Hi everyone,
I need ur help to build a circuit for my project.
I just want to transmit data using infra red (in range up to 20 cm), but i dont know how to make the circuit. I dont matter bout the carrier frequency.. (usually 38 kHz or the other). I still using the Altera DE2 Board, 5mm infrared transmitting LED, and 5mm Infrared Phototransistor
The problems are :
1. How can I modulate data with the carrier frequency?
2. How can I demodulate? I think after photo transistor receives data, it must be demodulated before it fed to the microcontroller. Pls give me the demodulator circuit.
3. What should i do for the DE2 board( any program?)
4. Finally how do i transmitting ASCII characters?
I have found the similar project in this link : Simple infrared data communications
But I don't understand about PIC microcontroller.
I hope someone could give me the complete circuit (IR transmitter and IR receiver), using DE2 board A.S.A.P.
Thx b4.
I need ur help to build a circuit for my project.
I just want to transmit data using infra red (in range up to 20 cm), but i dont know how to make the circuit. I dont matter bout the carrier frequency.. (usually 38 kHz or the other). I still using the Altera DE2 Board, 5mm infrared transmitting LED, and 5mm Infrared Phototransistor
The problems are :
1. How can I modulate data with the carrier frequency?
2. How can I demodulate? I think after photo transistor receives data, it must be demodulated before it fed to the microcontroller. Pls give me the demodulator circuit.
3. What should i do for the DE2 board( any program?)
4. Finally how do i transmitting ASCII characters?
I have found the similar project in this link : Simple infrared data communications
But I don't understand about PIC microcontroller.
I hope someone could give me the complete circuit (IR transmitter and IR receiver), using DE2 board A.S.A.P.
Thx b4.