Re: [tracker2] Temperature stability
- On Tue, 14 Mar 2006 scott@... wrote:
> If anyone wants KISS mode firmware, let me know and I'll get a file uploadedI'm definitely interested in testing the KISS firmware. Problem is,
> for testing. Digipeating probably won't be ready for testing until this
I don't even know what the board looks like yet...
> One issue that's come up with the current T2 design is that some GPSMost devices these days will work with 0-5V or even 0-3V. I'd make
> receivers like the GPS 3+ require true RS-232 levels to work right. That's
> going to require either an external adapter board, or a transceiver chip on
> the T2. I can probably squeeze one in, but it'll raise the cost by around
> $2, and the power consumption by 5 to 10 mA.
it an external board and keep the T2 small/light.
Curt, WE7U. archer at eskimo dot com
Lotto: A tax on people who are bad at math. - unknown
Windows: Microsoft's tax on computer illiterates. - WE7U.
The world DOES revolve around me: I picked the coordinate system!"
> I'm definitely interested in testing the KISS firmware. Problem is,Ok, it's posted. Use the 'web' button to grab it. It's just a single-bit
> I don't even know what the board looks like yet...
difference in a constant.. haven't had a chance to make it a config option
yet. Oh, and it's hardcoded at 4800 baud for the moment.
> Most devices these days will work with 0-5V or even 0-3V. I'd makeI'm going to throw together an adapter board with an ST202 or something
> it an external board and keep the T2 small/light.
similar... really only needs a single non-inverting transmitter. It could
go in a C6 case, but the C6 won't fit on the OT2m without blocking the radio
port. A C4 might work, but would probably require some retooling. Or I
could go with SMT and try to squeeze the whole thing in a DB9 shell. Hmm..
know of any good metallized shells that have DB9s on both ends?
I've been so busy with other stuff, I've hardly had a chance to touch the T2
since Sunday. I did get the PSK31 firmware modified to allow carrier
frequency selection, though... I'm proud of that. Thought it was going to
be a real pain, but it worked way better than I expected. DigiPan decodes
it all the way from 62.5 hz all the way up to almost 8 khz - and with a
sample rate of 11 ksps, so it's decoding a Nyquist image! Didn't think the
signal would hold up that well.