[SPAM] RE: [aprssig] PIC and Modem experienting

['Scott Miller']

That sounds right.  When it's transmitting at 1200 baud, it's receiving at
150 baud with tones around 386 and 486 hz.  The back-channel is only useful
for a wired connection really.  Just use m0 and m1 to switch to TX mode when
you transmit.
 
Scott
N1VG


  _____  

From: aprssig-bounces at lists.tapr.org [mailto:aprssig-bounces at lists.tapr.org]
On Behalf Of Andrew Rich
Sent: Tuesday, April 24, 2007 11:38 PM
To: TAPR APRS Mailing List
Subject: RE: [SPAM] RE: [aprssig] PIC and Modem experienting


Am I reading this right ? Each time you want to TX or RX with the MX614 you
have to change m0 and m1 because there is no such mode as 1200 RX / 1200 TX
 

-----------------------------------------
Andrew Rich
Amateur radio callsign VK4TEC
email: vk4tec at people.net.au
Brisbane AUSTRALIA 

-----Original Message-----
From: aprssig-bounces at lists.tapr.org
[mailto:aprssig-bounces at lists.tapr.org]On Behalf Of 'Scott Miller'
Sent: Wednesday, 25 April 2007 2:17 PM
To: 'TAPR APRS Mailing List'
Subject: [SPAM] RE: [aprssig] PIC and Modem experienting
Importance: Low


Circuit Cellar often has articles on PICs and telemetry applications.
 
I can help you with the MX614 at least - I've got them on my website at
https://www.argentdata.com/catalog/product_info.php?products_id=51 ($9) with
cheap shipping to Oz ($2.80).  It's one of the few things I've got in stock
at the moment - though I think the crystals already got moved to the new
place.  I don't have a quantity discount listed for the 614, but if you want
5 I more I can give you a break on them.  Good luck finding a domestic
distributor - even here in the States you've got to buy 10 at a time through
the regular distributors, and that only gets you a discount to $8.85 each.
And they don't like dealing with hobbyists.  That's the only reason I carry
them... it bugs me for a part so useful to hams to be so hard to get.
 
Scott
N1VG


  _____  

From: aprssig-bounces at lists.tapr.org [mailto:aprssig-bounces at lists.tapr.org]
On Behalf Of Andrew Rich
Sent: Tuesday, April 24, 2007 5:30 PM
To: ozaprs
Cc: Aprssig
Subject: [aprssig] PIC and Modem experienting


Gudday
 
I have been playing with a PIC chip and a GPS and a 433 MHz pair of radio
modules.
 
The radio modules use ASK or OOK. I have had limited success and the link is
immune to corruption.
 
I am thinking of trying MX614 and the PIC for telemetry.
 
Anyone playing with PIC's for telem ?
 
Looking for a source of MX614 down under as well.
 
Andrew 

-----------------------------------------
Andrew Rich
Amateur radio callsign VK4TEC
email: vk4tec at people.net.au
Brisbane AUSTRALIA 

 

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