Database Users

IR transmitter !

I have seen that you can create infrared transmitters with a 3.5mm jack + 2 infrared LED and connect it to your smartphone .. In this way you can use it as a remote control for the TV? <br />
What other types of devices can be created with a jack?
What other kind of things can you do with a jack?
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While I am sure that this is kind of theoretically possible, there are a few problems.
The first is getting enough voltage, you'll need ~ 1.5V to get things lit tolerably.
Real IR remotes use up to 100 mA peak current.
IR remotes work on a carrier of 38.4 to 40 kHz.
That means that your 44.1 or 48 kS/sec is not going to work, you'll need 96 kS/sec.
Even at that sample rate who says the output stage will work at these frequencies?
A serial port is a more useful way into this.
You'd still need a LED driver if you want any sort of range.

So is it possible to have an IR transmittor on a nexus 5?

Connecting two LEDs back to back across the two channels of the headphone will get you basically a frequency doubler.
You should be able to get this working with a 19 kHz carrier if the left & right channel are 180 degree out of phase.
The LEDs will light alternatively on the positive and negative peaks.
Clever.
By googling I see alot of stuff on this.
There are problems with getting enough oomph out of the headphone jack.
Somebody makes something with a battery and an amp in it, but that's getting bulky.
If you get this working, you are going to have to point it directly at the device.
The range may be incredibly small.
If I wanted something like this I would take a Raspberry Pi, stick it on the home network and have it drive an LED taped to the front panel of the A/V device.
Have your app just connect on WiFi.
At least you wouldn't have to point your Android in a specific direction nor plug in a little thingie that you always lose.
There are also pre-built solutions like this.

HERE are all the details of how you do it. Including wave files.
However, the second picture says its also a receiver, but that
is not true since the picture depics two LEDs. What is particularly
cool with that, is that it allows you to send the secret codes to
get to your TV's engineering menu (phhuh...) where you can do
things like update some TVs to versions with more features etc.
OR you can just get a phone with built-in IR LED, like the I9195, for
which when you do the magic *#0# take you to a factory test app
that include a Samsung compatible Remote control.
What would be more interesting, would be if someone could hack
the Samsung WatchON App so that we can use it for arbitrary
IR links and not just TVs.

Use Your Old Phone As A Dedicated GPS- Works Without Service

Use Your Old Android Phone As A Dedicated GPS
Using your phone as a GPS is convenient but sometimes it's not the most practical thing. I'm driving my wife to the hospital because she's in the middle of childbirth. I'm using Google maps to navigate but I also want to stay up to date with what my friends are up to on Snapchat. I'm switching back and fourth between apps and this causes me to miss a turn. As usual, my wife starts over reacting to this. I really need to come up with a solution to all of this. How can I use my old Android phone to solve the problem? I'll tell ya.
To navigate using Google maps you need three things. You'll need a phone, a data connection and a GPS chip in your device. Your old phone will undoubtedly have a GPS chip but you're probably not going to want to activate a data plan for it. That's ok because there's a workaround.
You're going to want to use a trick that saves Google maps data for offline use. Follow these simple steps to get that done.
So now you'll be able to get directions even when you don't have any data. Just mount your old phone in your car and there you have it. You've got a dedicated GPS for free. Now all you need is a dash mount and you can find some really good ones on Amazon for around $20.
Bell+Howell Clever Grip-Pro Dash Mount
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Now you shouldn't run into any issues with multitasking on your phone while driving.

Nice idea so your phone isn't tied up as a passenger in a car. But, please don't multitask on your phone while driving! I've seen too many people mangled and too much damage done by people who thought it was OK for them to do something like send a Snapchat while driving, because of course they are capable or aware enough of their surroundings.

Whooosh!
That was the sound of the sarcasm in his post going over your head.

I do use my old phone (galaxy Note 2) and ZTE blade lite as dedicated gps device on my car. Why? Because every other phone I have, gps is broken or quite poorly. That is multiple devices including LG G3, G5, Galaxy S4, Note4, Note edge, ZTE obsidian (multiple if each, some rooted, some on LineageOs others stock. I have my LG G3 on LineageOS 10 for example). GPS used to work fine on all these devices as recently as last year and one day all of them quit working or work very unreliably. GPS work very well only on ZTE Blade T2 lite and galaxy Note 2 (I have several, some rooted, some running lineageOS, various carriers) and also Galaxy S3 GPS work without exception. GPS works marginally on galaxy S7 and LG G4. Really odd thing. It appears to be related to gps chip in use? Nothing I tried on make GPS work acceptably on other phones I have worked. I tried following suggestions found on XDA, such as swapping sim card, force stopping apps using gps etc. From my experience it appears that on most older android phones, GPS quit working or working acceptably well and cannot be used as stand alone gps device any more.

Voyo VBook V1 Ultrabook Windows 10 Tablet PC released now.

Voyo has released its latest Tablet PC named Voyo Vbook V1 ultrabook with windows 10 Tablet PC. Chinese Tablet Makers now focused on the productivity laptops Now this Voyo Vbook v1 is the one of the laptops.
Voyo VBook V1 is hybrid one powered by Intel Z8300 processor up to 1.84Ghz, it has 10.1inch 1280*800 pixels IPS screen which can offer wonderful experience gaming test and video playing. What’s more, it runs Windows 10 OS, which is the latest operating system for more excellent interface, and compatibility and running better effect to let you enjoy the better experience.
Voyo Vbook V1 has RAM 4GB ROM 64GB internal storage, couple with the Cherry Trail Z8300 Quad core processor, the overall speed can be enhanced completely, and if you are a game player, you can enjoy the better and faster experience in playing games and watching videos. Of course you can download the high definition videos to store in your phone for your more convenience.
Voyo Vbook V1 has built in 9,000mAh battery which can support long time working, you don’t have to worry about the power without charging it frequently.
Therefore, Voyo Vbook V1 is a nice tablet pc with high-end performance and sell at the nice price for most customers.
And will be overcome Chuwi Hibook or
Don’t forget to share with me!
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9000mAh seems plenty Let's hope it will be an affordable option, because I like the specs and I would love to give it a try

There are so many Chinese ultrabooks coming out, they all look sleek and cost around $200.. I want to get one so badly..

Hi
Got mine two weeks ago.
I tried to dual boot Ubuntu 16.04 with windows 10, but I had an issue with Ubuntu boots in portrait mode.
I changed the GOP vBIOS or something, and now the device won't boot any more.
Just black screen.
Tried to connect HDMI cable but no luck.
Also I can't access BIOS to reset the configuration.
The device come with no CMOS battery, so hard reset will not be an option.
I left with find the device firmware (ROM or BIN) and find the boot combination keys to try the last option or RIP my device .
BR

Voyo V1 experiences
Bought one of these, Win10/Android 5.1 dual boot version.
The physical build is very nice. Massive, great craftmanship, metallic looking (but plastic) top and bottom, not bending, the hinges are strong.. to the level you need two hands to open it. It is even problematic to pick it up from the desk, it is not really offering a place to grab it.
The sound is okay, speakers are at the bottom - though I don't know why didn't they lead the sound out at the sides where it rounds up at the bottom, I suppose there would be space inside (didn't take it apart to look).
The touch pad is not very sensitive, multi touch but tends to do weird things like for example instead of scrolling (two finger swipe up/down) it resizes the window instead by docking it (under windows at least, haven't used it much under Android). It has no specific driver, so no way to fine tune it, no idea who the manufacturer is either, it comes up as standard HID device.
The flash disk is one of the slower ones (no idea again) but it's acceptable.
The keyboard however, is terrible. The island type, which would be okay, but the buttons when pressed go way under the level of the surrounding plastic mesh and the finger gets stuck, or it doesn't register the press. You can only type by finger tips, literally, which is not very comfortable at all, and especially at such a tiny keyboard. I actually took the device apart and cut the mesh out, it still looks alright but much better to type on.
Windows came activated, in english, no problems there. It switches to droid and back by a built-in app. Droid is not rooted.
The battery usage tracking is not working neither under windows or droid; it shows rapid discharge then continues working for hours at a few percent (as it thinks). It says "battery usage data isn't available" and in Windows just "Calculating..." for ever so you don't have a real clue about when is it going to shut down.
I measured with a USB charge tester and from empty it loaded ~11600mAh into it so the battery capacity is okay, the problem lies somewhere else. Charging took overnight, it takes a lot of time to load 11k by 5V/1.45A.
Under droid the sw keyboard kept popping up whenever I went to an input field - I have never had similar problem with external keyboards, fortunately "null keyboard" app offers a workaround.
I haven't found an alternative ROM for it nor have an idea how to root making it work as-is.
So considering the above I'd give it 6/10 tops.

I bought mine from Gearbest. Took two months to get. Wrong color. Case they recommended is 2 1/2 inches too small. After four hours of use it won't power up.

any other feedback on keyboard, battery indicator, sleep mode on Android ?
Thanks @MistycSr & @Funky54 for your feedback on the Voyo VBook V1 !
I must say I am tempted to buy one of these netbooks because it's cheaper (Gearbest : $208 with android http://www.gearbest.com/tablet-pcs/pp_331052.htmlhttp://www.gearbest.com/tablet-pcs/pp_323958.html or $188 without android : http://www.gearbest.com/tablet-pcs/pp_323958.html ) & lighter than the Asus Chromebook Flip (and with native Android & Windows also).
Does everybody have problems with the keyboard & the battery indicator ?
Does it run OK with android ? Does the sleep mode work OK on android ?
(I tried android on my asus t100ta , it worked good except that it would'nt go to sleep ...)
PS : after checking on another forum there is a file for a dual system (Windows & Android) installation on voyo's website : http://en.myvoyo.com/xiazai/Win%20Pad/VBOOK%20V1/down/ ... so adventurous people can save $20 if they want to install android afterwards

weight : 790gr or 1070gr ?
Also what is the real weight of it ??? most pages on the internet say it s 790gr (which would be really light !) but some pages also say it's 1070gr ...

pierro78 said:
Also what is the real weight of it ??? most pages on the internet say it s 790gr (which would be really light !) but some pages also say it's 1070gr ...
Click to expand...
Click to collapse
I found the answer : it’s 1006gr : http://win-tab.net/readers_review/voyo_vbook_v1_readers_review_1604031/
(maybe I am going to buy an asus chromebook flip as it can run android apps now …)

NO.1 G8 Multimode with removable straps

Recently, the known smartwatch manufacturer No.1 smartwatch has released a new product-- G8.
No.1 G8 is a MT 2502 watch. MT 2502 is known as the dual mode chip. You can use it as a companion device, tether with your phone, you'll receive notifications, calls. Insert a sim card, you can use it as a independent phone, so you can make calls, send messages.
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And what's new with the G8?
There are three modes in the G8. Phone, bracelet, watch. The phone mode is for independent use, you need to insert a sim card. The bracelet is for companion, you can connect it to your phone. The watch mode is for the time feature. In order to manage the battery life, the three mode setting is very convenient, even insert a sim card you can choose the watch mode, and it will shut down all the radios, so that the battery life will be much longer.
And the removable straps, you can change the straps by yourself. In the package, there will be two straps, you don't need to buy extra straps. The vivid color straps can be used for sports, and the classic black one is the business style. You can change it with your mind.
And the sports feature, it supports Heart rate monitor, Sleep monitor, Sedentary reminder, Blood pressure, Pedometer, Drink a reminder. The heart rate monitor and the Blood pressure measuring, these two features are very helpful, you can check your personal health situation. You just need to wear it and click the Measure button. Also the Sleep monitor, go to the history, comparing the different results you’ll find out how to sleep well.
Here aree some parameters of the G8.

I just got this watch recently.
USB cable for charging - special. And in my case problem with connecting to BB: SW do not see when connect to my computer. Probably usb connector or pcb problem. 8(
JFYI This smartwatch has a micro SD slot under the battery. But I'm not sure that it works.
upd. But according to the information from the insider, the support of micro SD is not planned.

i cant install face this smartwatch. How can install new face?

Is it worth it to buy the watch?

o_cilek said:
i cant install face this smartwatch. How can install new face?
Click to expand...
Click to collapse
How to install vxp face, please check this.
www.chinawatchs.com/how-to-install-vxp-face-in-no-1-g8/

ZillahGiovanni said:
I just got this watch recently.
USB cable for charging - special. And in my case problem with connecting to BB: SW do not see when connect to my computer. Probably usb connector or pcb problem. 8(
JFYI This smartwatch has a micro SD slot under the battery. But I'm not sure that it works.
upd. But according to the information from the insider, the support of micro SD is not planned.
Click to expand...
Click to collapse
Check this tutorial. You need a win 7 computer to make a firmware update.
www.chinawatchs.com/mtk-smartwatch-update-the-proper-way/

I've received mine today. Some Impressions of a few hours of usage.
Only 3 watchfaces? Are they serious? Its 2017 an storage is cheap........
Fundowear is such a pain. No support for blood pressure. Thats wat i bought it for.
By the way. measures of bP is not accurate. sytholic too high.
Since now, i think i wasted my money. I wanted an alternative for my fitness bracelet. But this is a piece of crap, i think.
But there is also a good point. The red strap looks really good.

Is it possible to change strap with metalic strap?

crocitizen said:
Is it possible to change strap with metalic strap?
Click to expand...
Click to collapse
Yes, the universal straps, 22 mm width straps will be competiable with it.

You can get free straps for your G8 here.
http://www.chinawatchs.com/free-no-1-smartwatch-strap

This watch only sends notifications from apps like Whatsapp, FB, etc that you received them. However, actual notification content is not shown. Is there a way to fix this?

Click the notifications, you can read the content, but whatsapp content will not be shown....

Cathy Hapka said:
Yes, the universal straps, 22 mm width straps will be competiable with it.
Click to expand...
Click to collapse
thanks!

noob needs help with g8 smartwatch
I just received my g8 today. 1 my laptop will not recognize it. It will make a sound when i plug it in but nothing ever pops up on screen as a new connected device. Cant locate the watch no where in the file explorer. I've tried a different USB cable but I noticed the stock mirco usb tip is longer than any micro usb that I have laying around. None of mine are long enough to make a connection when plugged into the watch. 2. The watch will not connect to my ear buds (treblab J1) it will pair but will not connect. I"m pretty aggravated, I've been up all night searching for answers. I found the chinawatch website, but I guess I'm way out of my league to update the firmware using their process. (imo its super complicated, reminds me of when i rooted my droid dx2, I left rooting alone after that, I'm not computer smart enough for that), what happened to drag and drop, plug and play?). Any tips or advice would be greatly appreciated. Signed tired and out of time.

no!!!!
Elite Gamer 141 said:
Is it worth it to buy the watch?
Click to expand...
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Any info on Pumpkin AS0171B or CN10-01202B 1 din decks?

Recently purchased an Android 6 Single Din CN10-01202B-Y0801-GS-Y0004 deck from "AutoPumpkin":
SKU: CN10-01202B OS: Android 6.0 Marshmallow CPU: Quad Core RAM: DDR3 2GB Nand Memory: 32GB Radio IC: NXP TEF6686 Amplifier IC: TDA7560 Bluetooth: BT 4.0 Working Voltage: 10.8~14.8V DC Audio output: 4*45W Max Cold Boot time: about 25s
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I think the "generic" manufacturer is Kaier (KED3-5) noted in system version, and was wondering if anyone here started testing with it yet?
They also have the same type with Android 7:
SKU: AS0171B OS: Android 7.1Nougat CPU: Quad Core RAM: DDR3 2GB Nand Memory: 32GB Bluetooth: BT 4.0 Working Voltage: 10.8~14.8V DC Audio output: 4*45W Max Cold Boot time: about 25s Screen Size: 7-Inch Digital Screen Screen Resolution: 800*480 Capacitive Touch Screen (5 points)
Click to expand...
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But I was told by their tech support the internal components are "In fact" different and the android 6 model cannot be upgraded to 7.
Currently having ALOT of software issues, even after updating to their newest V8.2.3_20170927.200111_KED3-5 firmware.
Video player keeps freezing up, VLC player is just blank screen even after disabling HW overlays. Firmware just keeps lagging and freezing up. Seems like their Tech Support just keeps making up things off the top of their heads.
The front panel LCD has unnecessary graphic segments that don't really do anything on the right and left of display, but at least the hardware buttons are not only mapable but can also be RGB'd to any color you wish.
I'm hoping someone can come up with a custom system for it that I know would run much better. (that's why we're all here on xda right?) :fingers-crossed:
Another interesting thing is the IR remote from my old RK3188 actually works (but not all buttons, just the basic volume and power) with this unit even though they told me it didn't come with one because it's not supported :silly:
My old worn out 1GB RK3188 (Eonon GA1312) is currently performing better than this unit thank's to the awsome work by Johny DJ, dsa8310 , and Malaysk!
Purchases this newer unit because the GA1312 front panel lcd cuts out and DVD drive grinds away blindly.
(but at least IMO it was designed way better than this Pumpkin unit)

Bought this unit in April with 7.1 . Having the same issue with VLC just playing audio, no video ever. The stock video player can struggle through some videos with occasional pauses and freezes. The screen looks bleached out compared to my double din android in my van. The whole system seems very laggy and takes a full 3 minutes to boot (no fast boot in this one). You have any luck with VLC yet?