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  • DAVE-RITE MARK ONE
    compared with other engineering plastics its thermal properties low water absorption PVC will absorb 5 of its mass total so you need to give consideration to allowances when designing mating parts its has very good machining ability PVC also has a high resistance to chemical attack PVC can also be glued using loctite 3801 epoxy adhesive Temperature considerations Scrubbers need to stay worm in cold water the CO 2 absorbent is a chemical reactions like any other if its gets to cold or to hot when you are diving its all over I based my design around using medical absorbent for its cost and ease of supply For example Baralyme barium hydroxide lime made by Allied Healthcare Products This product seams to work best around 40 C to 50 C once it drops below 40 C its ability to absorb high partial pressures of CO 2 becomes reduced As the absorbent works it produces a small amount of water which is released as steam the steam condense out in the upper air space of the scrubber breathing tubs counter lungs so if the scrubber starts to loose to match heat in to the surrounding water the absorbent becomes saturated with condensation and fails big time Loop Fittings Loop fittings are all machined out of solid PVC with fully captured O rings they are all interchangeable they screw together and can rotate through 360 degrees when assembled Electronics This was the hardest part of the job the electrical housing is made from stainless steel with 6 mm lexane window a fully captured O ring seals on all parts except the cable glands which uses a O ring compression system of my own design Miscellaneous Mouthpiece is a Dräger unit O2 cells are Teledyne R22D Hoses are boat deck filler hose 50mm 400mm Here are some additional photo s on the rig about the backpack and the webbing After the CCR diver Dave built his own oxygen booster And that s about it GOOD LUCK Well that was a nice story from diver Dave from Australia Also he was so generous to sent all design drawings available to you So if you want to use parts of this design or you want to built a complete CCR rebreather here s the design If you want to buy electronics there are several ready to use affordable solutions If you can t find any sent me a line I hereby post the original AutoCad Drawings ready for downloading If you do not own AutoCad don t worry drop me a line and I will sent you DXF files instead and a link to free downloadable software which functions as a plug in in your browser to look at these files Dave thanks for your contribution you did a great job Maybe you could sent us a dive report on a nice Australian shipwreck later to be added to this article Februari 2003 Janwillem Bech Download here the AutoCad files And here is a nice

    Original URL path: http://www.therebreathersite.nl/06_Homebuilders/dave_rite_mark_one.htm (2016-05-02)
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  • Diver Dave ECCR
    have a bad day So far I have don about 10 hours in the water with this system and found it to be robust stable and very user friendly Most of the diving I do is wreck between 0 and 120 meters deep and have no problems with this unit so far Layout The system is put together in three sections this may introduce more leak points having 4 cable gland fittings this is the best way to keep the size of the hand set down and the cost of cables low Power block The system uses two 9v batteries little square ones this way I have the higher voltage for the 12v solenoid F1 Vfet handles the higher currents to drive the solenoid which draws up to 600 milliamps The resister R20 270 ohm can be increased to give 6 volts for driving steammachine solenoid valves Amp block The amp block is fairly straight forward it uses two LM662 op amps there are cheaper amps around but I found that these ones do the job real good Cell calibration is done with P1 P2 and P3 multy turn pots Board 1 picture The board is laid out on strip board I do not have the knowledge to make real boards but this works quite well Board 1 layout Green lines are board tracks Read lines are link wire Blue lines are cuts in the board tracks PS D2 has been removed PPS the resistor numbers do not match on the layout to the road maps will update one day But I am sure you get the idea Micro board The micro board is again straight forward the micro drives the LCD directly with a 4 way COM line The programming plug is handy so I don t have to pull out the micro to reprogram it C5 must be put in otherwise the micro goes bad Picture Again laid out on strip board Layout And the LCD The left hand upper corner has been cut for the LED right hand end cut for the cable gland I get the LCD from micro zed here in Oz they come as a unit with a firm ware chip and board I don t use the chip driving the LCD directly from the micro is far more reliable then serial interfacing These LCD are easy to read under water and about the best around for the price Have a nice day Welcome to Dave Rite auto system part three Part one mechanical part Part two electronics circuits Part three programs and programming system Danger I am no keyboard monkey micro pain or cyber warrior The following program is the work of king Neptune If you use this circuit in a life support system don t blame me if you have a bad day The hart of the system is the Picaxe micro controller these systems are incredibly easy to learn and use You can down load the programming program from www picaxe

    Original URL path: http://www.therebreathersite.nl/06_Homebuilders/diver_dave_eccr.htm (2016-05-02)
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  • Uwe's IDA-71
    bailout should not be necessary for 7 m For dry diving I can change this bottle against a 2l version The oxygen bottle carries 2 liters its more than enough for two dives and I can fill it from a storage tank with less then 200 bar its also enough The BC is a wing bladder seaway com the harness is self made For O2 Mode I use a scubapro full face mask but I have also an adaptor for mouthpiece or the original Russian mask with clear glass The use of FFM compensates also the mismatch that the IDA has no water traps For ppo2 monitoring I use a Draeger Oxygauge with high ppo2 Alarm at 1 6 bar The dive time is approximately 3h limited in first line by the scrubber But I can mount the second scrubber canister I use spherasorb as scrubber material External bottles or accumulators can be fixed with a side mounted metal sub adaptor O2 diving is a fine thing but I built in 01 2003 an SCR version from this rig In the last days I also made a CCR version in Kiss Style injection valve from Gordon Smith But first I

    Original URL path: http://www.therebreathersite.nl/06_Homebuilders/uwe%27s_ida-71.htm (2016-05-02)
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  • John Volanthen C-96
    for this design goes to a number of people who I have shamelessly stolen ideas from This rebreather is not home built there are no home made parts in sight It is assembled from proven working components In no particular order thanks to Gordon Smith Rick Stanton Bob Howell Dave Sutton This is the front View The original O2 cylinder has been replaced with a DIN version I have a dumpy 3L cylinder for resurgence use and lighter 2L for cave carries The C96 has 4 reinforced areas on the sides for cutting holes in The original O2 inlet has been moved from the middle of the right hand side to the bottom right hand side The fitting is 3 8 UNF which makes connecting gas feeds easy Gordon Smith supplies fittings to convert from 3 8 UNF to Swagelok I have added an inspiration dump valve on the lower right hand side an inspiration inflator on the center left hand side and 2 Dr ä ger P connectors on the center right and at the top The side P Connector is used for the oxygauge the top P connector is used for either an ADV unit see below or a second ppO2 monitor VR3 I have added the KISS O2 injector to provide some level of automatic O2 addition This is a standard KISS Oxygen addition system with a Swagelok tap added When the unit is used in Bail out mode this tap is turned off this keeps the injector pressurized and water free without continuous oxygen injection The KISS System is at present depth limited to about 70m I am intending to change the restrictor to increase the depth capability of the unit The Top of the rebreather is shown here You can see the ADV unit This

    Original URL path: http://www.therebreathersite.nl/06_Homebuilders/john_volanthen_c-96.htm (2016-05-02)
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  • Joe's Titanium Turtle
    hard to find titanium screws and small parts but ok you can t have it all If you have any questions please contact Joe Radomski Here are the updates I recently received from Joe Radomski He fine tuned his set and added extra bottles This is how the rig is now The two larger tanks are 7 l steels with Poseidon regulators the two attached in front are 3l steels attached to quick disconnect brackets pictures at end The larger cylinders are strictly bailout diver left is bottom bailout hooked up to a high performance Poseidon 1st with a Kirby Morgan second stage the cylinder on the right is used for deco bailout I dive with a 50 50 mix The 3l on the left is my bottom diluent and the 3l on the right is my oxygen instead of using the normal Apeks 1st stages I am using DST turret and sealed The manifold I had made for me by MJ engineering I gave him the exact layout and he machined it for me Both bailout bottles have Inspiration compatible whips so I can use them for SCR use and the 2nd stages have long hoses so they can

    Original URL path: http://www.therebreathersite.nl/06_Homebuilders/joe%27s_titanium_turtle.htm (2016-05-02)
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  • El Diablo by Carlo Marcheggiani
    El Diablo If you speak Italian you could read more on his home page here http digilander iol it edirebs EDI2004fccr htm El Diablo CCR with HUD made by Carlo Marcheggiani http digilander libero it edirebs Thanks Carlo for sending

    Original URL path: http://www.therebreathersite.nl/06_Homebuilders/el_diablo_by_carlo_marcheggiani.htm (2016-05-02)
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  • Kiss Modified IDA 73
    Hydrox rebreather model IDA 73 Information can be found here Eric C Cooper from Canada bought this unit in the Netherlands and modified the rare unit to the Kiss Modified IDA 73 He will later add some comments to this

    Original URL path: http://www.therebreathersite.nl/06_Homebuilders/kiss_modified_ida_73.htm (2016-05-02)
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  • Philippe Gerin
    the Apeks DS4 as O2 addition is to be done with Gordon Smith s Kiss valve The machined Delrin plug is installed to block the ambient pressure chamber of the first stage because the system requires a constant pressure regulator An overpressure relief valve is added here since the O2 add valve won t vent the excess pressure if the regulator fails but is more likely to undergo rapid non passive disassembly as per Gordon s own words instead Button type high pressure gauge is presented here I use a Catalina 13 cuft The tank is attached with a quick release bracket on the left side of the shell The O2 feed line runs from the DS4 on the left side to the O2 add valve on the right side between the shell and the wing 3 Kiss valve The 02 addition line is made using components sourced from Gordon Smith together with the Swagelok fittings as used in his KISS rebreather It continuously injects a small trickle of 02 into the loop at slightly less than the divers metabolic use rate A manual addition button is included for the diver to replenish the loop with O2 and get back to the chosen PO2 set point 4 O2 feed I chose to feed 02 in the exhale side of the loop as it gives time to the O2 flow both continuous and manual addition to mix with the diluent I used a Swagelok fitting plugged into the fitting that was originally used on the inhale side I removed it from the inhale side as I added the ADV see below to connect the hose to the inhale counterlung The adjustable OPV is removed as the exhale counterlung features a BC type spring loaded OPV that would do its job in

    Original URL path: http://www.therebreathersite.nl/06_Homebuilders/philippe_gerin.htm (2016-05-02)
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