The main concept behind Voice controlled wireless Electronic notice board using a rolling display is to show scrolling messages and to control them by using our own voice. We have already seen GSM based Electronic Notice board, however, speech controlled Notice board has the additional advantage of the ease of use. The user has to give voice commands in his/her own voice to control the scrolling messages displayed on the electronic notice board.
Voice recognition is done in the Android application. The user has to install this Android application on his/her smartphone or tablet. Then the user has to give voice commands to this android app. The android app then passes these commands to the microcontroller using wireless communication. It means the user doesn’t have to go near the Electronic notice board to change the scrolling message. The wireless communication technique used in this project is Bluetooth technology.
Messages to be displayed are stored in Electrically Erasable Programmable Read-Only Memory. EEPROM memory holds data even after the circuit is reset. The microcontroller receives these commands with the help of a Bluetooth receiver and decoder. Then it passes these commands to the Rolling display which is made up of Matrix LEDs.
Authentication of the electronic notice board
What if anyone connects to the Bluetooth device and can control the message on the Notice board using an Android application?
Answer: The owner of the Voice-controlled Electronic Notice board should not disclose the password or 4-digit pin required to connect the Bluetooth device to the Android application. Another alternative or we can say the future scope of this project is User should send a password first and then the actual message to be displayed on the “Rolling display”.
The dimension of the rolling display is 376mm by 72 mm
The complete Rolling display is made up of 6 blocks of individual matrix LEDs. A single matrix display is made up of 8 by 8 LEDs. It means 8 rows and 8 columns of LED which makes it 64 LEDs in one block. So in total, there are 48 columns and 8 rows of LEDs. All LEDs are Red in color.
Various important blocks of the system are:
There are many Applications of Electronic Notice Board Control By Human Voice, a few of them are listed below:
Voice-Controlled Devices for Smart homes are in huge demand. We can add a few of the below features to this project to make it future-ready.
You will get the following documents with this project:
Question: What is the range of wireless communication for rolling displays?
Answer: Range depends on Bluetooth device, generally Bluetooth device has a 10-meter range.
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hello good day. I would like to purchase this project and I am from Southeast asia. I just want to know how many words or combination that this project can recognize or process? Is there any limitation?please reply
Android application will be specifie?? N can we replace Bluetooth or any other alternative to increase the range of Bluetooth...n coding for pic microcontroler is necessary?? Can u do this requirements... Please reply
There is no specific android app. You can use any other available, but you need to change microcontroller program accordingly. We can replace bluetooth by Zigbee (XBee). Also, we can replace 8051 by PIC.
Can we display message in writing and voice both using through android??🤔🤔
for long distance communication can we use gsm instead of bluetooth
Hi Rajitha, we have already used GSM modules in place of Bluetooth for long distance communication.
If multiple persons want to use the single display at a time ,which person's commands it will.
This project has BlueTooth receiver, and it connects to only 1 smartphone at a time. So command can be given only from 1 smartphone at a time. If 2 person wants to use this project then they have to do it one after the other.
How many characters can it display
To display more characters what we should do