USB Charging I-Pad
Printed From: Avidyne
Category: Avidyne General
Forum Name: IFD 5 Series & IFD 4 Series Touch Screen GPS/NAV/COM
Forum Description: Topics on Avidyne's IFD 5 Series and IFD 4 Series Touch Screen GPS/NAV/COM
URL: http://forums.avidyne.com/forum_posts.asp?TID=607
Printed Date: 05 May 2024 at 10:29am
Software Version: Web Wiz Forums 12.01 - http://www.webwizforums.com
Topic: USB Charging I-Pad
Posted By: Leonard
Subject: USB Charging I-Pad
Date Posted: 19 Mar 2015 at 1:52pm
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540 will not charge or will the i pad show a charge from the 540. Are there any settings that we overlooked? BTW this weekend using the pad with the pilots guide on Ibooks when I went to Remove the usb connector from the 540 to the pad the connection was very very difficult to remove. Once remove (power off then on)used the update stick to see if the 540 would recognize the connection and all seemed to work fine. Any suggestions? Thanks
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Replies:
Posted By: roltman
Date Posted: 19 Mar 2015 at 2:37pm
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The iPad doesn't comply with the true UBS standard and while the IFD540 from what I've read will output 10watts at the UBS plug, this will not be sufficient to show a charge on some of the latest iPads which now require 15watts. That said, just because the iPad does not show a charge does not mean it is not charging. A 15watt iPad mini will charge just fine, albeit longer, on a the USB 2.0 standard output of 2.5watts or the USB 3.0 standard of 4.5 watts. This charging topic is covered quite extensively on the Apple forums. Apple just does a <profane word> job with their products when standards are involved. Not saying you couldn't have an issue, but did your iPad actually discharge or did the battery level increase while it was plugged in even if it didn't say it was charging? |
Posted By: DH82FLYER
Date Posted: 19 Mar 2015 at 3:24pm
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The latest iPads require 10 watt chargers and therefore the 2.1 amp output of the IFD'S USB is totally adequate. One earlier model of the iPad was supplied with a 12 watt charger but never 15 watts. See the following..... https://discussions.apple.com/message/24548751#24548751" rel="nofollow - https://discussions.apple.com/message/24548751#24548751 |
Posted By: Royski
Date Posted: 19 Mar 2015 at 3:53pm
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FWIW, my 540 charges my iPad just fine. That rubber cover on the USB port is kind of annoying though. |
Posted By: Leonard
Date Posted: 19 Mar 2015 at 10:43pm
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Thanks guys, It's an IPad air and it discharges while pluged in. I knew that it wasn't maintaining a charge while pluged in but never noticed that the green battery light while plugged was not on and the connection wasn't even maintaining the pad. The cord being used works in other situations and is straight from apple Straight from the IFD guide The USB port on the front of the IFD bezel is a USB v1 .1 compatible USB port and can be used as a “high power” charger as well. Most devices are “low power” devices and they will fully charge from the IFD bezel USB port. Some devices are “high power” devices and need up to 2.1amps of power – these devices can also be charged from the IFD USB port. The iPad is a good example of a “high power” device and the IFD supports charging. Is there a thingamajiggie that I could use to confirm power supply from the IFD? |
Posted By: oskrypuch
Date Posted: 19 Mar 2015 at 11:09pm
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Just plug in your phone, or any other standard USB device that accepts charging. * Orest |
Posted By: mfb
Date Posted: 20 Mar 2015 at 9:50am
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What's the bus voltage on your airplane - 12 or 24 volts? Figure 4.11 of the IFD540 Installation Manual says that if the input voltage to the IFD540 is less than 18 volts, the USB port drops from high power to low power charging. If the input voltage is less than 12.75 volts, the USB charging port is turned off If you have an older airplane with a 12 volt electrical system your normal bus voltage will be around 14 volts. So you should be able to charge a low power device from an IFD540. But you will never be able to charge an iPad. Mike |
Posted By: Leonard
Date Posted: 20 Mar 2015 at 10:05am
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Thanks Mike, It's 12v. Only in cruse will I get voltage over 12.75. I'll look at that section. Thank You for the explanation. Leonard
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Posted By: mfb
Date Posted: 20 Mar 2015 at 10:15am
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That's what I figured. It's too bad that this information is so obscure. You shouldn't have to dig through the installation manual to find it. Mike |
Posted By: ddgates
Date Posted: 20 Mar 2015 at 10:43am
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I carry a 15600 mAH power brick with me in my flight bag for that purpose. It puts out either 5V, 1 Amp or 2.1 Amps, and will charge an iPhone about 3 times, or an iPad from dead battery once. Cost about $20. David G.
------------- David Gates |
Posted By: Leonard
Date Posted: 20 Mar 2015 at 11:33am
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DDGates Yes but I'll just go (or have gone) back to what I've been using. A plug on the left cockpit floor with my short cord which keeps it out of the way of the panel. The IFD's USB for power isn't as nice as you would think (at lease for me). The power cord from the IFD reminds me of one of those thingamahangs that people put on their rear view mirror (may look good to the beholder but always getting in the way). LOL Leonard
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Posted By: Leonard
Date Posted: 20 Mar 2015 at 11:38am
+1
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mfb wrote:Posted By: AviJake
Date Posted: 21 Mar 2015 at 11:05am
Agreed. That's why I added this section to the Rel 10.1 version of the Pilot Guide:Low Power Operations
The following actions are taken as input power is reduced to the
IFD:
Function is restored by rising above those voltage thresholds by
1VDC for more than 1 second. ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: Paul
Date Posted: 21 Mar 2015 at 1:14pm
| This may be picking nits but that should be low voltage operation and the actions are taken when voltage is reduced. |
Posted By: AviJake
Date Posted: 21 Mar 2015 at 1:19pm
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Hah, correct but yes, that feels like the definition of "picking nits"....... ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: pburger
Date Posted: 22 Mar 2015 at 12:23am
| Well hopefully that explains why I could only get 20% brightness on my display while making some adjustments in the hangar. My bus voltage was down to 11V at the time. My maximum value was configured to 100, but the most I could get was 20. I'll try again in the future with the engine running (and bus voltage at 14.1 or so) |
Posted By: AviJake
Date Posted: 22 Mar 2015 at 6:54am
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There are dimming bus calibrations that can/should be run that may have a real impact for you. Those procedures are in the Install Manual. ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: pburger
Date Posted: 22 Mar 2015 at 7:47am
| Yes. My installer went through that, and then I went through it myself. While on the ground my max bus voltage was 11.0V. I set the max dimming bus voltage to 11.0 V, and the max brightness to 100, and with the dimming bus cranked all the way to 11V, I only got 20% on the brightness. I took a pic, but don't have time to post it. Per your chart above, when below 11.5V, the display and bezel brightness is reduced. I can only assume that this is why I wasn't seeing 100% at full dimming bus voltage. I will try again with the engine running, and if I don't see 100% at that point, I'll raise a flag. |
Posted By: AviJake
Date Posted: 22 Mar 2015 at 8:48am
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Okay. And when you're at it, note the setting in bottom left corner - photocell or dimming bus. ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: oskrypuch
Date Posted: 22 Mar 2015 at 9:58am
As an aside, I would suggest you get a ground power unit. Small ones are fairly reasonable in price. Makes playing with the 540 (or anything else) much easier. * Orest |
Posted By: LANCE
Date Posted: 22 Mar 2015 at 9:16pm
| Just finished a 2.5 hour flight. The IFD540 was flawless and charged my Ipad Air. My Mooney Ovation has a 28v system. |
Posted By: teeth6
Date Posted: 06 Sep 2015 at 8:29pm
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On my 2 flights today, I found it VERY difficult to remove the USB charging cords from my 540 at the end of the flights. I was actually afraid either the cord or the USB connection would break. The cord went in very easily so when it happened the first time, I thought it was a freak occurence but then it happened again on my next flight. Any thoughts? |
Posted By: oskrypuch
Date Posted: 06 Sep 2015 at 9:56pm
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Is this the same cord? Do you have any other USB cords, or a USB key to try? * Orest |
Posted By: LANCE
Date Posted: 06 Sep 2015 at 11:25pm
| Make sure you are using an OEM cord for your device. The cheap ones overheat and I've noticed in other applications they are also hard to get out of the usb socket. |
Posted By: teeth6
Date Posted: 06 Sep 2015 at 11:36pm
| It was an oem Apple cord. It was the same one both times but it fits my computer with no problem. I'll try a different one just to check. It's just strange that it went in so passively. |
Posted By: tony
Date Posted: 07 Sep 2015 at 7:19am
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Just because you can use that port for charging an iPad, are you sure you should? That port is so important to the proper use (for feeding it data), I would want to protect it from anything other than what its primary purpose is...... Just sayin
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Posted By: AviJake
Date Posted: 07 Sep 2015 at 9:15am
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Never heard of these problems before. I use iPad charging capability (and phone and other device) on virtually every sortie using both OEM and aftermarket cables on multiple IFDs. ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: Leonard
Date Posted: 07 Sep 2015 at 6:07pm
Difficult removing of the usb to apple cord was noted in March 2015.
Is there any way to lower this to 11.0 or 11.25VDC from 11.5
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Posted By: teeth6
Date Posted: 12 Sep 2015 at 8:51pm
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Where did you find this note about the difficulty of removing the usb from March 2015? I see nothing about this in the new 10.1 Pilot Guide. One other question on charging is why does the iPHONE turn itself back on automatically. When charging it today in flight, I shut it off so it would charge quicker. The phone turned itself back on within 10 secs. I tried a few times with the same result. Does the 540 do something to cause this restart of an iPHONE? |
Posted By: ddgates
Date Posted: 13 Sep 2015 at 8:42am
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Every iOS device I own boots up when initially connected to a charging source. You can shut it down while charging and it should stay shut down. At least that's my experience. ------------- David Gates |
Posted By: teeth6
Date Posted: 13 Sep 2015 at 10:44am
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I agree. I am shutting it down after it is connected to the charging device and it boots back up again within 10 secs. I then shut it down again, and it boots back up again.... |
Posted By: AviJake
Date Posted: 15 Sep 2015 at 7:27pm
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Never had a problem with sticky USB connectors. Will have someone play in lab on Wed to look at the device rebooting (I presume you mean the device plugged into the IFD and not the IFD itself). ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: teeth6
Date Posted: 15 Sep 2015 at 7:31pm
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Correct. Not the IFD itself. It is not possible for me to keep an iPhone off during the charge via the USB as it re-boots back on as soon as I turn it off. |
Posted By: AviJake
Date Posted: 15 Sep 2015 at 7:47pm
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Do you see the following behavior? I just turned my iPhone off and then plugged in a charging cable which turned the phone on. I then manually turned the phone off again and it did not reboot but as soon as I pulled the power cord out, it began to boot back up on it's own again. ------------- Steve Jacobson sjacobson@avidyne.com |
Posted By: teeth6
Date Posted: 15 Sep 2015 at 8:54pm
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Negative. Plugged in the charging cable and verified charging. I then, manually turned off the phone and it rebooted back on within about 10 secs. I again turned it off with the same result. I have been seeing this behavior for a long time (I think even before 10.1) but always just assumed that I really didn't turn the phone off as I thought I did. Last flight, I watched the entire time as the phone turned off but then rebooted back on as I was watching. I repeated this a few more times with the same result. This same phone does not exhibit this behavior when charging from a computer or outlet. Jake, obviously this is not a big deal and certainly Avidyne doesn't need to be concerned about my phone turning itself back on during charging but I was just wondering if anyone else has seen it. |
Posted By: MysticCobra
Date Posted: 16 Sep 2015 at 11:05am
| This behavior would occur if there were voltage (or current) fluctuations such that the phone thought power was being removed and/or re-applied. You could try testing voltage at the USB port with a multimeter, but it's also possible that the problem only occurs when a load is present and current is flowing. |
Posted By: Leonard
Date Posted: 16 Sep 2015 at 5:48pm
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Teeth6 Difficulty of removing the ipad charging cable from 540 usb port is the First post in this thread. thought I'd have to get a slap-hammer to get it out. And I'm with Tony I use that usb port for updating ONLY
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Posted By: LANCE
Date Posted: 16 Sep 2015 at 10:10pm
| I haven't had a hard time getting a cord out until this week, an OEM Apple lightning cable. It was difficult and took a few tries. However since then the USB fob is now recognized about 50% of the time. I have to reboot at least once, sometimes more to get it to recognize now. |