RE: TTL converter advice req

["Justin" <justin@xxxxxxx>]

Thanks for the offer Luc. I'm actually picking up a MAX233 later as I
understand
>from

TBH, I've go no idea yet what the hell I'm supposed to do with it when I
get
it!

Anyone care to chime in with pointers, diagrams, links, a prayer?

Mark,
I have called Visonic UK to ask what the headers are, they said they didn't
know, if they did they wouldn't tell me anyway and I should buy an adapter!
I have also emailed the Head office in Israel, but I am doubtful they will
be
much help.
The most helpful response so far has been from Gardiner Security:

"i would use a max 232 and use the RS232 voltages to drive the IC. I
am not
sure what the pins are but i would start with zone 30 -ve is PCB ground and
one of those 4 pins must be the same. I suspect another is plus 5v and then
rx and tx to which you just swap around till it works!"

I'll see what other info I can dig up and let you know what happens.

Justin.(feeling very much out of his depth)


-----Original Message-----
From: Luc Degrande [mailto:luc.degrande@xxxxxxx]
Sent: 08 March 2002 12:21 PM
To: ukha_d@xxxxxxx
Subject: Re: [ukha_d] TTL converter advice req


I have build a converter like this for aligning Sony monitors.
It uses a MAX232.
The PCB is approx 3 x 6 cm and has a DB9 for the COM
port. outputs are receive and transmit ( no other signals
are converted).

I can supply the schematic, PCB design .....

Luc.

----- Original Message -----
From: "Justin" <justin@xxxxxxx>
To: "Ukha_D" <ukha_d@xxxxxxx>
Sent: Friday, March 08, 2002 10:14 AM
Subject: [ukha_d] TTL converter advice req


> My new alarm system has a serial interface for software programming
> but it requires a TTL converter.
> The serial adapter comes with the software kit (£63), but as the
software
> is freely downloadable, that means the adapter is £63!
>
> My question is, is an RS232 TTL converter a standard thing? i.e could
I
buy
> one off the shelf and knock something up for less than £63?
>
> Thanks,
>
> Justin.
>
>
>
> For more information: http://www.automatedhome.co.uk
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