Infra-Red remote controller

Check out TSAL-6200 for the transmitter, and TSOP-4838 38khz IR receiver from Vishay

You will need to modulate the IR LED at 38khz, the receiver unit puts out a digital output when this carrier is detected.

Look at app.notes from all the uC vendors (Texas, Atmel, Microchip etc)....

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I've been doing some IR transcoder stuff using a Motorola (Ok, its Freescale) 68HC908JK3. Even running with max clock of 32 MHz (8MHz bus) I can't do the 38kHz pulses without additional hardware (4 bit counter and a 22V10) though I have this suspicion that it I were a better programmer, it could work. Can the Atmel or PIC do the pulses directly in the processor or would added hardware be needed? Using a commercial IR receive module, the reception and re-transmission is rock solid. BTW this 'glues' together the Samsung DLP monitor and ATSC set top box. GG

Most of the time, you can just make up the 38khz pulses in software using a PIC. See the 38khz function of...

This is no problem at all even when running 4Mhz clock on the PIC.

I haven't started my design yet... ;-) But you should definitely do the modulation (38kHz) in a counter (PWM). I'm sure the Freescale has such (as all the other does ;-). Then you should have no need for anything near the clock frequencies you've stated. =)

Cheers, Anders

He was asking if he needed extra hardware, probably not, if a PIC can do it in software, so can about any other micro.

In any case I agree 100% with Rich: Do it in a timer!

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