[time-nuts] Problems with TAPR Oncore M12+ kit

Chris Waldrup kd4pbj at gmail.com
Tue Jul 4 00:52:50 EDT 2017

Has anyone else received a unit they can't get to work?
I got my unit finally boxed up a few weeks back. The PPS LED flashes and power LED and RXD LED's light but the TxD doesn't. 
I've ordered replacement MAX chips and 74ACT04 chips from Digi-Key but this didn't solve the problem. 
As a next step I've found a Oncore M12 board on eBay coming from China and this should come in a few weeks. 
No serial communications unfortunately. 
I've also tried swapping pins 2 and 3 on the DB9 just in case RX and TX were swapped (although I had originally built the cable as per the schematic with the kit) but still no luck. 
Thanks for any comments. 


> On Apr 29, 2017, at 11:10 AM, Chris Albertson <albertson.chris at gmail.com> wrote:
> On this product people are going to want holes drilled and I think a "D"
> shape hole for the DB type connector.   The holes would allow easy clamping
> but in a two step operation.    If I were making these I'd first clamp the
> stock over a pair of 123 blocks, mill the holes, then after I hade a batch
> of these made,  hole the holes to hold the part a fixture and then mill the
> edges.
> But that said, I could make a pair of these by hand with hack saw, file and
> drill press in about 15 minutes.
>> On Fri, Apr 28, 2017 at 1:41 PM, Jerry Hancock <jerry at hanler.com> wrote:
>> Generally, the way I mill plates such as these is I surface a piece of
>> scrap and then glue (using superglue) the stock down onto the scrap.  I can
>> then machine around the edges without worrying about clamping.  With
>> pockets though, the torque even when ramping down might break the part
>> loose.
> -- 
> Chris Albertson
> Redondo Beach, California
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

More information about the time-nuts mailing list