F1: Deep depth gauge for rebreather divers

Explorer

See http://www.rebreatherworld.com/rebre...tom-timer.html for additional discussion about this product.

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iain-hsm

Cedric.
I look forward with great interest in OLED display and that the reliability problem have been resolved both with organic and molecule versions of these display’s.
Bright Display Half Life at present is around 10,000 hours regardless of the organic colour. Degration of the cathode is much better. Although there is no doubt that OLED will replace LED and PLED displays in the very near future the price is in part due to the technology.

I am saddened however with some of the company claims:
1. That they out perform the main brands with a sampling rates of only 4 times per second when the latest ccr controllers operates at 6 times per second and with 16 separate items of additional data processing at that.

2. Some of the claims are confusing with this 275 metres / 902 feet depth rating but with the adder (records depth to 500m)? I would expect the company to obtain the pressure chamber first before they “easily” produce a deeper pressure.


As deep as you can go. The Liquivision F1 is rated for 250m, however, the failure depth is much greater than that. Once we get a pressure chamber that can easily produce a deeper pressure, we’ll let you know the failure depth! The important thing is that the highest accuracy is assured to 250m unlike other computers

Accuracy is claimed at 250MSW this is inaccurate, accuracy is resolved +/- there is no tolerance it is not accuracy it is misleading. Iain Middlebrook

tdzao

I'm Eric Fattah, the founder of Liquivision.

I'm glad to see there is some interest in the Liquivision F1 computer. I'd like to clear up some of the confusion.

First of all, people are posting various clips of text from ancient versions of our website. I'd suggest sticking to current information rather than outdated information.

First of all, concerning depth & accuracy. Our pressure chamber goes to 650m. The OLED display tends to fail somewhere between 325m and 500m. However, the computer keeps working and recording your depth even if the display fails (the dive log can later be extracted with the PC interface, even if the display failed). Currently the unit is rated for 275m, but we may increase the rating to 350m on the next batch due to a modified manufacturing process.

In terms of accuracy, the accuracy is better than 0.5% up to 160m, and better than 1% up to 275m. This is thanks to 5 salinity settings which are essential for accuracy. If a computer doesn't ask you what the salinity is, you instantly incur up to a 3% error.

In terms of the home development kit, it may still be released, but I won't guarantee that yet. Do people here think a home development kit would be worthwhile?

Although many people look at the F1 and think the OLED is the main attraction, personally I think there is another, more important feature. The F1 is the only computer I'm aware of which has no airspaces, no o-rings, and a battery which is hard soldered directly to the circuit board. Airspaces and o-rings are liable to fail, and many dive computer failures are caused by poor battery connections. By eliminating airspaces, o-rings and by soldering the battery to the circuit, these sources of failure are removed.

Many people think that OLED's will start appearing everywhere in the dive computer market. Think again. OLED's have been out for some time. Why hasn't any other company come out with an OLED computer yet? The answer is that incorporating OLED's into dive computers isn't as obvious as it seems.

If anyone has any other questions about the F1, please ask.

Liquivision was founded by divers for divers. If you want a specific feature in your dive computer, just say so and we'll do our best to incorporate it as soon as possible.



Eric Fattah
Liquivision Products

silent running

Hello Eric, thank you for taking the time to post the info. As for specific features, it looks like your computer is not an actual deco computer. How about a constant PO2 RGBM deco comp using that nifty OLED, no-airspace, rechargeable battery design? -Andy

Mdemon

Yup, thanks Eric.

Two things;

a) hardwired battery. If this fails, will you replace the battery?

b) Open source/Developer kit. This is a good idea. No, it's a GREAT idea. Because you won't have any development costs for deco algorythms, lots of manufacturers (and I know of one right now) would love to put their algorythm into a dive computer but don't have the expertise to produce one and regardless of what goes in - EVERYONE will have to buy a unit from you. Your liability will just be that the hardware works, not the deco software.

From an end-user perspective, I would get a lot more choice about how I dive deco-wise and am immune to the rape and pillage that comes with VR£ "upgrades". I could write my own if I felt like it and the only cost would be the Developer kit, the cost of which you will keep down, won't you, to encourage development and therefore your sales.

Just work on the price tag of the unit. My old VR£ is still better value at the moment (it's a proper, tested dive computer that's been taken to World Record depths by the likes of Dave Shaw in anger v's bottom timer/depth gauge) and I have no incentive to change.

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"small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!"

The WRONG Attitude will get you killed.

"Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"

tdzao

Here is one of the products currently in development, I'm interested to see how many people would be interested in buying it.

Liquivision X1
160 x 128 full color OLED 1.65" diagonal
262,144 colors
25-50 hours of dive time between recharges, based on OLED brightness
normal BT functions, depth (4Hz to 8Hz update rate), temperature, time in seconds, avg depth, ascent/descent rate in selectable units (each field in a different color for easy distinguishing)

uploadable profiles for pre-planned deco
dive logs
Infrared PC interface included
Home development kit included -- write any deco algorithm, download any deco algorithm from open source user website
digital compass w/graphical circle display
3-axis accelerometer (thus, no buttons on the unit -- to interface with the unit, you 'tap' the unit in any of the four directions, moving the cursor around)
hard anodized aluminum casing
depth rating 350m
no o-rings, no airspaces
retail price TBD: $490-$590 USD
release date: Spring-Summer 2007

Any interest?



Eric Fattah
Liquivision Products

Mdemon

Er...yes!

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www.southwestmafia.com

"small minds talk about people, Average Minds Talk About Events, GREAT MINDS TALK ABOUT IDEAS!"

The WRONG Attitude will get you killed.

"Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"

Benthic

Looks interesting to me too......

Brian

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decoweenie

Yes.

And already have the deco program ready...

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silent running

OK, now I understand what is meant by home development and I like the idea, I think.

Excuse my lack of knowledge, but what exactly is involved in putting an alg into a computer like this? Could one buy an alg download it to say a laptop and simply download from that into the computer, or would it involve inputing many lines of code from a keypad? Or is this done some other way? Thanks, -Andy