---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 12/28/16: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:40 PM - 5 Volt Converter Product Review (user9253) 2. 05:54 PM - Re: 5 Volt Converter Product Review (Jared Yates) 3. 06:15 PM - Re: 5 Volt Converter Product Review (Ken Ryan) 4. 07:12 PM - Re: 5 Volt Converter Product Review (user9253) 5. 08:20 PM - Re: Re: 5 Volt Converter Product Review (Jared Yates) ________________________________ Message 1 _____________________________________ Time: 04:40:06 PM PST US Subject: AeroElectric-List: 5 Volt Converter Product Review From: "user9253" I purchased a 5 volt converter on eBay (Item # 152124360516) and bench tested it. With an input of 13 VDC, I connected a load to the output that drew 4.6 amps. The input current was 2.15 amps. The output voltage was 5.1 to 5.15 volts depending on which meter that I used. That is within the USB standard of 4.75 to 5.25. I calculated the efficiency to be 85 percent. I could not detect any AC ripple using both a meter and a scope. The weight is 112 grams (4 oz), Dimensions are 59mm x 65mm x 22mm. The mounting holes are 54mm center to center. The seller exaggerated the efficiency, so the 10 amp output rating might be exaggerated too. Even so, this converter should be adequate for powering 2 or 3 devices. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=464454#464454 ________________________________ Message 2 _____________________________________ Time: 05:54:48 PM PST US From: Jared Yates Subject: Re: AeroElectric-List: 5 Volt Converter Product Review I just installed one that is very similar. Running two devices my ipad will hold steady, but not charge. That's with a 5a fuse on the 12v supply, which might be a little conservative. On December 28, 2016 19:47:47 "user9253" wrote: > > I purchased a 5 volt converter on eBay (Item # 152124360516) and bench > tested it. > With an input of 13 VDC, I connected a load to the output that drew 4.6 > amps. The input current was 2.15 amps. The output voltage was 5.1 to 5.15 > volts depending on which meter that I used. That is within the USB > standard of 4.75 to 5.25. I calculated the efficiency to be 85 percent. I > could not detect any AC ripple using both a meter and a scope. The weight > is 112 grams (4 oz), Dimensions are 59mm x 65mm x 22mm. The mounting > holes are 54mm center to center. > The seller exaggerated the efficiency, so the 10 amp output rating might be > exaggerated too. Even so, this converter should be adequate for powering 2 > or 3 devices. > > -------- > Joe Gores > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=464454#464454 > > ________________________________ Message 3 _____________________________________ Time: 06:15:45 PM PST US From: Ken Ryan Subject: Re: AeroElectric-List: 5 Volt Converter Product Review How many amps does it take to power a 10 inch IPad? Sent from my Android. Sorry Steve. On Dec 28, 2016 5:03 PM, "Jared Yates" wrote: > > > > I just installed one that is very similar. Running two devices my ipad > will hold steady, but not charge. That's with a 5a fuse on the 12v supply, > which might be a little conservative. > > > On December 28, 2016 19:47:47 "user9253" wrote: > >> >> I purchased a 5 volt converter on eBay (Item # 152124360516) and bench >> tested it. >> With an input of 13 VDC, I connected a load to the output that drew 4.6 >> amps. The input current was 2.15 amps. The output voltage was 5.1 to >> 5.15 volts depending on which meter that I used. That is within the USB >> standard of 4.75 to 5.25. I calculated the efficiency to be 85 percent. >> I could not detect any AC ripple using both a meter and a scope. The >> weight is 112 grams (4 oz), Dimensions are 59mm x 65mm x 22mm. The >> mounting holes are 54mm center to center. >> The seller exaggerated the efficiency, so the 10 amp output rating might >> be exaggerated too. Even so, this converter should be adequate for >> powering 2 or 3 devices. >> >> -------- >> Joe Gores >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=464454#464454 >> >> >> >> >> >> >> >> >> >> > > ________________________________ Message 4 _____________________________________ Time: 07:12:25 PM PST US Subject: AeroElectric-List: Re: 5 Volt Converter Product Review From: "user9253" Read this post about charging an iPad: http://www.matronics.com/digest/aeroelectric-list/Digest.AeroElectric-List.2012-09-17.html#MESSAGE7 There must be voltage on USB pins 2 & 3 to signal the iPad to draw more charging current. Use a voltage divider with no resistor less than 10K ohm. Below is quote from the above mentioned post: > Here's what your USB receptacle needs to provide to properly quick-charge your iPad (for iPhones, reverse pins 2 and 3): > Pin 1 (+V): 5V (no less; ideally ~5.2V) > Pin 2 (D-): 2.00V > Pin 3 (D+): 2.75V > Pin 4: Ground -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=464458#464458 ________________________________ Message 5 _____________________________________ Time: 08:20:24 PM PST US From: Jared Yates Subject: Re: AeroElectric-List: Re: 5 Volt Converter Product Review Good point, thanks! I believe those pins are shorted presently. On December 28, 2016 22:18:43 "user9253" wrote: > > Read this post about charging an iPad: > http://www.matronics.com/digest/aeroelectric-list/Digest.AeroElectric-List.2012-09-17.html#MESSAGE7 > There must be voltage on USB pins 2 & 3 to signal the iPad to draw more > charging current. Use a voltage divider with no resistor less than 10K > ohm. Below is quote from the above mentioned post: > >> Here's what your USB receptacle needs to provide to properly quick-charge >> your iPad (for iPhones, reverse pins 2 and 3): >> Pin 1 (+V): 5V (no less; ideally ~5.2V) >> Pin 2 (D-): 2.00V >> Pin 3 (D+): 2.75V >> Pin 4: Ground > > > -------- > Joe Gores > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=464458#464458 > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.