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. Thu, 04 Dec 2008 15:08:30 -0800 http://backend.userland.com/rss092 HI GUYS,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 <noauthor@nospam.com> http://www.8051projects.net/forum-t10679.html I hope you have read how RC5 remote works.. so the time for every bit is defined and fixed. After you sense the first low at pin where IR receiver is Ajay<contact@nospam.com> http://www.8051projects.net/forum-t10679.html what is the difference between 1738 and 1736,what is the problem with 1738....ur code is in C or it is in assembly language......thanx for ur suggetio electronicfreak<sachin.kolkar@nospam.com> http://www.8051projects.net/forum-t10679.html TSOP series is represented as TSOP17XXwhere XX means the modulating frequency.if you are modulating data to be sent at 38khz then you have to use TSOP Ajay<contact@nospam.com> http://www.8051projects.net/forum-t10679.html Read this for RC5 ... http://www.ustr.net/infrared/infrared1.shtmlAnd here's Ajay's code in asm ... http://www.8051projects.net/downloads185.html sashijoseph<sashijoseph@nospam.com> http://www.8051projects.net/forum-t10679.html i m using the counter in microcontroller, it it increments the register when rising pulse occurs... is it a right right way to read the rc5 code...in electronicfreak<sachin.kolkar@nospam.com> http://www.8051projects.net/forum-t10679.html hi u can use interrupts pins...it ill be easy way i think write ur counting program inside interrupt service routine...... umibond<umesh.chandru@nospam.com> http://www.8051projects.net/forum-t10679.html i dont know how to count a signal which connected to intrupt pin....please can u send me anyexample code......is it works like inbuilt counter as ment electronicfreak<sachin.kolkar@nospam.com> http://www.8051projects.net/forum-t10679.html thanx every one, i m using the PIC16F72 for this project ,and i m using synchronus counter on pin PC1...... there are 2 counter input pins , can i sh electronicfreak<sachin.kolkar@nospam.com> http://www.8051projects.net/forum-t10679.html just use the timer in counter mode and i think you dont even need to use interrupt pin.whenever a the input signal complete its cycle counter will be Ajay<contact@nospam.com> http://www.8051projects.net/forum-t10679.html well, if there are two timer/counters in the PIC,i think u may need both of them, one in the counter mode to count the pulses and one in the timer mod pdi33<islurpundalik@nospam.com> http://www.8051projects.net/forum-t10679.html Electronicfreak, he is not angry on anyone Please take it lightly..anyway.. there are number of ways you can decode the IR signal. as i told you my a Ajay<contact@nospam.com> http://www.8051projects.net/forum-t10679.html 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 orde sashijoseph<sashijoseph@nospam.com> http://www.8051projects.net/forum-t10679.html right arun , i got it now. actually , i was thinking on the lines that the pulses are continuous, but the IR sensor would give a burst of pulses whic pdi33<islurpundalik@nospam.com> 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 t electronicfreak<sachin.kolkar@nospam.com> http://www.8051projects.net/forum-t10679.html