RE: IR Transmitter boards.

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

>As it's pretty easy to fry a 555, can I suggest (if possible) you make
>provision for a diode  to offer some protection?

No problem - just send the circuit mods and I will incorporate them. I
can't
claim to understand exactly how it works yet but I'm game.

>Screw terminals (like alarm panels) would be OK I'd have thought.
>https://catalogue.maplin.co.uk/Pictures/20/3/97NE01B.JPG
Screw terminals would work fine but they would make the board bigger - what
do you think?

Cost should not be a issue - also depends whether you want them drilled or
not. This was the worst bit on the prototype prototype (OK, I broke it!
(the
board track not the drill)). As I said this is not a commercial exercise.
Just a learning experience for me and some fun.

Lastly, how would you like them housed and is size an issue? Looks like
custom requirements aren't going to be a problem!

Ian

-----Original Message-----
From: James Hoye [mailto:jhoye@xxxxxxx]
Sent: 23 November 2000 14:31
To: 'ukha_d@xxxxxxx'
Subject: RE: [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.

Very interested, even more so 'if the price is right' (K Doxey, UKHA circa
2000)!  I have my brother-in-law checking out the IR LED with an IR camera
-
I think that's where my problem lies.  Also it's built on old breadboard
which may have dirty tracks etc.

As it's pretty easy to fry a 555, can I suggest (if possible) you make
provision for a diode  to offer some protection?

> 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.

Screw terminals (like alarm panels) would be OK I'd have thought.
https://catalogue.maplin.co.uk/Pictures/20/3/97NE01B.JPG
M*****s Part No.NE04 or something similar....?

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

Be interested to see.  As I progress, I'll try and get some pictures on my
site - but for now I think I'll wait for your PCB.  My implementation will
be a little different, so it should provide some useful additional
information rather than a duplication.

James H






-------------------------- eGroups Sponsor -------------------------~-~>
Create your business web site your way now at Bigstep.com.
It's the fast, easy way to get online, to promote your business,
and to sell your products and services. Try Bigstep.com now.
http://click.egroups.com/1/9183/3/_/2065/_/974991407/
---------------------------------------------------------------------_->