8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes : Forum / topic http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb Creative Commons LicenseThis work is licensed under a Creative Commons Attribution-Noncommercial 2.5 India License.Rickey's World Disclaimer Ajay Bhargav - contact@nospam.com contact@nospam.com Thu, 20 Nov 2008 23:19:18 -0800 Thu, 20 Nov 2008 23:19:18 -0800 http://backend.userland.com/rss e107 (http://e107.org) 60 Search Search 8051 Microcontroller Projects AVR PIC Projects Tutorials Ebooks Libraries codes query http://www.8051projects.net/search.php IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html I m facing a problem how to count the pulse codes given by the IR sensor TSOP1738...
i want program on the basis of which key is pressed in the remote...
I m working on a home automation( IR) project, and i m using the PIC16F72 mcu.
already i was enable the counter read the o/p of the IR sensor, but i don't know how to read the codes according to the key pressed......
please help me, and send me some example codes.........
ITS VERY URGENT......... this PROJECT DEAD LINE is on 18th july....
help me................]]> Mon, 07 Jul 2008 21:24:03 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html
You may need to do lot of testing as timing is always a problem.
Try to start with something. Use my 8051 IR project as reference. It will help you.

use 1736 for reception not 1738.

PS: moving this post to PIC Discussion section.]]> Ajay<contact@nospam.com> Tue, 08 Jul 2008 08:19:22 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html ur code is in C or it is in assembly language......
thanx for ur suggetion..........
may i know at what time u will be online......]]> electronicfreak<sachin.kolkar@nospam.com> Wed, 09 Jul 2008 03:05:13 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html where XX means the modulating frequency.
if you are modulating data to be sent at 38khz then you have to use TSOP1738 so that you can demodulate the signal successfully.

RC5 remote use 36khz carrier frequency so you have to use TSOP1736 to demodulate the remote signal successfully.

I dont have a fixed time for being online ]]> Ajay<contact@nospam.com> Thu, 10 Jul 2008 07:12:53 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html http://www.ustr.net/infrared/infrared1.shtml
And here's Ajay's code in asm ... http://www.8051projects.net/downloads185.html]]> sashijoseph<sashijoseph@nospam.com> Thu, 10 Jul 2008 11:16:27 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html in ur prooject you r using the INT1 pin?
it makes any difference ]]> electronicfreak<sachin.kolkar@nospam.com> Thu, 10 Jul 2008 22:39:31 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html ]]> umibond<umesh.chandru@nospam.com> Thu, 10 Jul 2008 23:01:55 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html please can u send me anyexample code......
is it works like inbuilt counter as mentioned in my previous reply..
]]> electronicfreak<sachin.kolkar@nospam.com> Fri, 11 Jul 2008 00:33:53 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html electronicfreak<sachin.kolkar@nospam.com> Fri, 11 Jul 2008 21:17:16 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html
whenever a the input signal complete its cycle counter will be incremented by one. Hence your pulses will get counted automatically.]]> Ajay<contact@nospam.com> Sat, 12 Jul 2008 07:11:42 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html pdi33<islurpundalik@nospam.com> Sat, 12 Jul 2008 11:52:10 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html

Please take it lightly..

anyway.. there are number of ways you can decode the IR signal. as i told you my asm code do the same. you can take it as a reference.

I have considered the fixed timing of IR signal which is known as per RC5 protocol. other way is you calculate the timing on runtime by using timer controlled by interrupt.

If you do the timer way, your program will become clock frequency independent. So you can use either way you want.

You can download the code from download section and test it and analyze it carefully.]]> Ajay<contact@nospam.com> Mon, 14 Jul 2008 08:05:43 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html
Calling electronicfreak....... do you want to decode the RC5 pulses in order to determine which key was pressed or do you want to count the number of pulses received?]]> sashijoseph<sashijoseph@nospam.com> Sun, 13 Jul 2008 00:01:04 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html actually , i was thinking on the lines that the pulses are continuous, but the IR sensor would give a burst of pulses which can happen randomly in real time so yes, u need the interrupt to sense when that occurs, right?

good thinking .
]]> pdi33<islurpundalik@nospam.com> Sun, 13 Jul 2008 00:02:25 -0700 http://www.8051projects.net/forum-t10679.html Re: IR based home automation HOW TO COUNT THE PULSE CODE MODULATION OUTPUT http://www.8051projects.net/forum-t10679.html sashijoseph wrote ...

Guys,I think the OP wants to decode the RC5 codes rather than count pulses.

Calling electronicfreak....... do you want to decode the RC5 pulses in order to determine which key was pressed or do you want to count the number of pulses received?

i want to determine which key was pressed .. which ever the way ,its counting pulses of the burst or the other
]]> electronicfreak<sachin.kolkar@nospam.com> Sun, 13 Jul 2008 21:44:39 -0700 http://www.8051projects.net/forum-t10679.html