[Elecraft] Windows 8.1 Tablet Power (update)
I had asked about how to power a Unbranded (Best Buy) Windows 8.1 tablet while using the one micro USB for data as well as charging. I received several good suggestions but have found another solution. I bought a DIgi Anywhere USB/5, which allows connecting to 5 USB ports over Ethernet. It won't remote things such as sound cards but I was interested in serial ports which it does well. The tablet is therefore powered using the micro USB port and connectivity is via my local network using the tablets built in wireless to get to the serial adapters via this new device. Buying one of these thing new would be price prohibitive, but one was found on eBay (sans power supply) for a 'good price'. Mark. N2QT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
I use a Dell Venue 8 Pro and like many new tablets and phones it uses USB On The Go for connectivity. Dell sells this: http://accessories.us.dell.com/sna/productdetail.aspx?c=usl=ens=bsdcs=04sku=470-ABES#Overview and it allows what you need. USB OTG negotiates charging and data according to a set of rules which I have not figured out yet, need to research that sometime! No connection to Dell other than a satisfied user. I'm sure this is available other places as well. 73, John Payne W4CWZ On 7/7/2015 10:55 AM, Mark N2QT via Elecraft wrote: I bought a win 8.1 (not RT) tablet from Cowboom for $59, hoping to interface it using its micro USB port. However the USB port is the only way to provide power to the thing, and battery life is such I'd like to leave it on charge while operating, while not losing the USB port data functionality. The unit is sold by Best Buy under the Unbranded name. Anyone have luck powering such a tablet without losing the USB data capability? Mark. N2QT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to payn...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
Why have such seemingly simple things gotten so hard? Like nobody ever figured one would want to use and charge a device at the same time? This capability should be part of the tablet. I'd comment on how hard it is to key a radio via a computer these days but won't. 73 de Brian/K3KO On 7/8/2015 15:28 PM, John Payne wrote: I use a Dell Venue 8 Pro and like many new tablets and phones it uses USB On The Go for connectivity. Dell sells this: http://accessories.us.dell.com/sna/productdetail.aspx?c=usl=ens=bsdcs=04sku=470-ABES#Overview and it allows what you need. USB OTG negotiates charging and data according to a set of rules which I have not figured out yet, need to research that sometime! No connection to Dell other than a satisfied user. I'm sure this is available other places as well. 73, John Payne W4CWZ On 7/7/2015 10:55 AM, Mark N2QT via Elecraft wrote: I bought a win 8.1 (not RT) tablet from Cowboom for $59, hoping to interface it using its micro USB port. However the USB port is the only way to provide power to the thing, and battery life is such I'd like to leave it on charge while operating, while not losing the USB port data functionality. The unit is sold by Best Buy under the Unbranded name. Anyone have luck powering such a tablet without losing the USB data capability? Mark. N2QT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to payn...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to als...@nc.rr.com - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6081 / Virus Database: 4392/10187 - Release Date: 07/08/15 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
For $59 you must expect to not have all the bells whistles that a $300 tablet would have. They have to cut cost somewhere. 73, Dick, W1KSZ On 7/8/2015 8:37 AM, brian wrote: Why have such seemingly simple things gotten so hard? Like nobody ever figured one would want to use and charge a device at the same time? This capability should be part of the tablet. I'd comment on how hard it is to key a radio via a computer these days but won't. 73 de Brian/K3KO On 7/8/2015 15:28 PM, John Payne wrote: I use a Dell Venue 8 Pro and like many new tablets and phones it uses USB On The Go for connectivity. Dell sells this: http://accessories.us.dell.com/sna/productdetail.aspx?c=usl=ens=bsdcs=04sku=470-ABES#Overview and it allows what you need. USB OTG negotiates charging and data according to a set of rules which I have not figured out yet, need to research that sometime! No connection to Dell other than a satisfied user. I'm sure this is available other places as well. 73, John Payne W4CWZ On 7/7/2015 10:55 AM, Mark N2QT via Elecraft wrote: I bought a win 8.1 (not RT) tablet from Cowboom for $59, hoping to interface it using its micro USB port. However the USB port is the only way to provide power to the thing, and battery life is such I'd like to leave it on charge while operating, while not losing the USB port data functionality. The unit is sold by Best Buy under the Unbranded name. Anyone have luck powering such a tablet without losing the USB data capability? Mark. N2QT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to payn...@comcast.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to als...@nc.rr.com - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.6081 / Virus Database: 4392/10187 - Release Date: 07/08/15 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to w1...@earthlink.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
You should be looking for a USB-C docking adapter. It supplies power for charging and extends the USB for devices to connect. They are relatively new - there aren’t that many USB-C systems out so far, so you should expect them to be somewhat expensive. But, the adapters are available. I know that Apple sells one for their MacBook, which uses USB-C. Might be a good starting point, but keep looking to find what you really want. A standard USB hub will not provide what you need... 73, Jack, W6FB On Jul 7, 2015, at 8:57 AM, Mark N2QT via Elecraft elecraft@mailman.qth.net wrote: Actually the issue is the tablet is able to supply power to external devices, which must be disabled when the unit is being charged from an external source. Best I can tell in some devices The direction of power is either negotiated by a digital message upon connection of an external device or by shorting or opening the data lines when the unit is to be charged. It looks like Dell tablets can operate with specific adapters but there is no guarantee this would work on another brand (and lots of review comments saying it doesn't). This was all a surprise to me, I just figured I could hook things up and go. Mark. N2QT On Jul 7, 2015, at 11:50 AM, Tom tom...@videotron.ca wrote: Hmm, that's interesting. Have you tried a powered USB hub? I would think that should work. 73 Tom va2fsq.com Sent from BlueMail On Jul 7, 2015, at 10:57 AM, Mark N2QT via Elecraft elecraft@mailman.qth.net wrote: I bought a win 8.1 (not RT) tablet from Cowboom for $59, hoping to interface it using its micro USB port. However the USB port is the only way to provide power to the thing, and battery life is such I'd like to leave it on charge while operating, while not losing the USB port data functionality. The unit is sold by Best Buy under the Unbranded name. Anyone have luck powering such a tablet without losing the USB data capability? Mark. N2QT Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to tom...@videotron.ca __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jackbrin...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
Hmm, that's interesting. Have you tried a powered USB hub? I would think that should work. 73 Tom va2fsq.com Sent from BlueMail On Jul 7, 2015, 10:57 AM, at 10:57 AM, Mark N2QT via Elecraft elecraft@mailman.qth.net wrote: I bought a win 8.1 (not RT) tablet from Cowboom for $59, hoping to interface it using its micro USB port. However the USB port is the only way to provide power to the thing, and battery life is such I'd like to leave it on charge while operating, while not losing the USB port data functionality. The unit is sold by Best Buy under the Unbranded name. Anyone have luck powering such a tablet without losing the USB data capability? Mark. N2QT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to tom...@videotron.ca __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
Hi Warren, Another option would be either a Bluetooth or WiFi to serial port adapter. That way you could connect wirelessly to the elecraft and still power your tablet. Tom va2fsq.com Sent from BlueMail On Jul 7, 2015, 12:31 PM, at 12:31 PM, Warren Merkel hullspee...@gmail.com wrote: Mark, I would think the powered USB hub could work as it would provide power to devices downstream of the hub. They are not to be confused with a passive USB hub, which only passes on the power available from the tablet's USB port. Powered hubs are easy to identify as they are usually provided with a wall-wart power supply. I use one to relieve the power duties to devices connected to Raspberry Pi boards. A few catches here: One is the wall-wart is usually a switching supply which may cause harmful hash on it's own. You could replace it with an older linear regulator wall-wart in that case. The other is you might have to split out the power lines from the data lines and craft up a Y cable to allow you to provide 5V power to the tablet, and also bring out the two data lines to a cable going to the active USB hub. I'm not sure this will even work as (you are correct in that) sometimes the data lines are shorted together in USB Power Charger devices, and that is used by the connected device, to detect that the port is to be configured to accept a charging current as opposed to data mode If you can find a way to test that the tablet will charge with a wall-wort that only has two pins connected, you should be in good shape to make the Y cable. In the case of the Raspberry Pi, I have had luck with some powered hubs being able to back feed 5V on the USB data connection and actually power the Pi via it's USB dataport. This also may work for your tablet if luck is with you :) Looks like a bit of breadboarding is in your future Mark. Warren, KD4Z On 7/7/2015 11:57 AM, Mark N2QT via Elecraft wrote: Actually the issue is the tablet is able to supply power to external devices, which must be disabled when the unit is being charged from an external source. Best I can tell in some devices The direction of power is either negotiated by a digital message upon connection of an external device or by shorting or opening the data lines when the unit is to be charged. It looks like Dell tablets can operate with specific adapters but there is no guarantee this would work on another brand (and lots of review comments saying it doesn't). This was all a surprise to me, I just figured I could hook things up and go. Mark. N2QT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to tom...@videotron.ca __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
Mark, I would think the powered USB hub could work as it would provide power to devices downstream of the hub. They are not to be confused with a passive USB hub, which only passes on the power available from the tablet's USB port. Powered hubs are easy to identify as they are usually provided with a wall-wart power supply. I use one to relieve the power duties to devices connected to Raspberry Pi boards. A few catches here: One is the wall-wart is usually a switching supply which may cause harmful hash on it's own. You could replace it with an older linear regulator wall-wart in that case. The other is you might have to split out the power lines from the data lines and craft up a Y cable to allow you to provide 5V power to the tablet, and also bring out the two data lines to a cable going to the active USB hub. I'm not sure this will even work as (you are correct in that) sometimes the data lines are shorted together in USB Power Charger devices, and that is used by the connected device, to detect that the port is to be configured to accept a charging current as opposed to data mode If you can find a way to test that the tablet will charge with a wall-wort that only has two pins connected, you should be in good shape to make the Y cable. In the case of the Raspberry Pi, I have had luck with some powered hubs being able to back feed 5V on the USB data connection and actually power the Pi via it's USB dataport. This also may work for your tablet if luck is with you :) Looks like a bit of breadboarding is in your future Mark. Warren, KD4Z On 7/7/2015 11:57 AM, Mark N2QT via Elecraft wrote: Actually the issue is the tablet is able to supply power to external devices, which must be disabled when the unit is being charged from an external source. Best I can tell in some devices The direction of power is either negotiated by a digital message upon connection of an external device or by shorting or opening the data lines when the unit is to be charged. It looks like Dell tablets can operate with specific adapters but there is no guarantee this would work on another brand (and lots of review comments saying it doesn't). This was all a surprise to me, I just figured I could hook things up and go. Mark. N2QT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
Actually the issue is the tablet is able to supply power to external devices, which must be disabled when the unit is being charged from an external source. Best I can tell in some devices The direction of power is either negotiated by a digital message upon connection of an external device or by shorting or opening the data lines when the unit is to be charged. It looks like Dell tablets can operate with specific adapters but there is no guarantee this would work on another brand (and lots of review comments saying it doesn't). This was all a surprise to me, I just figured I could hook things up and go. Mark. N2QT On Jul 7, 2015, at 11:50 AM, Tom tom...@videotron.ca wrote: Hmm, that's interesting. Have you tried a powered USB hub? I would think that should work. 73 Tom va2fsq.com Sent from BlueMail On Jul 7, 2015, at 10:57 AM, Mark N2QT via Elecraft elecraft@mailman.qth.net wrote: I bought a win 8.1 (not RT) tablet from Cowboom for $59, hoping to interface it using its micro USB port. However the USB port is the only way to provide power to the thing, and battery life is such I'd like to leave it on charge while operating, while not losing the USB port data functionality. The unit is sold by Best Buy under the Unbranded name. Anyone have luck powering such a tablet without losing the USB data capability? Mark. N2QT Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to tom...@videotron.ca __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Windows 8.1 tablet power
Back feeding a Raspberry Pi from USB bypasses the fuse in the Pi. It is probably a good idea to include one in the power supply to the hub. That is how I powered my Pi. When I changed to a Beaglebone Black, the USB wouldn't work. I had to remove power to the hub and power it from the Beaglebone before I could connect USB devices. 73 Bill AE6JV On 7/7/15 at 9:29 AM, hullspee...@gmail.com (Warren Merkel) wrote: In the case of the Raspberry Pi, I have had luck with some powered hubs being able to back feed 5V on the USB data connection and actually power the Pi via it's USB dataport. This also may work for your tablet if luck is with you :) --- Bill Frantz| Truth and love must prevail | Periwinkle (408)356-8506 | over lies and hate. | 16345 Englewood Ave www.pwpconsult.com | - Vaclav Havel | Los Gatos, CA 95032 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Windows 8.1 tablet power
I bought a win 8.1 (not RT) tablet from Cowboom for $59, hoping to interface it using its micro USB port. However the USB port is the only way to provide power to the thing, and battery life is such I'd like to leave it on charge while operating, while not losing the USB port data functionality. The unit is sold by Best Buy under the Unbranded name. Anyone have luck powering such a tablet without losing the USB data capability? Mark. N2QT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
