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12 volt battery adapter for Philips Respironics CPAP DreamStation - Printable Version +- Apnea Board Forum - CPAP | Sleep Apnea (https://www.apneaboard.com/forums) +-- Forum: Public Area (https://www.apneaboard.com/forums/Forum-Public-Area) +--- Forum: Main Apnea Board Forum (https://www.apneaboard.com/forums/Forum-Main-Apnea-Board-Forum) +--- Thread: 12 volt battery adapter for Philips Respironics CPAP DreamStation (/Thread-12-volt-battery-adapter-for-Philips-Respironics-CPAP-DreamStation) |
12 volt battery adapter for Philips Respironics CPAP DreamStation - Tech6 - 09-02-2023 Hi! ![]() This is my first post and hopefully someone has some experience on this matter. I am planning to build an adapter in order to connect my Philips Respironics CPAP DreamStation to a 12 volt battery, but as I read somewhere there is a voltage divider inside the connector which set the voltage on the center pin of the connector - or sense pin. Has anyone dealt with this? RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - Tech6 - 09-02-2023 I forgot to add a quick draw on both the PSU and the cable connector. RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - mnemon81 - 09-02-2023 I recently bought this car adapter ( https://www.amazon.co.uk/dp/B0B92X8KNQ ) which I am testing with the power station, so far so good. You could combine it with https://www.amazon.co.uk/Magiin-Cigarette-Extension-Portable-Compressor/dp/B0787TXTSY and you are sorted RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - Tech6 - 09-02-2023 (09-02-2023, 02:40 PM)mnemon81 Wrote: I recently bought this car adapter "link" which I am testing with the power station, so far so good. You could combine it with "link" and you are sorted Thank you so much mnemon81! ![]() Yes, these will do the job and I may end up purchasing one of these, but I rather build one myself if someone kindly could share the resistor values inside the connector. RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - mnemon81 - 09-02-2023 Ok, so i took car adapter apart and there is no resistor, however when I measured the resistance between both ends it showed 24.89 kilo ohm which would indicate some resistance at the tip which plugs into the dreamstation RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - Tech6 - 09-02-2023 (09-02-2023, 05:58 PM)mnemon81 Wrote: Ok, so i took car adapter apart and there is no resistor, however when I measured the resistance between both ends it showed 24.89 kilo ohm which would indicate some resistance at the tip which plugs into the dreamstation Very kind of you mnemon81! I will make a quick schematic with the 24.89 kohm resistor tomorrow Saturday when I wake up just to be sure that I got it right. Thanks again! ? RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - Tech6 - 09-03-2023 Hi again mnemon8! Now, this new drawing includes the car adapter and a series resistor as well – placed as I understand from your post – but there are a few points that would be good to know and as follow below.
RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - mnemon81 - 09-03-2023 Hiya There is only 2 wires coming from car plug. Dreamstation plug is sealed so I can only assume that resistor ≈ 25 kohm is contained within that plug between the plus and center pin. If you search for " Dreamstation 25 kohm " in google, it shows few posts with people resolving the issue, including pictures RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - Tech6 - 09-03-2023 (09-03-2023, 05:41 AM)mnemon81 Wrote: Hiya Thank you so much for all your help mnemon81! ![]() I will do a search on the 25k resistor right away! RE: 12 volt battery adapter for Philips Respironics CPAP DreamStation - Apneaway - 09-04-2023 Not sure if it is for home or car use. I use my unit with an UPS at home. This not only can provide spike protection to the unit but also power when there's a power outage. Just need to get an UPS that the beeper is able to be disabled. I believe I can use an inverter if I need to use it in my car. |