Search found 5 matches

by kdauto
Fri Jul 12, 2019 6:01 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10
Replies: 32
Views: 12391

Re: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10

Have the buck converter arriving this weekend. If I get the chance to finish this installation within the next week I'll post results. My 1st attempt will be 1 buck converter set to 3.3 V and no resistor. We'll see how that pans out. Thanks. THAT has zero chance or working correctly - wait for the ...
by kdauto
Fri Jul 12, 2019 12:55 pm
Forum: CPAP and Sleep Apnea Message Board
Topic: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10
Replies: 32
Views: 12391

Re: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10

Have the buck converter arriving this weekend. If I get the chance to finish this installation within the next week I'll post results. My 1st attempt will be 1 buck converter set to 3.3 V and no resistor. We'll see how that pans out. Thanks.
by kdauto
Thu Jul 11, 2019 11:19 am
Forum: CPAP and Sleep Apnea Message Board
Topic: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10
Replies: 32
Views: 12391

Re: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10

Oh, I also missed this question, why do I need two 3.3V buck converters? I am trying to understand why one isn't plenty to supply 2 CPAPs.
by kdauto
Thu Jul 11, 2019 11:17 am
Forum: CPAP and Sleep Apnea Message Board
Topic: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10
Replies: 32
Views: 12391

Re: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10

I purchased a 10A, 240W dc-dc unit. From specs it should regulate to 24V even with varying input voltages from 11-14V. I am just about ready to click on a "buck converter" that'll give me 3.3 regulated (fixed) volts. I was going to mount all this on the roof of the underbelly near the battery area. ...
by kdauto
Thu Jul 11, 2019 7:59 am
Forum: CPAP and Sleep Apnea Message Board
Topic: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10
Replies: 32
Views: 12391

Re: Homebuilt '12V Camping Converter PSU' for Resmed Airsense 10

Question for TheSnoringMan; why is the resistor necessary at the output of the 3.3v buck converter? What is its function? I think if the Resmed unit sees 3.3V on the center "sense" wire it should work,no? I am at the same stage you were a few years ago. I jjust bought a 12-24V DC converter for our 5...