Re: DIY IR receiver - finding parts & advice.

[ian.bird@xxxxxxx]

Hi Justin

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?

Assuming I am you need to find out whether the Xantech stuff pumps
around
modulated or demodulated signal. I don't know as sadly I cannot afford
Xantech stuff. 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.

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.

Ian

Ian Bird
CibaVision UK Ltd.
Direct dial 01489 775570
Fax           01489
779570


                                                                                                                                      
                     
Justin                                                                                                          
                     
<justin@gadgetjun       
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.





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