[time-nuts] ***SPAM*** Oncore m12+t PPS sawtooth correction board.

EWKehren at aol.com EWKehren at aol.com
Wed Dec 3 06:18:34 EST 2014


In the recent past I did offer a board and parts for some one to take on  
the PIC programming for a saw tooth correction board. No takers.My offer 
still  stands. One of our tem members has a nice working unit in PIC Basic not  
understanding code it does how ever look very simple. I think what would be 
nice  is a chip that works with the different GPS units. As time nuts having 
hardware  saw tooth correction should be of interest. 
I also have a ublox design waiting for the PIC code again the same  offer.
The code should also have the feature that the GPS engine can be instructed 
 to do a survey with out having to use a PC.
If any one is interested please contact me off list once we have it working 
 I will gladly do a board that will work with the units the code has been 
written  for, after discussion on the list what should be on the board.
Bert Kehren
 
 
In a message dated 12/3/2014 1:37:03 A.M. Eastern Standard Time,  
michael.cook at sfr.fr writes:

Hi  Tom,
I would certainly be interested. I have 4  receivers that I would  like to 
add that feature to. I was thinking of also trying the technique with  other 
receivers, such as Trimble Jupiter/SMT or newer Ublox which provide  
quantization data so I was thinking of a more generic serial/PPS pass through  
which could handle all those protocols quantization messages. 


>  Le 3 déc. 2014 à 04:56, Tom Wimmenhove <tom.wimmenhove at gmail.com> a  
écrit :
> 
> I'm using a soekris net4501 that I hacked according  to
> http://www.febo.com/time-freq/ntp/soekris/
> I have hacked a  Motorola Oncore M12+T receiver inside the case on a piece
> of  veroboard. It's really ugly, using a bunch of discretes for RS232
>  translation and such.
> A BNC on the front privides PPS for use with  other external hardware.
> Recenlty I felt the need to add hardware  sawtooth correction. I want to 
use
> the Dallas DS1023 chip to do this.  I designed a little board as a 
'carrier'
> for the motorola, a little  micro, the delay line for sawtooth correction
> and rs232 for the  soekris (but could, of course, also be used to connect 
to
> any other  device that has RS232).
> 
> I was wondering if there was any  interest from other people for a little
> board like this. I don't have  the parts yet, but the DS1023 is pretty 
much
> the most exotic part on  the board.
> 
> I have attached some pictures of the  design.
> 
> Regards,
> Tom
>  
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