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Tonight's the night!
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OMyMyOHellYes Offline

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Machine: Respironics 560 Auto
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Sex: Male
Location: Texas

Post: #1
Tonight's the night!
Alrighty then. Wicked bad storms supposed to be coming through. Dog is doped up with Zanex. I am about ready to go to bed. With the storms out there, I decided to go ahead and press the homemade DC CPAP UPS into service. This is not your Best Buy or Newegg UPS. I assembled it from a small radio power supply I cranked up to 14.5 V, a Super PowerGate from West Mountain Radio and a 12 V 35 AH battery. I have some fine tuning yet to do on cables (YAY! More stripping and Power Pole crimping! So much fun!), but it is functional in current state.

Not that I expect a big outage, but with storms, particularly big thunderstorms as we see in North Texas, often the power blinks for a minute or two. Usually just long enough for me to wake up real good (I roll over waking about 3 seconds after the CPAP goes dead - at that 60 second mark I am usually WIDE awake). Sometimes it lasts for 5-10 minutes before power comes back. Sometimes once it goes out and comes back up, but it will go out again one or two more times. I am thinking this usually has something to do with a transformer somewhere in the area getting popped or maybe even a structure at a local substation, followed by a kind of reset. But what do I know? My electrical engineering education consisted of spending the night at a Holiday Inn Express while traveling on business a few years back.

I intend for this to be a full time setup once I do some housekeeping an the aforementioned fine tuning to the cable configuration. Will hit ya back up afterwards.

OMMOHY
(This post was last modified: 10-22-2015 09:51 PM by OMyMyOHellYes.)
10-22-2015 09:28 PM
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justMongo Offline

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Machine: ResMed VPAP Auto (S9)
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Post: #2
RE: Tonight's the night!
I heard you were having wicked weather in Texas.
So the power supply was, I am guessing, formerly a 13.9 VDC supply for Ham radio.
And you modified the resistor divider in the either the sense or reference side of the regulator to get 14.5 V.
I assume that was to compensate for the forward diode drop in the Super PowerGate.
(I do believe the Super PowerGate uses Schottky diodes to minimize forward drop.)

Have a good evening there...

Mongo

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
10-22-2015 10:17 PM
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cate1898 Offline

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Other Comments: Began CPAP Therapy Sept. 11, 2015. Hx Hypertension, Post Graves Disease, chronic migraines.

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Post: #3
RE: Tonight's the night!
Hope everything works well for you! It is smart to be proactive and have a backup plan at the ready. Lucky you to be so technologically minded!!

APNEABOARD - A great place to be if you're a hosehead!! Rolleyes

-------------------------------------------------------------------------------------------------
EVERY ACCOMPLISHMENT BEGINS WITH THE DECISION TO TRY!
10-23-2015 05:18 AM
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OMyMyOHellYes Offline

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Machine: Respironics 560 Auto
Mask Type: Nasal mask
Mask Make & Model: Resmed Mirage FX
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CPAP Pressure: 08.0-15.0 cm/H2O
CPAP Software: EncoreBasic

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Sex: Male
Location: Texas

Post: #4
RE: Tonight's the night!
(10-22-2015 10:17 PM)justMongo Wrote:  So the power supply was, I am guessing, formerly a 13.9 VDC supply for Ham radio.
And you modified the resistor divider in the either the sense or reference side of the regulator to get 14.5 V.
I assume that was to compensate for the forward diode drop in the Super PowerGate.
(I do believe the Super PowerGate uses Schottky diodes to minimize forward drop.)

Mongo

Voltage adjustment was easier than that. It's an Astron 12 A switching supply (SS-12). It has an adjustment pot on the side of the box. Changed primarily to feed battery during charging. However, most all the time, it will be in float mode and may not need that much.

Works slicker than owl snot when I click the switch the power supply off/on/off/on.

OMMOHY
(This post was last modified: 10-23-2015 06:31 AM by OMyMyOHellYes.)
10-23-2015 06:20 AM
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justMongo Offline

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CPAP Software: Other Software

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Sex: Male
Location: Калифорния

Post: #5
RE: Tonight's the night!
I have two Astron supplies. One is a switcher, SS-25M. And the other is a linear, RS-35M.
Sounds like last night was a success...

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
10-23-2015 07:25 AM
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parkerdt Offline

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Post: #6
RE: Tonight's the night!
I am not sure what the coefficient of slickness is for owl snot? Smile

But congrats on deriving a working backup solution!
(This post was last modified: 10-23-2015 07:56 PM by parkerdt.)
10-23-2015 07:55 PM
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PaytonA Online
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Location: Orange County,California

Post: #7
RE: Tonight's the night!
The slickness coefficient for owl snot is slicker than snot on a doorknob. That makes it pretty slick.
10-23-2015 09:30 PM
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Ghost1958 Offline

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Machine: PRS1 Series Sixty Auto Aflex
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Other Comments: Moderate to Severe SA Obstructive. Rapid O2 desat off the machine.

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Post: #8
RE: Tonight's the night!
Generator. Lol
I thought about a battery backup and running our two pr machines off constantly trickle charging batts. But gassing batteries in the bedtoom doesnt sound appealing
10-23-2015 11:11 PM
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justMongo Offline

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Post: #9
RE: Tonight's the night!
These are not flooded lead acid batteries. They are sealed gel electrolyte. They don't leak or out-gas.
Many Ham operators have very similar setups for their radios.

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
10-23-2015 11:45 PM
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AlanE Offline

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Post: #10
RE: Tonight's the night!
You guys quack me up.



Using FlashAir W-03 SD card in machine. Access through wifi with FlashPAP or Sleep Master utilities.

I wanted to learn Binary so I enrolled in Binary 101. I seemed to have missed the first four courses. Big Grinnie
10-24-2015 02:56 AM
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