Infra-Red remote controller

[Horace]

Dear All,

I would like to build a simple remote controller (only ON /OFF).
Would you kindly advise the transmiter and receiver circuit? Thank
you very much.

 

[Anders F]

Dear All,

I would like to build a simple remote controller (only ON /OFF).
Would you kindly advise the transmiter and receiver circuit? Thank
you very much.

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

/A

 

[Luhan Monat]

Dear All,

I would like to build a simple remote controller (only ON /OFF).
Would you kindly advise the transmiter and receiver circuit? Thank
you very much.

Check out TSAL-6200 for the transmitter, and TSOP-4838 38khz IR receiver
from Vishay <http://members.cox.net/berniekm/Hot_Parts.html>

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

 

[Si Ballenger]

Dear All,

I would like to build a simple remote controller (only ON /OFF).
Would you kindly advise the transmiter and receiver circuit? Thank
you very much.

http://kitsrus.com/pdf/k58.pdf

 

[Glenn Gundlach]

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

 

[Anders F]

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?

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

 

[Luhan Monat]

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...

http://members.cox.net/berniekm/super.html

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

 

[Rich Grise]

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

He already _has_ a 68HC908. What the hell does he need with a PIC?
I love the Motorola timer system (at least on the HC05/08/11 chips).

Doing a square wave, or even a pulse train, is almost trivial.

Cheers!
Rich

 

[Spehro Pefhany]

He already _has_ a 68HC908. What the hell does he need with a PIC?
I love the Motorola timer system (at least on the HC05/08/11 chips).

Doing a square wave, or even a pulse train, is almost trivial.

Cheers!
Rich

The peripherals and interrupt systems on Freescale nee Moto parts are
sooo not primitive.



Best regards,
Spehro Pefhany

 

[Luhan Monat]

He already _has_ a 68HC908. What the hell does he need with a PIC?
I love the Motorola timer system (at least on the HC05/08/11 chips).

Doing a square wave, or even a pulse train, is almost trivial.

Cheers!
Rich

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

 

[Anders F]

The peripherals and interrupt systems on Freescale nee Moto parts are
sooo not primitive.

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

/A