RE: IR Transmitter boards.

["Ian" <I.Bird@xxxxxxx>]

When I know the current planned version works I will send you a schematic
and sizing. Let me know any changes you want and I will try to accomodate.
As mentioned elsewhere this is all about learning for me.

As for building one. I used the original parts list from a way back inc. a
CY88. I only really tested that it worked as designed. It was tricky noting
angles etc. with my three year old helping to hold the breadboard. Amazing
it is still in one piece really.

Am I correct in thinking you want to run multiple LED's (both sorts) from
one transmitter circuit. I don't know the answer but power is limited and
you may need some form of boost to do this. Ask Keith, Nigel or pretty much
anyone but me to see how to do this.

Ian

-----Original Message-----
From: BROUGHTON NICK [mailto:nick.broughton@xxxxxxx]
Sent: 23 November 2000 14:14
To: 'I.Bird'
Subject: RE: [ukha_d] IR Transmitter boards.


Ian

My current plan (it's been changing about once a day, the last few days) is
to put the 'transmitter' at node 0.  The resistor and zener for the TSOP
would also be there.
12V would be supplied directly to the 'transmitter'.
Then I would use CAT5 and send one pair for IR LED, one pair for visible
LED
(confirmation), one pair for TSOP output and one pair for 5V supply to
'client' modules.  These modules would simply contain 2 LED's and one TSOP
and (probably) an RJ45 socket, making them suitable for receive, transmit
or
both.

The output, then, from the receiver consists of 8 lines some of which could
be commoned.  12V supply is also necessary.

Assuming your PCB fits my scheme and they're not too expensive, then I'd
buy
one.

As a matter of interest, have you built one yet?  What IR LED did you use?
And how wide was the usable dispersion area?  You may have seen from an
earlier post that the LED I have on prototype board is too narrow.

Regards

-----Original Message-----
From: I.Bird [mailto:I.Bird@xxxxxxx]
Sent: 23 November 2000 14:05
To: ukha.d
Cc: I.Bird
Subject: [ukha_d] IR Transmitter boards.


Assuming I do get these boards (PCB) I am building to work is anyone else
out there interested in some. This is strictly a home brew effort and not a
commercial exercise as per Kat5. The current size is about 1.2 inches by
3/4
of an inch.

I would like some feedback on the connectors people would like (assuming
anyone is interested). Small is the order of the day I think and I was
planing to have a three pin input (power and signal) and 4 pin output - two
lots of LED's (one IR). Thoughts anyone.

I plan to send Nigel finished plans and photos when I get something
workable.

Thanks

Ian






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