Re: DIY IR receiver - finding parts & advice.

["Justin <justin@xxxxxxx>" <justin@xxxxxxx>]

I'm going to take this off list now as it looks like it's just you 
and me Ian and it might get a bit involved!

If anyone is interested I'll post a summary when I get it sorted.

Justin.

--- In ukha_d@xxxxxxx, ian.bird@c... wrote:
> 
> OK, my guess is that the receiver will send around demodulated 
data. From
> that you then need to know the voltages concerned. You mentioned 
the supply
> is 12 volts I think and it is easy to get the 5 volts needed for 
most
> receivers from this, just a voltage regulator and a capacitor or 
two. Once
> you have that you then need to know whether the signal line is 5 or
12
> volts. If the latter then a transistor would be needed. Finally you
need to
> know whether the signal line is low or high 99% of the time.
> 
> The most expensive bit would be the receiver at around 1.50 ish 
give or
> take. The other components come to a quid or so as well. Not bank 
breaking
> stuff but you do need to know the answers to the questions before 
you set
> off. If you have a voltmeter etc. these would not be too difficult
to find
> out.
> 
> As far as plugging in an IR emitter I assume this plugs into a box
of one
> sort or another. If this is the case you cannot assume anything on
the
> input as the box may do stuff you are unaware of e.g. re adding
the
> carrier.
> 
> > Well I'm really getting into this soldering lark (it's all your
fault
> > BTW ;-)), so I would prefer to find a homebrew solution.
> Just get the answers and off we go. Glad I could get someone else 
into the
> art of destroying electronic components in the most exciting way 
possible.
> One of my other victims still holds the record after literally 
blowing one
> of the three legs off a transistor to make a diode ;-)) 'Must read
the
> diagram more carefully' I think he said........
> 
> Ian
> 
> 
> 
> 
> 
>                                                                    
                                                                  
>                      
"Justin                                      
                                                                  
>                      
<justin@gadgetjun       
To:       
ukha_d@xxxxxxx                                               
        
>                      
kie.net>" <justin        
cc:                                                                  
                 
>                                               
Subject:  [ukha_d] 
Re: DIY IR receiver - finding parts &
advice.                       
>                      
28/01/03 
14:03                                                                
                                 
>                      
Please respond 
to                                                                   
                           
>                      
ukha_d                                                               
                                          
>                                                                    
                                                                  
>                                                                    
                                                                  
> 
> 
> 
> 
> --- In ukha_d@xxxxxxx, ian.bird@c... wrote:
> 
> > The circuit you posted is a complete receiver and transmitter
that
> will
> > replace all your Xantech stuff. From your post I assume you
only
> want the
> > receive bit, am I correct?
> 
> Um...not sure now :p
> 
> > Assuming I am you need to find out whether the Xantech stuff
pumps
> around
> > modulated or demodulated signal.
> 
> Can I assume that as a regular emitter can be hooked up directly to
a
> Xantech receiver the output is modulated?
> 
> I don't know as sadly I cannot afford
> > Xantech stuff.
> 
> Neither can I really - had to sell a kidney :-)
> 
> Demodulated means the IR 'carrier' (the 38KHz bit present
> > when the IR has to be sent) has been stripped from the signal
and
> the
> > receiver simply puts out an on or off for relatively long
periods
> of time.
> > This is how the epanorama circuit works and it is the GP1U52X
which
> does
> > the stripping. The 7555 simply puts the carrier back onto the
> signal for
> > sending out of the IR transmitter so the equipment can recognise
it.
> 
> Thanks for the summary.
> 
> > I believe Comfort do an IR receiver that may work for you
although
> I don't
> > know the code for it. If you don't have an answer by tonight let
me
> know
> > and I will look it out.
> 
> Well I'm really getting into this soldering lark (it's all your 
fault
> BTW ;-)), so I would prefer to find a homebrew solution.
> 
> Cheers,
> Justin.
> 
>
>                      
<justin@xxxxxxx
> To:       "ukha_d@xxxxxxx"
> <ukha_d@xxxxxxx>
>
>                      
kie.net>
> cc:
> 
>
>                                               
Subject:  [ukha_d]
> DIY IR receiver - finding parts & advice.
>
>                      
28/01/03
> 12:09
> 
>
>                      
Please respond
> to
> 
> >
> ukha_d
> 
> >
> 
> >
> 
> >
> >
> >
> >
> > Just before Christmas a purchased some Xantech bits from the
> States, one of
> > the
> > items, a "Hidden Link" IR receiver, has died :(
> > A replacement is most likley out of the question due to
shipping
> costs so I
> >
> > thought I would look around for some homebrew solution I could
put
> in the
> > Xantech enclosure.
> >
> > I was thinking of using this circuit:
> > http://www.epanorama.net/documents/ir/irremote.html
> >
> > Anyone using that circuit? Is there something better I 
could/should
> use?
> > I don't know where to get a GP1U52X (tried Maplin). Any pointers
or
> > equivelents?
> > This would be wired back to a Xantech block so I guess would
need
> to get
> > convert the 12V input to 5V but I'm not sure how to do that!
> >
> > Any advice appreciated.
> >
> > Cheers,
> > Justin.

Yahoo! Groups Sponsor

ADVERTISEMENT

http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx 
Subscribe:  ukha_d-subscribe@xxxxxxx 
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx 
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here - http://groups.yahoo.com/group/UKHA_Grouplists/

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.