In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Mag748 wrote:

[3]Hello again. I have been trying this Interrupt routine that you guys suggested and I don't know why, but I am having some kind of problem. I am still using the very basic test program that pulses the IR led at 40 KHz. I even used an oscope to determine the output and it is exactly 40000Hz at 50% duty cycle. And, using a 62 Ohm resistor, the LED is getting plenty of power. Yet, I still can only get the phototransistor to turn on if the unit is less than about 1 foot away. I have tried many different RETURNINT ## values and different clock speeds and different IR LEDs and different resistor values. But nothing seems to be working. I can't find any information on Google either. I can't understand either why it worked with a 555 timer. Anyway, if anyone can shed some light (<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:place w:st="on"><st1:State w:st="on">Ill</st1:State></st1:place> accept IR as well) on this subject, I'd be very grateful.[/3]

[3]<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>[/3] 

[3]Thank you,<o:p></o:p>[/3]

[3]Marcus.[/3]

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