I've been trying to set up a fast charger by splicing directly into the +5V rail of my pet project's power supply:
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Just in case any ladies coming into my apartment didn't know I was a geek.
From my own research, shorting the two data pins of a USB connection together should enable AC (fast) charging mode. Inside that heat shrink, the two data wires are stripped, twisted together, and held securely. It seems that devices ARE interpreting the shorted pins correctly - my GS3 shows "Charging (AC)" in the native battery monitor, and my 1st gen Kindle Fire with Battery Monitor Widget installed shows "AC Plugged" - but the Kindle will only pull about 700mA from the setup (it pulls an indicated 1000mA from Amazon's 1.8A charger. Don't know why it's not 1800mA, but one problem at a time). The GS3 is not compatible with current monitoring apps, but a friend's Nexus also shows more current from the Amazon charger than from my kludge.
This is an old, "5V heavy" PSU, and it's rated for 25A on the 5V rail, so there's no shortage of available amperage. I'm out of ideas. Is there anything that I've missed on how to get devices to pull max charging current?
(When I check off the "Yes, this thread is a Question!" checkbox, the forum is telling me I'm breaking the rules by posting it here, but since the first sentence of the stickied rules thread is "In general this forum should be used for questions, answers, progress reports, and tools pertaining to development boards and non-device-specific hardware.", I'm just going to ignore it. My apologies if I've misinterpreted.
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Anyone seen a cable converter to allow me to charge the Raphael from a 12V car battery when there is no access to a cigarette lighter socket?
Thus, aligator clips (or similiar) that connect to the +/- terminals of a 12V battery, and then the other end has the mini-usb connector that plugs into the Raphael. Seemingly in the middle between the two would be a 12V to 5V step down.
Anyone seen such a cable? I guess I could get a standard cigarette lighter style and break it apart and solder on some aligator clips?
um.. that would most probably result in a mini explosion that will cause your fuze to go up in flames and clouds of dark ozone destroying smoke... and maybe for you to lose a hand in the process.... I highly suggest you find a different alternative...
just my 2 cents..
go to walmart and find something like this. plugging directly to a battery is a very bad idea.
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Get a cigarette lighter extension and cut off the male end. Put gator clips on the wires to the female end. Works awesome.
Be careful to get hot and ground correct.
Try one of these adapters "Lighter Socket Alligator Clips". Obviously you'll still need a HTC (or suitable) cigarette lighter charger. Only about USD6.00.
Cheers!
Hi everyone I just have a quick question
Right now I'm overseas and the power voltage of this country is 220 v .
I forgot to purchase a wall adapter to charge my phone but luckily my cousins here all have note 3 's
Is it safe if I just plug my usb (that came with the phone) onto their wall chargers/aftermarket wall chargers ?
Here is a picture of my setup
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young_makaveli said:
Hi everyone I just have a quick question
Right now I'm overseas and the power voltage of this country is 220 v .
I forgot to purchase a wall adapter to charge my phone but luckily my cousins here all have note 3 's
Is it safe if I just plug my usb (that came with the phone) onto their wall chargers/aftermarket wall chargers ?
Here is a picture of my setup
Click to expand...
Click to collapse
This is very basic. You should always check the charger or any appliances if it has/supports 110V-240V input. Be vigilant.
All chargers have 110V-240V input range, and any usb charger can charge the phone. Check the output amps of the charger, if its lower than the stock charger then it will charge slowly, if its higher than the stock charger then it would charge fast but could damage the battery life as well. Otherwise any USB charger will works fine just after market cheap one may does short-circuit or over heat issues.
Thanks everyone
So, I had to change my original Xiaomi Redmi 4 Prime charger 'cause I lost it, and I went for AUKEY quick charger -> https://www.amazon.it/AUKEY-Caricabatterie-Caricatore-Samsung-iPhone/dp/B01AHYR04M, tempted by the possibility of charging my phone in less than the usual 2 hours.
However, I'm realizing now I probably did a bad move, since I'm reading many posts about how using a quick charger can reduce your battery life on the long run, some state they've used quick charge from the beginning (I mean right after they bought their phone) and they had to change battery or phone after one year and half more or less, not even able to reach more than 2 years, whereas some other claim they've always used a normal charger and their battery is as still good as the "old" times.
I'm thinking about sending the charger back and take a normal one, what's your opinion about it? Should I go for a charger with 2.0A in output?
R4P doesn't have Quick Charge compatibility in any case. It'd probably overheat like crazy even if it did.
Sure it has...
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... see that circle around the thunderbolt icon? That means fast charging, when I charge the phone with a non quick charger, it only appears the thunderbolt. And it's also stated in the block screen, "Fast charging".
I have a project where I am making a tablet wall mounted (and removable) together with wireless charging (QI Charging).
The tablet is purchased, which I selected specifically because it has a plastic back, and it is also easy to open up.
I bought this QI Receiver:
https://www.amazon.com/CUSORIENT-Wireless-Charger-Receiver-OnePlus/dp/B0713ST47Z
It has the best reviews about power output (the bad reviews on Amazon is about the connector breaking off which doesn't matter to me, as I will solder it internally).
This is the internals of the tablet, the red ring shows where I will place the the QI Receiver coil, and the blue is the cable routing.
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I have tested the QI receiver with the tablet using a USB cable and it works fine, it charges. But there is a heat issue. The coil gets really really hot, to hot to touch with your hand. And this worries me, as I will place the QI receiver directly on the battery inside the unit.
I have seen several projects with phones and internal qi receivers and they are all placed above the battery so it seems to work.
Still the battery inside the tablet has warning labels not to exceed 60 degrees celcius.
So I am thinking if it is possible to use either copper tape or aluminum tape on the battery to shield it from the heat, and then place the QI coil above this.
Any ideas?
I have one a friend has asked me to look at.
It is totally unresponsive
I do not know what version of the A7 it is, as I see on the forum headers, there are 2 x A7 varieties, A7 10 and A7 30.
There is no sticker on the rear, and it will not start.
It has been charged over 12 hours with correct charger.
Have tried power/volume up plus power volume down combinations, no go. Tried holding power on for 30 seconds.
Screen shows no indication of starting, no vibration motion, nothing.
I took the back off, removed the battery clip as seen on many tutorials, reattached, still no go.
Multi meter shows battery at 3.1v storage.
PC (Windows) does not recognise the tablet is attached when connected to pc...nothing happens at all on the pc or tablet.
Any guidance please, as it is well out of warranty.
Thank you
Hi,
Still no go with this.
I am trying to determine whether in fact the usb charger point is actually supplying power to the unit, thinking there may be a problem with the adapter on the motherboard?
I have tried many chargers, all with no success.
This is what it looks like where you connect the power cable to the tablet, and I was wondering if someone could tell me, what points can I put a multimeter on the correct areas to see if the connector is my possible culprit.
Can someone suggest some locations, what outputs it should display?
Battery is a L1CP3/87/100 L13D1P31 Li Polymere Charging Limit voltage 4.35VDC Capacity 3450 MaH/13.1wH. I am using a 5V charger and cable.
Many thanks
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