Asking help for my final year project

[jcwc84]

Since it's my first post, I'm not sure whether i post in correct section or not.

If it isn't correct, then help me move to correct section.

I also need to clarify that my English very poor. Very Happy

K, i will brieftly explain my project description.

I want to modify Morse code transmitting system by replace the electric telegraph with CPU. So there's two CPU, one at transmitting and another at receiver side.

So i need to write a Morse code encoder programming on the transmit side, and another Morse code decoder programming on the receiver side.

About the program, i plan to use visual basic to write it out, with we can type what we want in a box, then press PLAY and it will find sound clip for every word, and when i press SEND, it will send the data to transmitter circuit. Next to receiver circuit and go in CPU again for decoding program.

The problem is i had no idea to integrate the circuit and the programming software. I have no idea how it works.

For the transmitter circuit, it need to have SERIAL PORT use to connect to CPU. But i'm not sure how's the circuit's design. I only search for circuit which used infrared but it only limited for short distance. I need a transmitter and receiver which can transmit and receive within 2 to 10 meter. Anyone of u know any circuit like? I need to know what components i need.

If there's any words which confuse you/doesn't clear for u, u may ask and i will answer after check this post often as i could.

I really need ur comments, suggestion and help Smile

 

[tomic]

Hi,

For the RF architecture, I'd propose you to go with the nRF24L01 TRANSCEIVER from Nordic VLSI. Easy to integrate with a low cost MCU that you can also use with a level shifter for your RS232 interfacing. Then the programming with VB.NET shouldn't be an issue.

For your PCB prototypes, try http://www.tom-ic.com/index.php?cPath=22.

For your components hunting, just try our BOM service **broken link removed**

Hope this helps,

Tomic

------------------<0>-<0>------------------
www.tom-ic.com
Your reliable prototyping partner.

 

[jcwc84]

thank you tomic. i also wanna ask that is it any other device like blue tooth can replace for the circuit?

 

[tomic]

Well, sure you can use a BT module but it won't serve your need better in term of price, power consumption and footrpint complexity.
The nRF24L01 chip is really a piece of cake to program through the SPI interface and programming a PIC in C is not that a big issue.

Maybe you could be more precise with the specs? Reading range, datarate, etc...

For your PCB prototypes, try http://www.tom-ic.com/index.php?cPath=22.

For your components hunting, just try our BOM service **broken link removed**

Hope this helps,

Tomic

------------------<0>-<0>------------------
www.tom-ic.com
Your reliable prototyping partner.