mcp
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Posts posted by mcp
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When in regards to a very simple power supply, as in a Transformer and Rectifier (simple non regulated battery charger) yes simple Ohms law, (or resistance), would be correct.
But for a properly designed/controlled multistep charger, the Battery resistance does not apply.
And yes, there are some chargers out there that are more about marketing hype than actual "smarts", but there are also many chargers that are truly very sophisticated computer controlled charging devices.
Wheels no and sorry, I do not want to disrespect you as you are very knowledgeable in so many technical areas and have taught me tons about repairs and other little golden musings while reading your posts on this website......but without being a load the battery can not be charged. Also, because a battery heats and gases, this proves the battery is a resistive load to the charger. Ohms law applies to every circuit..always.
Multistage chargers are made out to be super technical devices and they really are not. Some of them that are running FPGA's [Field programmable gate array's - for IslandTime] where firmware can be updated and they can integrate with other systems are getting quite clever. But the charge circuits themselves do a relatively straight forward job and are not complicated. The stages are labeled so they sound fancy, 3 or 5 or 7 stages, they describe the stages that the battery is at. There really are only two stages of a multistage charger and that is charge and float. The rest is a description of what the battery is doing and what the marketing department use.
Luigi - EMF / Electromotive force is going to describe changing another type of energy into an electrical energy and describe its potential for work [in volts] ie: a wind turbine will convert wind energy into electrical energy, is where you would use emf in your example/description. A cell in a solar panel would be another great example.
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First of all, you cannot use ohms law to calculate the charge current into the battery.
Easy. Batteries resistance [at its current state of charge - this changes as it charges] / voltage = Current. I = R/V is ohms law and this is a prefect example of how it works. A battery changer can not rewrite the laws of physics.
I am very aware of how these chargers work but they are mostly a triumph of marketing over technology.
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This is a real pain in the A when you want the greater charge current to be the primary charge source. Someone needs to design a single charge reg that combines all source currents and feeds that as a single regulated output.
The batteries resistance dictates charge acceptance and ohms law would cause a higher current if available to be the primary source.
You could easily combine multiple different output voltages into a single static output voltage using buck boost regulators and feed the single regulated voltage to a single Mttp controller that could handle the combined amperage. I would exclude a wind generator from this though.
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So glad i just paid $300 in fees
Is Black Panther going to be entering in some rum races?
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Yachties are a soft target, not a lot of cohesion amongst them, for reference look at this forum,
;-(Regional council have no jurisdiction over commercial marine activities. So can only pick on recreational water users.
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What a joke. I read that an individual female fan worm produces 50,000 eggs. When are they going to give up and leave us alone?
Probably not until there is a well written email/letter to someone in the media, that picks up the story and runs with it. A half decent journalist will rip their reasoning apart with simple questioning.
Is there a wordsmith/spin doctor in the forum with contacts?
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My concern is that your are replacing one set or arbitrary requirements with a new set of arbitrary requirements. And these ones are likely to have a number of unintended consequences (more so than the current lot). Firstly the obvious question around a pathway for gaining experience. Then, the likelihood of taking large numbers of semi competent crew just to meet the criteria, as opposed to crew who work well together and can actually deal with problems. And the obvious disadvantage of solo and short handed crew (i.e. the majority of cruisers, going as couples etc).
I believe the fundamental problem is a prescriptive list of requirements. If you applied modern risk management protocols to it, the regs and outcomes would be entirely different. People have commented that the inspection itself is of value (i.e. an independent separate set of eyes). The complaints are around costs, the arbitrary nature of the requirements, and often the lack of relevance to a particular situation.
An effective risk based approach would look something like the following -
YNZ outline topic headings that must be addressed. The skipper can address them in any way they see fit. The overall boat / skipper / crew combo has an assessment via the current inspector arrangements.
Example risk topics are:
Fire
Lost comms
Damaged rudder
Sudden ingress of water
Lost mast
MoB
Navigation competency
etc.
The onus is put on the skipper to determine what is required, and then demonstrate that. I initially envisaged a written type document (similar to a Standard operating procedures manual or an H&S risk assessment) but to be honest, it is probably more value with the inspector doing it verbally, on the basis that topic headings are known beforehand, and there is a clearly identified outcomes. This way better solutions can be arrived at by interaction with the inspector and skipper.
Examples of this could be "skipper has considered night nav, including with boat wide power outage", instead of "thou shall carry a hand held compass"...This option gives the viking in you the opportunity to state that you will just steer by the Pole Star, as you do anyway, or your tablet based digital accelerometer compass unit on your smart phone, if your a tech geek kind of guy. i.e. solutions that suit the type of skipper and type of boat, and closely match the specific situation.
The key advantage here is it forces the skipper to consider their own set up, what they would do, and take ownership of it. It allows for situation specific outcomes, and allows for innovation and accommodates advancing tech. It will probably scare the crap out of bureaucrats, because it doesn't give a nice prescriptive arse covering but invisible protective coat.
In short, YNZ prescribe the outcomes required, not the gear carried etc. The trick will be in avoiding too much paperwork to make the system work. Ideally, YNZ's topic headings wouldn't be more than 1 page or risk areas on a boat.
I find it very hard to fault this post. So.... +1
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With your IT background, If you can do coding you will find work easily without a base.
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Fish. If you have a digital Multimeter? Disconnect the batteries from all wiring and let them rest for a while to settle their voltages. Then measure the resistance across the - & + of each battery. If one has a largely higher internal resistance to the other [being the same brand and age] I would say there would be an internal fault and the higher resistance is causing the heating of a few cells.
Please ignore if this has already been suggested. -
I have 4mm sheathed dyneema on my top lifelines. Its awesome. No chafe issues, care needs to be taken through stantions.
My lower is still wire due to inability to protect from chafe through stantions
Same as clipper and the bonus with dyneema is its easy to take it off to replace/fit foam tube to top life line
Do you guys have some pictures of the product and how it goes through the life lines? I'm just about to do this myself and am undecided about sticking with stainless or going synthetic.
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Cheers everyone.
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What are some good or essential Cruising guides for New Zealand?
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I Dual Carbon Batteries by Ryden. https://revolution-green.com/ryden-dual-carbon-battery/
And there is also rumors that the Japanese company has been working with Tesla on the Tesla S
Sorry, there is no more up to date website.
Interesting, I have never heard of them before.
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The firefly lead foam [as they term it] are really unique in the consumer available batteries with the lead carbon chemistry, as they are a drop in replacement for most lead acid/agm legacy charging equipment. Most other available Lead carbon batteries require lower absorption and float voltages.
IF and only IF, your charging equipment is as adjustable as Victron Mppt Smart solar charge controllers [i am only familiar with what I have], there are other lead carbon batteries available on the market that are as good and in some cases better. If you have to overhaul your entire charging system to cope with a battery upgrade, you really need to talk to a pro, to weight up all the available options and also consider Lithium chemistries.
As an aside and often mistaken for being the same, Lead Crystal is very different and should only be considered if you can hook up to shore power or run a generator daily to meet the exacting charge requirements.
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Hard wire the fridge to 12v. Protect the circuit with a breaker or fuse. Then get a charger for when you are at dock to keep the battery charged.
And now for my sales pitch.
I have a very high quality and very very high output Victron Centaur 12v 80amp marine charger that I am about to sell if you are interested. Send me a message if you like, I will post this on the classifieds shortly and then trade me.
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OK. If you are buying this stuff, you may like to consider the new Navico (Simrad/B&G/Lowrance) VHF60B which includes a AIS Class B transponder. The SOTDMA class B is still unusual, but I have a couple of options...
You mean one N2K bus for the transducers, right? Navico have a range of wind transducers, wired or wireless, that are native n2K. Did you want wired or not?
The Vesper XB8000 is a good fit, as you could use that for your PC interface, via wifi... However, if you want radar, I'd suggest a 3G or a 4G - but they have to use a physical ethernet cable (2 much data for wifi).
If you'd like to look at a system that has Opencpn, and all this gear, you'd be welcome to look at IT sometime, based at gulf harbour.
I'm not actually sure if I want wired or not to be honest. I'm comfortable with either. Is wireless bluetooth, Wifi or 433mhz?
Using Ethernet for the radar is fine, what are the differences between 4g and 3g? Huge long range doesn't really matter as much as detail, being able to track targets/weather cells and I like the idea of close range detail as well if that is even a thing? I did read in a forum that modern broadband radar can detect a whale sleeping/snoozing on the surface?
I might be keen to come and have a look at IT some time and see how you have set things up and get some ideas....or just copy what you have done. lol
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I'm going to us Opencpn with a windows based PC and maybe experiment with a Raspberry Pi. I will interface with a Vesper marine AIS or Digital Yacht AIS. So a single NMEA2000 backbone for every sensor except radar would be best and I'm just trying to suss everything out before I work on a budget.
What wind sensors are NMEA2000?
Also patiently waiting for a Vesper Marine class B+ AIS to be released.
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I'm looking for speed/depth and wind senor/s that will plug straight into NMEA 2000 network. I don't want to use propitiatory formats if I can help it. I will be running a based PC system.
Has anyone else researched the options? Do any of the main brands have a straight NMEA 2000 connection?
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I can see report now.
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Sorry just noticed I get the Edit and Delete options on my posts, they are grey on white but go black if you mouse over.
And Report?
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I reckon its a forum setting that is only available for certain users. Do you have a test account you can log on to in on your browsers incognito mode to fault find?
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Can't see it using firefox either...
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It depends on what hardware and software you are using, on a PC its here;
It may be hidden until you hover over it.... And on other platforms or mobile it may be different....
I can't see that no matter what on chrome browser or on android phone.
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Where is the report button? Is it the red ↓ arrow ?
Battery charger an solar
in TechTalk
Posted
*sigh* That would be Electro "Magnetic" Force
Yes, there is a chemical reaction at the electrodes isn't there? It does not describe voltage, voltage only describes its potential.