nmea multiplexer
- Thread starter steve28
- Start date
pvb
Well-known member
Raymarine recommend these...
Raymarine recommend multiplexers from NoLand Engineering and ShipModul, so it's fairly certain these products will work OK.
Raymarine recommend multiplexers from NoLand Engineering and ShipModul, so it's fairly certain these products will work OK.
npf1
Active member
Re: Raymarine recommend these...
A company call Brookhouse also makes them
A company call Brookhouse also makes them
FullCircle
Well-known member
- Joined
- 19 Nov 2003
- Messages
- 28,221
Re: Raymarine recommend these...
I have investigated Brookhouse, and their range is very adaptable to different layouts - but they are not answering their e-mail on the website. I was asking who the UK agent is?
They are a lot cheaper than the Raymarine equiv.
Please let me nkow.
I have investigated Brookhouse, and their range is very adaptable to different layouts - but they are not answering their e-mail on the website. I was asking who the UK agent is?
They are a lot cheaper than the Raymarine equiv.
Please let me nkow.
AlexL
Member
do you mean a multiplexer or expander?
A multiplexer takes many NMEA data streams in and puts them all together on a single data stream - v. complicated and not really DIYable unless you can do wonders with microcontrollers and embedded software. An expander takes a single NMEA data stream in and rebroadcasts it on multiple outputs, so that a GPS for example can talk to loads of different 'listeners'
I did a DIY expander last year - the ciruit diagram is around somewhere if you need it.
you could try these people for multiplexers http://www.shipmodul.com/en/index.html
A multiplexer takes many NMEA data streams in and puts them all together on a single data stream - v. complicated and not really DIYable unless you can do wonders with microcontrollers and embedded software. An expander takes a single NMEA data stream in and rebroadcasts it on multiple outputs, so that a GPS for example can talk to loads of different 'listeners'
I did a DIY expander last year - the ciruit diagram is around somewhere if you need it.
you could try these people for multiplexers http://www.shipmodul.com/en/index.html
qetoo
New member
JerryHawkins
Member
Actisense is another company to look at
They make various electronic bits including nmea multiplexers.
Have a look at their web site:
http://www.actisense.com/
Cheers,
Jerry
They make various electronic bits including nmea multiplexers.
Have a look at their web site:
http://www.actisense.com/
Cheers,
Jerry
philip_stevens
Active member
Steve,
there was a post in June last year about an NMEA Amplifier. Is this what you are after??
If so, try this link http://home.btconnect.com/jeff.penfold/Alex_Lyne/nmea_amp.pdf
If this doesn't work, I have a copy of it on my computer that I can send you if you PM me your email addy.
there was a post in June last year about an NMEA Amplifier. Is this what you are after??
If so, try this link http://home.btconnect.com/jeff.penfold/Alex_Lyne/nmea_amp.pdf
If this doesn't work, I have a copy of it on my computer that I can send you if you PM me your email addy.
What are you actually trying to achieve?
I've thought a lot about this - the complexity is in knowing which occurrences of which sentences to drop in order to fit your quart into a pint pot.
For any given application this is comparatively easy - to do it in the general case is much more complex, and would require fairly powerful computation in the multiplexer that would significantly increase the hardware complexity and cost.
I've thought a lot about this - the complexity is in knowing which occurrences of which sentences to drop in order to fit your quart into a pint pot.
For any given application this is comparatively easy - to do it in the general case is much more complex, and would require fairly powerful computation in the multiplexer that would significantly increase the hardware complexity and cost.
wiggy
Well-known member
I would quite like details of a DIY expander can you pm me details
I have a raymarine rn300 gps,a ds400x fishfinder,and st1000+, wind instrument and laptop.
If i use the gps and wind together with autopilot in windtrim it works fine, if i turn the fishfinder or laptop on the wind info dissapears, turn them off and its back.
the way i see it there is too much talking and not enough listening or the talkers are too loud /forums/images/graemlins/smile.gif
steve
If i use the gps and wind together with autopilot in windtrim it works fine, if i turn the fishfinder or laptop on the wind info dissapears, turn them off and its back.
the way i see it there is too much talking and not enough listening or the talkers are too loud /forums/images/graemlins/smile.gif
steve
NMEA is strictly one talker per circuit - any more than that then you are very lucky if it works at all.
In my present set up I have a switch to select whether the autohelm receives wind data or gps data, but not both. I can't see that it is useful to feed the fishfinder data into the autohelm, so that can be ruled out.
If your laptop is a central part of the system then you could use that as the multiplexer - which would make the task a good deal simpler.
In my present set up I have a switch to select whether the autohelm receives wind data or gps data, but not both. I can't see that it is useful to feed the fishfinder data into the autohelm, so that can be ruled out.
If your laptop is a central part of the system then you could use that as the multiplexer - which would make the task a good deal simpler.
Aeolus_IV
New member
ShipModul
Me too .. easy to install, worked first time. Pretty good price too, though perhaps not the cheapest certainly far from the most expensive. They have a range of connectivity options for connection to a PC (ie blue tooth etc)
Regards, Jeff.
Me too .. easy to install, worked first time. Pretty good price too, though perhaps not the cheapest certainly far from the most expensive. They have a range of connectivity options for connection to a PC (ie blue tooth etc)
Regards, Jeff.
hightech
New member
Re: Multiplexing
If your still struggling try this contact he was a great help to me Ian Stevens................ ians@alstholmventry.com or 07801 353738
Best wishes
If your still struggling try this contact he was a great help to me Ian Stevens................ ians@alstholmventry.com or 07801 353738
Best wishes