| Author |
Message |
asic1984
Joined: 15 Nov 2003
Posts: 266
Helped: 3
|
 05 Jun 2007 5:52 infrared communication ? |
|
|
|
|
hi
i want to connect two mirocontrollers together using infrared ,one circuit will be in a rotating cylinder by a way that it will be always in the same direction of the axis of transmission ,the other circuit will be fixed and connected to the pc with serial port
can u suggest an infrared transmitter/receiver that contains seial port interface or that i can connect it easily with microicontroller
thanks for help
|
|
| Back to top |
|
 |
vijayragavalu
Joined: 29 Aug 2005
Posts: 37
|
|
| Back to top |
|
|
Google
AdSense
|
05 Jun 2007 6:22 Ads |
|
|
|
|
|
|
| Back to top |
|
|
asic1984
Joined: 15 Nov 2003
Posts: 266
Helped: 3
|
05 Jun 2007 6:38 Re: infrared communication ? |
|
|
|
|
hi
thanks too much for your help ,but i donnot wanna use the irda protocol , i will make a simple one ......i just need the led that transmit and that is receiving ...
i will implement any simple protocol between them
do i need just the TFDS4500 diode ?
thanks for help
|
|
| Back to top |
|
|
asic1984
Joined: 15 Nov 2003
Posts: 266
Helped: 3
|
07 Jun 2007 21:38 Re: infrared communication ? |
|
|
|
|
hi
what is the data rate possible of a simple infrared Led ?
thanks for help
|
|
| Back to top |
|
|
dilraj.n
Joined: 02 Feb 2007
Posts: 75
Helped: 7
|
08 Jun 2007 5:06 Re: infrared communication ? |
|
|
|
|
hi
you can use TSOP1738 38 kHz IR receiver for your application
|
|
| Back to top |
|
|
asic1984
Joined: 15 Nov 2003
Posts: 266
Helped: 3
|
11 Jul 2007 16:18 Re: infrared communication ? |
|
|
|
|
hi
is it possible that i connect an infrared led to rs232 transmitter pin on a pic and receive the signal with infrared receiver in another pic in the rs232 receiver pin
thanks for help
|
|
| Back to top |
|
|
asic1984
Joined: 15 Nov 2003
Posts: 266
Helped: 3
|
05 Aug 2007 6:11 Re: infrared communication ? |
|
|
|
|
hi
do i need to connect 555 timer to the trasmitter circuit between the microcontroller(RS232 TX) and the infrared led ?
thanks for help ?
|
|
| Back to top |
|
|
hbaocr
Joined: 13 May 2007
Posts: 247
Helped: 15
Location: Hochiminh City university of technology (VietNam)
|
05 Aug 2007 9:04 infrared communication ? |
|
|
|
|
hi, I think the
U can Use pair of IC transmiter and receive IRDA :
TC9148 ,TC9149.
Or 2248 ,2249
to comunicate with your uC without coding IRDA code
|
|
| Back to top |
|
|
abbas1707
Joined: 03 May 2007
Posts: 230
Helped: 11
|
05 Aug 2007 11:26 Re: infrared communication ? |
|
|
|
|
on the transmitter side the 555 is used to generate square wave of 38khz.but i think if we connect the IR led to microcontroller without 555, we can generate a frequency of
38khz from the microcontroller i.e if using 8051 it can be easily done using timers.
but may be it will be not accurate.
on the receiver side TSOP1738 is commonly used.
|
|
| Back to top |
|
|
asic1984
Joined: 15 Nov 2003
Posts: 266
Helped: 3
|
05 Aug 2007 15:32 Re: infrared communication ? |
|
|
|
|
hi
thanks too much for your reply and help
i will connect the pic (rs232 TX) to the 555 circuit to transmit the data
in the receiver circuit .......i will connect the outpout pin from the IR receiver to the (RS232 RX ) will this work ? ....... i mean the byte i send in the transmitter will be directly read by the receiver circuit ....or is there any thing i should do
thanks
|
|
| Back to top |
|
|
abbas1707
Joined: 03 May 2007
Posts: 230
Helped: 11
|
|
| Back to top |
|
|
aar
Joined: 29 Nov 2007
Posts: 5
Helped: 1
|
18 Dec 2007 8:57 Re: infrared communication ? |
|
|
|
|
hi...
As I know you can't use directly UART serial output of PIC to transmit through IR Tx.
one draw back is the receiver cannot recognizes the baud rate higher then 2400.
another one is output from the serial pin is simple high and low signal 0 to 5v, it is difficult to decode at receiver.
you have to use Manchester code for good result 
regards
aar 
|
|
| Back to top |
|
|
