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So my phone and tablet are both capable of a service called USB On The Go, which allows you to connect USB devices to the phone and tablet. Problem is, my phone and tablet can't put out as much current as a computer can.
So I fixed that.
That black box has four AA batteries, a 7805 voltage regulator, a USB port and a connection cable for my phone/tablet. It also has LEDs for status and whatnot but those serve no important purpose.
"Well, how does it work?", you ask?
Oh.
You didn't.
I'll tell you anyways.
The data and ground lines are directly connected between the link cable and USB port, and the batteries (and 7805) are connected to the positive and negative terminals on the USB port. This means the batteries are supplying the power to the USB device, and the 7805 is capable of putting out 1 amp of power, compared to the lesser amounts my phone and tablet are capable of. So now, the phone and tablet can use any USB device, assuming its compatible.
In short, its a power booster so I can use more power hungry devices.
Questions and comments are welcome!
So I fixed that.
That black box has four AA batteries, a 7805 voltage regulator, a USB port and a connection cable for my phone/tablet. It also has LEDs for status and whatnot but those serve no important purpose.
"Well, how does it work?", you ask?
Oh.
You didn't.
I'll tell you anyways.
The data and ground lines are directly connected between the link cable and USB port, and the batteries (and 7805) are connected to the positive and negative terminals on the USB port. This means the batteries are supplying the power to the USB device, and the 7805 is capable of putting out 1 amp of power, compared to the lesser amounts my phone and tablet are capable of. So now, the phone and tablet can use any USB device, assuming its compatible.
In short, its a power booster so I can use more power hungry devices.
Questions and comments are welcome!
Category Artwork (Digital) / Abstract
Species Unspecified / Any
Size 1280 x 960px
File Size 402.7 kB
Oooooooooooooohhhhhhhh! That actually helped me with one of my ideas. I was making an external battery pack for my iPod and I just connected a USB port directly to 4 AA's. I already knew that 4 AA's output 6 volts which is one volt extra than needed, but I figured that since It's only gonna be used on an iPod (which can handle up to 30 volts) it will be OK. At first it worked great and was charging OK, then I noticed the battery meter was going down on my iPod even though it still said it was charging. After seeing this and reading that you used a 7805 voltage regulator in it, I looked it up on Google and saw a YouTube video showing what it does and how to use one.
hehe glad i helped, then :P
one thing that helps me remember stuff for 78xx voltage regulators is "in, ground, out", im referring to the pinout when looking at the face of the part. something simple like that helps me never forget it. and the two numbers after the 78 always denote the regulated voltage.
glad to hear you got your charger working though :3 my thing here can double as one.
one thing that helps me remember stuff for 78xx voltage regulators is "in, ground, out", im referring to the pinout when looking at the face of the part. something simple like that helps me never forget it. and the two numbers after the 78 always denote the regulated voltage.
glad to hear you got your charger working though :3 my thing here can double as one.
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