Question for all you electronics genuises - General Accessories

I have a Cardo Scala 500 Bluetooth headset which I can only charge using the stupid plug that came with it. See picture attached.
Can any one advise me if it would be possible to convert this cable so it would give power to the carge cradle from a USB port ?
Cheers.

Well..
The USB port supplies 5v and upto 500 mA..
You've got enough current, but not enough voltage..
This MIGHT be solved by adding 6 or 7 diodes in series, but get this verified before doing it..

Is it very unlikely that 5v would be enough to run the charger ?
I have two other BT Headsets (Southwing NeoVoice and Motorola HS810) that both charge off a USB port just fine.
Out of interest, do you happen to know how much voltage a car cigarette lighter provides ?

12 to 14 volts..
Different headsets have different voltage..
5v on a 9v device is not enough..

why don't you check first what the voltage output is. maybe it is also supllied with 5v. most portables are 5v anyway just like my ipaq.

Related

2 USB into 1 mini USB charger cable?

Anybody tried charging their phone with one of these dual USB-A to one mini USB-B Y cables? They typically come with external 2.5" drive enclosures to provide enough power for the drive. It could be cool for a fast full 1 amp charge via USB when no better charging option is handy, and certainly better than the majority of crapola mis-labled under-powered chargers out there. I just can't afford to be the guinea pig if such a cable uses proprietary pinouts and will fry the phone.
amps are pulled not pushed
Ohm's law == (Amp == Volt / resistence (Ohm) )
so your charger could be 1MegaAmps and your device would only draw as much as
volt being 5volts and the resistence would be what the charging system inside
the phone is which is also a constant
all the wallchargers we use for these devices with usb connectors got plenty more juice then .5amps usb provide
Thanks for the detail. I've never been good at sorting out volts, watts, amps, etc. Regardless, I'm not concerned about it providing too much juice, mainly that it's a proprietary non-spec cable that may use a proprietary pinout. There's a guy on PPCGeeks who successfully & briefly tried a similar cable without ill effects. Waiting on a promised in-depth test to see if it actually charges faster, etc. I'm still a bit chicken to try it as I can't afford to be phoneless right now.
Well, I went ahead & tried it. I loaded nuePowerCPL which showed just under 500 mA, same as a good quality USB cable. Interestingly, a wimpy skinny USB cable delivered only 160 mA. Maybe other PCs will yield better results, but the 2 into 1 cable offers no improvement for me.
I stumbled across a product specifically designed to charge from 2 USB ports:
http://www.ppctechs.com/HTC-Touch-P...l-Sync-USB-Power-Adapter-Y-Cable_1300-440.htm
I doubt it's any different than the portable hard drive cable I tried. I also read that some newer USB implementations can supply more than 500 mA, so those with different/newer motherboards may still benefit from this charging technique. It would be great if others could load nuePowerCPL and report their results.
Have you used 5 in 1 USB cable? The USB cable can transfer data and recharge at same time. I have never used so I am looking for the highest quality possible. Also, I would like to thank you all suggestions.
Rudegar said:
the resistence would be what the charging system inside the phone is which is also a constant
Click to expand...
Click to collapse
That's not strictly true; at least some phones have two charging modes; slow (run from a USB port) and normal (when running from the wall). My Rhodium, for example, draws something like 2A when run from the wall charger. I understand that the wall charger has a slightly higher voltage than the 5v usually seen from a USB cable, and it is through this that the phone knows it can charge in "normal" mode.
Update: It works, just not enough of a difference to get super excited about:
http://forum.ppcgeeks.com/showthread.php?p=1664169#post1664169

[Q] Using high amp charger

just wondering if it's safe to use my hp touchpad charger on the gio
Wall AC to USB power adapter, which has input specifications of 100-240 Volt 50–60 Hz 0.4 Amp AC, and output specifications of 5.3 Volt 2.0 Amp DC. It is cylindrical roughly the size of a "D" battery with a foldable 2-prong AC connector and Standard-A USB socket on its two ends.
Click to expand...
Click to collapse
pretty high amperage, is it safe to charge with it? done it twice already
Standard charger have 5V output and 0,7A out. I do not recommend the use of higher voltages and currents, can lead to overcharging and thus the explosion.
The internal "censor" of the cell can and wil be fried wen you continue.
0.7 vs 2.0 is about 3 times faster, truth but also a bigger ammount in a shorter time.
If the cell not capable for that, it wil overheat and at worst case it wil blow up in your face...................
And take a second gues, those are not the most expensive celles.............

car charger for KF?

I am looking for reliable car charger for KF. Any suggestions?
It needs to output 1.8v 1.8amps .. which is more than most car adapters will support.
krelvinaz said:
It needs to output 1.8v .. which is more than most car adapters will support.
Click to expand...
Click to collapse
So, no car charging? Even slow? I mean, you can charge with 1A, slow but can do a job?
krelvinaz said:
It needs to output 1.8v .. which is more than most car adapters will support.
Click to expand...
Click to collapse
I think you are wrong about the 1.8v, my charger says 5v @ 1.8 amps, which means you could use any usb charger rated at over 1.8 amps.
stomp_442 said:
I think you are wrong about the 1.8v, my charger says 5v @ 1.8 amps, which means you could use any usb charger rated at over 1.8 amps.
Click to expand...
Click to collapse
Meant to say 1.8amps not volts. Most car adapters are 1amp or less. Many car lighters (the socket) max out at 1amp. Utility plugs may go higher, but the charger plug you use itself needs to support it.
You are right about the 1amp though, anything over 1amp will cost quite a bit more than the few dollars a 1amp adapter costs . In that case it would be worth looking into seeing if the manufacturer of the Kindle Fire sells a car charger, but I would only use that for trips, there is no way I would leave my KF charging in an unattended automobile.
Your best bet would be to find a car charger with a USB port on it that can support an iPad 2. If it can charge an iPad, it can charge the Kindle. Tons of good options on Amazon.
Charge
Wouldnt any cigarette lighter plug with a USB connection work?
schleppy said:
Your best bet would be to find a car charger with a USB port on it that can support an iPad 2. If it can charge an iPad, it can charge the Kindle. Tons of good options on Amazon.
Click to expand...
Click to collapse
I bought the "GTMax Black 2-Port USB Car Charger Adapter 2A" from Amazon, it has two usb slots, one with 1A and the other 2.1A. Works great on my Bionic, have yet to try it w/ the kindle though.
I'm using a 2AMP charger as wel and it charges just fine. Most chargers designed for the IPAD will work well. Just make sure it has a regular USB port on it and not the apple connector
Any USB charger with a micro connector will charge it provided the KF is using less power at the time than the charger is able to provide. It doesn't have to be rated for 1.8 amps. I've used everything from a 0.5 amp Motorola RAZR charger to a 2.0 amp charger and they've all done the job. The only difference was the time required. I can't see why it being a car charger would make any difference either. My T-Mobile 1 amp car charger worked just fine with it.
Most USB chargers will work
Hi,
As others have said, most USB chargers will work. However, there is one exception that I ran into recently and its well documented on the forums here - if your battery gets too flat. e.g. you left it at home when you went away, it will need at least 5V @ 1.6A to actually recharge.
Regards

Charge 2 SGSIII's at once?

I would like to get a charging cable that has 2 Male Micro USB connectors and 1 standard Male USB connector.
These are supposed to charge 2 cell phones through one USB charger, but I've read that you might need a higher capacity charger than comes with your single cable charger.
Will the standard USB charger that comes with our phone work, or will I need a higher capacity charger?
Thanks
OKAstro said:
I would like to get a charging cable that has 2 Male Micro USB connectors and 1 standard Male USB connector.
These are supposed to charge 2 cell phones through one USB charger, but I've read that you might need a higher capacity charger than comes with your single cable charger.
Will the standard USB charger that comes with our phone work, or will I need a higher capacity charger?
Thanks
Click to expand...
Click to collapse
Our S3's can charge at approximately max 1.1amps and perhaps more on a custom rom. Our stock chargers will not likely provide enough to charge 2 S3's at that fast rate. But, instead it will likely charge both at half that rate. So. I would get a charger that can handle more than 2amps...preferably 3amps so that there is plenty of headroom especially if the charger specs are over-rated. The S3 will only use what it needs and of course, it will slow down the charge as it gets closer to being fully charged. Also, note that if the USB Y-cable or splitter is not wired correctly, then it may not charge at fast rate.
themadproducer said:
Our S3's can charge at approximately max 1.1amps and perhaps more on a custom rom. Our stock chargers will not likely provide enough to charge 2 S3's at that fast rate. But, instead it will likely charge both at half that rate. So. I would get a charger that can handle more than 2amps...preferably 3amps so that there is plenty of headroom especially if the charger specs are over-rated. The S3 will only use what it needs and of course, it will slow down the charge as it gets closer to being fully charged. Also, note that if the USB Y-cable or splitter is not wired correctly, then it may not charge at fast rate.
Click to expand...
Click to collapse
Thanks. Where can I find a 3 amp charger?
OKAstro said:
Thanks. Where can I find a 3 amp charger?
Click to expand...
Click to collapse
I have a usb 2amp cigarette lighter charger and it has 2 usb ports for charging and charges my S3 and an HD2 together at fast rate when I use proper usb cable(s).
On a 2sec Google search, I found this 3amp usb wall charger (2amp + 1amp) example...or this Scosche 4 port 4amp wall charger although it says each port is limited to 1amp max. You can always put in a USB Y cable making 2 ports merge into 1 yielding 2amp max output...if necessary.
Here is a 2 port x 2.1amp per port example..which would give you maximum headroom and might work well for more demanding tablet devices etc.

Charger question.

My phone came with a 500ma 5v charger, I seemed to have misplaced it, I have a spare 500ma 5.2v charger at home, Is it safe to use it? Will the extra 0.2V have any adverse effects?
Thanks
Probably OK,
I would say it is OK for most part. Usually, AC/DC adapters are not that precision. You can check voltage output with ohm meter under load for actual voltage output.
Simple way to fix is connect 5v zener diode for quick voltage control between + and -, if your device battery is Lithium battery that is sensitive to input voltage. Check device specification for battery type. You can get zener diode from Radio Shack or electronics part store.
@rhanxdad: good reply but I'm afraid I'm only one of few people in this forum section who understood what you meant Not everybody has EE or electronic hobby background
Here is my take on this. Your battery is 3.7-3.8V, and once you plugin that 5.2V charger into micro-usb (5V standard) interface of your phone conector it depends on tolerance of its input of the internal converter chip (5V -> 3.7V for charging). This can't be guaranteed and will vary between phones, just my guess. Considering your have 500mA charger, I can also guess you don't have the latest brand name smartphone where most of them use 1A-2A chargers. Another thing, everybody makes 5V micro-usb wall chargers, and the fact that you have one rated at 5.2V sounds like some cheap ebay part? So taking all this into consideration, I would probably stay away from that charger. Look up on Amazon, you can find a nice one under $10, like from Anker or Ravpower.
Final Answer
@vectron, yes your answer is better, haha. Sorry about the ambiguous answer.
@aqswde123, How is this, if it is only 5v, then connect to Laptop/PC USB through your Sync cable. You probably already own this and then it will be free.
Good luck.
Thanks guys, will order a new charger and will use my comp to charge it in the meanwhile. After starting this thread I have been googling and I've read that the usual USB tolerance is between 4.75 - 5.25 V and hence anything inbetween is safe, but i wont take the chance anyway.

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