adding a random signal to the voice signals. The voice and music signals are scaled according to the selected scale before combination. In this project, we use the pre-amplifier circuit of the previous project” Sound Effect Processor “.
The radio buttons selects the kind of distortion, including Patient, Walki-Talki, Robot, Gaussian Noise, and Lower Pitch, to be applied to the voice of the singer. For example, it is an apparent trend that the digital TV will replace the traditional TV in the future. We have tested this setting by the following method: The Op-Amp circuit has a 2.
The use of ports of microcontroller. There are 7 different commands the PC can send to the microcontroller. In recent decades, multimedia becomes quite popular in our daily life. The source code is the complete project created by the version 3.
DAC/DAC/DAC 8-Bit Digital-to-Analog
From the result of our tests, we designed the multimedia system to only allow signal magnitude within 10 of as the DC offset. Performance comparison of basic three type differential amplifiers. These switching points are guaranteed to lie between 0.
The sampling rate of both voice and music is controlled by Timer0. People enjoy the time viewing photos, listening to music, and watching movies.