Myke,

This is a hard wired remote - no I/R transmitter & no modulation just
waveform type  listed below.
I was thinking along same line. Using TRIS bit string for pulses, but
I'm hung up on what freq to run
clock (crystal). I guess I'll just do it by trial & error.....

Thank you

Ray

myke predko wrote:

> Raymond,
>
> I haven't done it for Pioneer brand I/R remotes, but I have for the
> Sony
> spec.  What you're missing (and what's probably most important) is the
>
> modulation frequency (generally 32, 38 or 40 KHz - Sony uses 40 KHz).
>
> When I did it for the Sony, I created a 80 KHz Timer Interrupt and
> incremented a "Real Time Value" and toggled an I/O bit each time I
> entered
> the Interrupt Handler.  In the mainline of the program, when I was
> sending a
> "1" (modulated at 40 KHz), I simply enabled the TRIS bit for the
> number of
> 80KHz "ticks" to send the pulse (the same thing was done for sending
> no
> signal at all).  The I/R Tx LED was wired as a normal diode.
>
> I used the I/R Tx/Rx LED pair from Radio Shack to generate and receive
> the
> signal (receiving to debug it before I sent it to my stereo).
>
> This method really won't be that precise in terms of timing, but my
> Stereo
> likes it just fine!
>
> myke
> >I would  like to build a wired remote control unit for a Pioneer
> Large
> screen TV
> > system.
> >I have to output 33 different pulse width signals, 67 bits long for
> each of the
> > different control
> >functions. Only 6 different pulse widths.
> >
> >              8580us           636us   636us            636us
> >example -   __________        _____   _____             _____
> >            |         |       |    |  |    |            |    |
> >            |         |       |    |  |    |            |    |
> >            |         |       |    |  |    |  //        |    |
> >                      --------     ----    - // ---------
> > -----------------------
> >                        4200us     432us    //   1504us
> 38008us
> >
> >            | <--- START ---> | <------- SIGNAL
> ------------>|<------- STOP
> > ------->|
> >            | <---------------------- 103 ms
> > -------------------------------------->|
> >
> >I want to use the PIC16F84 & a 24LC16B EEPROM that I have avail if
> possible.
> >
> >If someone out there has done this already I would appreciate any
> advice you
> > could give me, so I
> >won't reinvent the wheel. All comments welcome !
> >
> >Thank you
> >
> >Ray Ward
> >rwards@gte.net
> >
> >
>
> "One must invoke enough raw truth to punch a hole in the world" - Darl
> Af