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Hi,

I don't know if this is standard in this forumn or not but I thought I'd introduce myself.
My name is Doug and have have jsut recently began using the AVR series procoessors for so Astronomy projects. Thi sis the first time in years I have been back into the electronics side of the world, I've been a MVS System programmer for several years now.

Stuff i'm working on include
a GPS interface to a Meade LX200 telescope to set the LAT/LONG, DATE and Time
a Digital Focus Controller (this is the big project) to allow precise focusing of a scope
a Color Filter Wheel, Autoguider and Focus controller
and a stand alone Autoguider

I just ordered a STK500 and Codevision AVR for work with this stuff and I'll be reading through the
archives to see what you've already talked about before asking any questions (and i'm sure i'll have some)

Anyway, Wanted to say Hi to everyone
Take Care
Doug

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Hi Doug,

i want to welcome you too. That´s pretty interesting stuff you´re working on. One question to you (or the audience): Is there a cheap GPS interface available???

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Dieter,
Thanks for the welcome.
Rockwell (I think) has a GPS chipset but I believe it was around $100.
might as well get a Garmin or tripmate instead. I'm sure there are more out there
but that's the one I remember, I have a Garmin III I'm using.
Talking to a GPS is very easy, NMEA sentences are well documented and a AVR with
a LCD can display everything in them. I hope this is what you were after.

Jack,
And thankyou for the welcome also.
I have the circuits laid out for all but the GPS interface and it's a easy one.
2 serial ports, one for the GPS the other for the telescope.
the only AVR with 2 UARTs is the mega103 i believe. that a bit of overkill for the project.
i just need to learn how to treat I/O pins to act as a serial port (bit banging i think is what is called but not sure) . a 2313 would be all I need to use. this won't be much code
the big one is the Digital focuser, so far it has a US Digital Encoder, a Allegro PWM motor control,
LCD, Temp sensor DS1820, and Keypad.

if you want to look at the prelimanary schematic it at http://carroll.dynip.com/genesis...
and the rest of them are under the CCD Camera/Project menu

again thanks for the welcome
Doug

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