View Full Version : generating 38khz signal

09-30-2005, 03:55 PM
can ne1 help me in generating a 38khz signal from an ir led without using any external circuitry,i.e i want to do that using a program,just give e some algorithm sort of thing

10-01-2005, 08:53 AM
wihout using any external ciruitry,there is only on option i.e., use your pc.
follow the nice parallel port tutorials on the site given by ICE.
if not that then u require a min. of IC555 to generate a pulse of 38khz.
the third and best option i like is use a microcontroller.its easy and gives u flexibility also.

10-01-2005, 11:34 AM
i was actually in need of a program to generate 38khz using at89s2313
and plz reply as soon as possible,its urgent....................

10-01-2005, 02:26 PM
No such chip as at89s2313 only at90s2313

10-02-2005, 08:31 AM
that was a mistake out of hurry vikas

10-20-2005, 12:01 PM
Whats the cystal you are using for the 90S2313 ?

just connect the LED to a transistor or directly to the output pin of the micro. Then simply generate a on/off signal using timer 0.0263 mS which means every 26.3 micro seconds. This will give you a square wave of duty cycle 38Khz.

Umm i think that should work ... let me know


Nimesh S Chinoy