Simple electronic keyboard design design content:
1. Use a matrix keyboard to represent the keys, which can play at least 8 notes, namely: notes 1.23.4.,5,6,
2. The length of time the key is pressed represents the length of the beat, and a buzzer is used The instrument emits sound
3. The digital tube displays the current note
4. The volume is adjustable
(The code and its project files are placed at the end)
The circuit diagram is as follows:
The 51 microcontroller electronic keyboard is an electronic keyboard based on the 51 microcontroller (AT89C51, AT89S51, etc.). Its principle is basically the same as that of an ordinary electronic keyboard, but it uses a 51 microcontroller to implement control and audio processing functions.
The specific principles are as follows:
1. Keyboard input: Through the matrix keyboard connected to the 51 microcontroller, the key signals are converted into digital signals and input into the microcontroller. Scan the keyboard to detect changes in key state.
2. Digital signal processing: By processing the digital signal input from the keyboard, it determines which key is pressed and the state of the key (pressed/released), and simultaneously converts it into the corresponding frequency and note.
3. Digital synthesis: Use the built-in timer/counter module of the microcontroller to convert the input frequency information into a pulse signal. These pulse signals can produce sounds of different pitches after certain calculations and processing.
4. Digital audio output: Output the synthesized digital audio signal to the buzzer, where the NPN transistor is used for current amplification, because the pin current of the microcontroller is too small to drive the buzzer to work properly.
Generally speaking, the 51 microcontroller electronic keyboard uses the computing and control capabilities of the microcontroller to convert keyboard input into audio output, produce different tones and effects through digital synthesis and processing, and realize control of key performance and other functions.
Significance of the topic:
As a project, the 51 single-chip electronic keyboard has the following significance:
1. Practical application ability: By designing and producing the 51 microcontroller electronic keyboard, students can apply the electronic technology knowledge they have learned to actual projects. They need to understand and master the principles of microcontrollers, digital synthesis technology, signal processing and other related concepts and technologies, and apply them to the design and implementation process of electronic keyboards.
2. Improve programming skills: In the process of making the 51 microcontroller electronic keyboard, students need to write microcontroller programs to realize functions such as key input detection, audio synthesis and control. This can help them improve their embedded system programming skills and become familiar with the microcontroller programming language and development environment.
3. Enhance innovation ability: In the process of designing and making the 51 microcontroller electronic keyboard, students can think innovatively and try to improve and optimize the functions and performance of the electronic keyboard. They can try to introduce new sound effects, rhythm control, recording functions, etc., as well as design electronic keyboard shells of different styles and structures, etc., so as to cultivate innovative consciousness and ability.
4. Comprehensive ability development: The production of 51 microcontroller electronic keyboard requires students to comprehensively apply electronic technology, computer programming, signal processing and audio-related knowledge, as well as hands-on ability and teamwork ability. Through this subject, students can comprehensively exercise and improve their comprehensive abilities.
In general, the 51 MCU electronic keyboard as a subject can help students apply theoretical knowledge to actual projects, improve their practical ability, programming skills and innovation ability, while cultivating their comprehensive ability and teamwork spirit.
Prospects
The 51 microcontroller electronic keyboard has good development prospects in different aspects:
1. Education market: 51 microcontroller electronic keyboard can be used as a teaching tool and has broad application prospects in the field of education. It can help students understand the principles of electronic technology and embedded systems and improve programming and innovation abilities. Therefore, there is a demand in educational institutions such as schools and training institutions.
2. Entertainment market: As a musical instrument, the electronic keyboard has always been loved by music lovers. The 51 microcontroller electronic keyboard can provide a variety of music effects and functions, such as different timbres, chords and rhythm control. These features can meet the needs of music lovers and create more possibilities for music creation and performance.
3. Maker market: In recent years, maker culture has flourished, and more and more people have become interested in DIY electronic products. The 51 microcontroller electronic keyboard is a project that is very suitable for makers, who can design and make their own electronic keyboard through their own creation and improvement. This also provides potential business opportunities for the maker market.
4. Innovative applications: 51 microcontroller electronic keyboard can be the starting point of an innovative project. It combines music and electronic technology and has rich potential for innovative applications. For example, sensor technology can be combined to achieve posture control and play piano sounds through gestures; or the electronic keyboard can be interconnected with other electronic devices (such as smartphones) to achieve more interactions and functional expansion.
In general, the 51 microcontroller electronic keyboard has broad development prospects in education, entertainment, maker and innovative applications. As people's demand for music and electronic technology increases, and the maker culture rises, the 51 MCU electronic keyboard will have more opportunities and potential to be developed and promoted.
project:
https://download.csdn.net/download/guangali/88291598?spm=1001.2014.3001.5501