Reply
 
Thread Tools Search this Thread
 
Old 22 November 2014, 04:45   #31
Member
 
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,251
WAFIs have used them to provide wireless routing (pick up the marina Wifi and share it, use 3g if no wifi that sort of thing) plus provide some home moniotring - battery state, bilge level, bilge pump use, GPS location etc.

In theory you can run Open Charting Software on it. But then you need a screen which will cost you as much as a tablet but not have the portability to bring it home and play etc.

I'd suggest the Pi is useful for something headless (i.e. it sends data to another PC) or something that might output to a 16 x 2 LCD panel which can be done from a Pi for about 10.

But I agree (OMG) with Poly - find the problem then the solution. If the solution is a Pi thats great. But some of the WAFI guys say the Pi is overkill for some solutions and at 800mA of 5V power is eating 20 x what a Arduino could draw for the same task.

Just to note the power draw is up to 1A at 5V - so I think the power supply mentioned in mW above might have been meant to be mA. If I was putting this on a boat I'd pick one of 2 things:

- A 4 port USB socket something like this:
New DC 12V 24V 40V to 5V 4 USB Step Down USB Step-down Power Supply Module | eBay
to give me some extra USB charging ports for phones etc. or even:
12V Dual Car Cigarette Lighter Socket Charger Power Adapter USB Splitter 1A 2.1A | eBay

Both with a USB standard to USB mini onto the Pi power socket.

OR if I knew i had a permenant fix I'd just use something like this:

2014 New Waterproof DC Converter 12V Step Down to 5V 3A 15W Power Supply Module | eBay

(or a non encased version within the PI case) - connected directly to the PI GPIO

You might need to watch what happens with all of these when the engine is starting - the available voltage may drop to < 9V causing the PI voltage to drop out momentarily. There are means and ways round this using capacitors etc - if it was an issue the Pi community would soon find you a suitable circuit!
__________________

__________________
ShinyShoe is offline   Reply With Quote
Old 22 November 2014, 04:48   #32
Member
 
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,251
Another way to identify the problem might be to think... "what would I want to use a 300+ laptop for" on my boat and then see if a Pi can do it...
__________________

__________________
ShinyShoe is offline   Reply With Quote
Old 22 November 2014, 04:53   #33
Member
 
HughN's Avatar
 
Country: UK - England
Town: Littlehampton, W Sx
Length: no boat
MMSI: 235101591
Join Date: Jan 2012
Posts: 732
Quote:
Originally Posted by ShinyShoe View Post
...what a Arduino could...
Other microcontrollers are available...
__________________
"Can ye model it? For if ye can, ye understand it, and if ye canna, ye dinna!" - Lord kelvin
HughN is offline   Reply With Quote
Old 22 November 2014, 05:45   #34
Member
 
jlandells's Avatar
 
Country: UK - England
Town: Swindon
MMSI: 235910561
Join Date: Oct 2013
Posts: 89
Quote:
Originally Posted by ShinyShoe View Post
Just to note the power draw is up to 1A at 5V - so I think the power supply mentioned in mW above might have been meant to be mA.

Yup! Fat fingers - small phone!
__________________
jlandells is offline   Reply With Quote
Old 22 November 2014, 07:50   #35
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
Went to Maplins and they only sell the kits with everything in so I'm going to look on line for one

A few of us might be getting together one evening to chat about it

I'll order one tomorrow
__________________
whisper is offline   Reply With Quote
Old 22 November 2014, 08:47   #36
Member
 
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,251
In that case you need to decide if you want an A, B, A+ or B+. A has 256Mb B has 512Mb. If you don't know the application got to be a B or you may find it under powered. BUT B consumes more power. B+ has extra USB ports which if you are putting a head on it will be very handy for the Wifi, Mouse, Keyboard etc. Not sussed out the A+ advantage. I have a B, bought a B+ for the headless weatherstation but may well actually put the B in that box and keep the B+ for my toy.
__________________
ShinyShoe is offline   Reply With Quote
Old 22 November 2014, 09:11   #37
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
I want to build something for biffs sun seeker, doesn't matter if he doesn't end up using it though...

Biff has done so much for us so we could return the favour?

I think it needs to be controlled via an iPhone, he does have led lights fitted in two different colours and lots of other stuff going on.

I'm up for any ideas???
__________________
whisper is offline   Reply With Quote
Old 22 November 2014, 11:43   #38
Member
 
Country: UK - England
Length: 3m +
Join Date: Sep 2008
Posts: 2,251
Mmmm... So now you need WiFi, a web page on the pi to do stuff. But u still don't know what stuff is...
__________________
ShinyShoe is offline   Reply With Quote
Old 22 November 2014, 13:47   #39
Member
 
Country: UK - England
Town: Royal Wootton Bassett
Length: 8m +
Engine: 250
Join Date: Jul 2008
Posts: 8,020
OK, I think Biff has an iphone 4? (don't think a 4 has siri)

On Sunny he has 2 x led circuits, one is red to light the cockpit while night driving and the other is white to light the cockpit while moored up. There may be another set if he has underwater transom lights...

How it works...

Assuming the iphone can connect direct to the Pi using wifi and not the internet? (sorry i don't know how this bit works) It would need to work while walking to and from the boat.

So on the iphone there should be six commands:

White lights on
White lights off
Red lights on
Red lights off
*Blue lights on
*Blue lights off

*Assuming transom lights are fitted.

The Pi receives the signals and energises the required relay that is run in parallel to each led on/off switch.

How does that sound?? Probably completely wrong
__________________
whisper is offline   Reply With Quote
Old 22 November 2014, 14:21   #40
Member
 
Bigmuz7's Avatar
 
Country: UK - Scotland
Town: Glasgow
Boat name: stramash
Make: Tornado
Length: 5m +
Engine: Etec 90
Join Date: Feb 2006
Posts: 5,068
Quote:
Originally Posted by jlandells View Post
Holy sh*T ...... what a nerd ... but I kinda like it
__________________

__________________
Bigmuz7 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 00:33.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.