[OZAPRS] Computerless iGate

[David and Justine Olsen]

thanks. I have a few options to explore now



On 28/02/2010, at 1:56 PM, Ian Pople wrote:

> Hi All,
>
> A friend and I are looking at making up a few igates based on D-Link
> DSL-502T as we saw someone else had managed to make one work.
> See <http://groups.yahoo.com/group/ZLAPRS/message/2786>
> You can see his status page here <http://www.technzl.com:14501/>
> On our local (NZ) auction website Trademe.co.nz you sometimes see
> these pop up with a low reserve of $10, like this one.
> <http://www.trademe.co.nz/Browse/Listing.aspx?id=268166905>
> Much cheaper than trying to find a WRT54G to play with.
>
> The DSL-502T has a pair of serial ports available on pin headers at
> the front right of the board, only slight issue is that it is all
> 3.3 Volt logic. But you can still make it work with a 5 Volt based TNC
> using voltage dividers and a weak pull-up components.
>
> As for a TNC, there is this design here
> http://users.rcn.com/carlott/atmega-tnc.html
> which uses an ATmega8 microcontroller, and a MX or FX614 modem IC.
> It has some other weather station features and hardware, which we'll
> leave out to keep it basic and easier to build.
> The source code is included and well commented, so one can tinker
> around and change things if need be.
>
> As the design is fairly straightforward hardware wise, I was thinking
> of doing a couple PCBs to fit inside the D-Links, and just run PTT,  
> audio
> in & out, out of the D-Link to a radio.
> While this model of D-Link says 9VAC on the rear as a supply, it uses
> a AP36063 to switch it down to 3.3 Volts, so some other supply voltage
> should be ok too.
>
> 73,
> Ian ZL1VFO
>
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