[time-nuts] Re: timing lab, remote control

[Bob Camp]

Hi

A basic twisted pair and a couple of FPGA boards could do pretty much the same thing.

If this is supposed to be a “not a lot of work” project … I suspect this gets crossed off the list pretty early on.

Bob

> On Jan 12, 2024, at 2:03 PM, ed breya via time-nuts <time-nuts at lists.febo.com> wrote:
> 
> Well, it wouldn't be turnkey, but it would be almost trivial to do it the old-fashioned way with direct signalling. It depends on the ethernet connections. If there's only one cable/port/etc that is already committed, then not so good, but if you have a Cat-5 or whatever point to point hard line available, or you can readily add one, then you've got 8 wires per cable available that you can work in countless ways. Simple DIY logic at each end can give as many bits as needed, bidirectional action, and low noise/interference. Optocouplers and such can give isolation and protections as needed too. You could even send low speed analog signals - pure, clean, accurate, and simple.
> 
> If there is one and only one ethernet line available and committed, then you likely still have four unused wires available (unless it's a POE or special type setup that needs them), that can be used for low speed signalling - not as good or clean, but better than nothing.
> 
> The best part of this old-school kind of scheme is that you would have absolute full control and knowledge of what's in there and what it's doing at all times, and the flexibility to easily modify it as needed.
> 
> BTW if this sort of function is desired but no cables are available, there are RF transceivers with simple parallel bit-for-bit protocols, including bidirectional. I got a bunch of these for planned remote control and monitoring projects at the farm. They are 915 MHz ISM, with about a mile range outdoors.
> 
> Ed
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe send an email to time-nuts-leave at lists.febo.com