Convert IR remote to RF remote

[Caliban]

dean@impartsp.com.au wrote:

Maybe you would like to advise us all why PCM is used over PPM then if
not for improved reliability (stops servo jitter).

Manchester code transmits 01 for logic 0 and 10 for a logic 1 so there
are a number of illegal codes which can be rejected, therefore guarding
against data errors.

I thought the main reason for Manchester encoding was to prevent DC
offset in the data slicer (voltage comparator for 1/0 detection)?

 

[Terry Given]

Caliban wrote:

dean@impartsp.com.au wrote:

Maybe you would like to advise us all why PCM is used over PPM then if
not for improved reliability (stops servo jitter).

Manchester code transmits 01 for logic 0 and 10 for a logic 1 so there
are a number of illegal codes which can be rejected, therefore guarding
against data errors.


I thought the main reason for Manchester encoding was to prevent DC
offset in the data slicer (voltage comparator for 1/0 detection)?

It does that too. Not often you get 2 for the price of 1 eh?

Cheers
Terry

 

[Phil Allison]

"Terry Given"

Maybe you would like to advise us all why PCM is used over PPM then if
not for improved reliability (stops servo jitter).

which, if your plant isnt an integrator, is a real problem - and even if
the plant is an integrator, its often still a bad thing. eg look at the
lengths astronomers go to to reduce cogging torque in scanning telescope
positioning systems.

** You see how Kiwi anencephalics like Given pay no attention to context or
relevance whatever.

The demented due is spread all over the place like a mad woman's breakfast.

But what else would you expect from a puffed up pin ball machine fixer ??




.............. Phil

 

[Terry Given]

Phil Allison wrote:

"Terry Given"


Maybe you would like to advise us all why PCM is used over PPM then if
not for improved reliability (stops servo jitter).

which, if your plant isnt an integrator, is a real problem - and even if
the plant is an integrator, its often still a bad thing. eg look at the
lengths astronomers go to to reduce cogging torque in scanning telescope
positioning systems.




** You see how Kiwi anencephalics like Given pay no attention to context or
relevance whatever.

The demented due is spread all over the place like a mad woman's breakfast.

not bad. See, you dont *have* to be scatologically profane.

But what else would you expect from a puffed up pin ball machine fixer ??

even better.

............. Phil

Well done Phil, you appear to have made it past a 5-year-olds level of
insults.

Cheers
Terry

 

[Phil Allison]

"Terry Given"

Phil Allison wrote:

( snip more of TG's distributed breakfast matter)

Well done Phil, you appear to have made it past a 5-year-olds level of
insults.

** When obvious facts become insults - it is better considered as pointed
criticism.

But you need to be sharp enough to get the point at all ........




............ Phil

 

[Tonyb]

--
tonyb1@worldoptions.com.au
"Matthew Gunn" <matthewgunn_au@hotmail.com> wrote in message news:4230ff5f@quokka.wn.com.au...

I was wondering would it be easy, hard or near impossible to convert an
Infra-red remote control for a car stereo to work on Radio frequency
instead of IR? I have seen a RF data transmitter/reciever pair in Dick
Smith or Altronics catalogue (can't remember which one). Would it be as
simple as replacing the IR LED in the circuit with the transmitter
portion of the RF transmitter/reciever and replace the phototransistor
in the deck with the reciever portion of the RF transmitter/reciever?
Or will I have to make an IR reciever to attach to the RF transmitter
and then a IR LED driven by the RF reciever, like an IR remote extender?
I would like to do away with the IR altogether. I will worry about
how to hide the reciever and make the transmitter at least look
acceptable later.
Any advice appreciated

Matthew

In the September 1997 edition of Electronics Australia, there were details of a kit by Oatley Electronics for a IR to
UHF remote control converter. I don't think the kit is still available but most of the parts should still be available
though there may be a problem obtaining a compatible UHF receiver module which was pre built in the Oatley kit. I hope
this is of some use to you.

tonyb