I was wondering......i know computers can give electricty through USB, but can they recive it through a USB port?
Posted by mythbusterma 9 years ago
I am looking to use my computer to turn on and off usb devices (like a LED light) via a computer program. I know that USB devices have a constant five volts of power to their ports, and that the normal way to turn on or off a device is using a microcontroller board. I've looked into buying such a board, but they are prohibitively expensive for my project (over $30) and require high level programming skills. I know a little Visual Basic programming and that is about it. With usb devices so numerous and cheap, i am sure there must be a very cheap usb device that can be hacked. Ideally, I'd like to be able to have the computer run timed on-off events and remotely control these over the web. Any help would be great.
Asked by DarkRubyMoon 8 years ago
Can someone help me how to make usb with 2 male and 1 female usb. i can't run my alpha network adapter coz it is for a desktop computer not for a laptop so it needs more power to work.
Asked by fmaker 4 years ago
I'm sure most of you have seen the USB doomsday device usb hub on thinkgeek, I'm looking to make my own, anyone have any suggestions on where to begin? I have a usb hub so i assume ill just need to rig up some lights and switches to a box, can't imagine it'll be that tough.
Posted by Itnick 9 years ago
hi every body i think today to make a usb copier that mean a standalone hardware to get 2 usb and transfer data from one usb to other or copy the usb data to external memory am good at pic but really i dont know from where to start and what i need could any one help me
Posted by eng_mai 8 years ago
In order to switch USB connection ON or OFF as required without unplugging the cable from the PC or device.
Asked by see-saw 8 years ago
Asked by Batmanifestdestiny 9 years ago
Asked by mdishaq 6 years ago
i have a simple mp4 which needs 2 be charged frequently and my comp"s usb is spoilt so please help me
Asked by akhile1996 8 years ago
I have been told that mini and micro ports on tablets are not powered is this true?
Asked by ronarosa 5 years ago
Im planning on building myself a portable rechargeable large capacity (Ah not mAh) usb charger. Im a bit of a electrical newb but I am a mechanical engineer in training, If someone could point me in the right direction or at a good instructable that would be awesome
Asked by Douglerful 7 years ago
Is it going to harm my pc
Asked by paritoshbk 5 years ago
How would you connect the wires from a USB (female) with wires that are red, black, green, and white, to a 5V boost regulator that only had three legs - Vin, Ground, Vout? It's not for a computer so I don't think we need the green and white wires, but I could be wrong. Which wire goes where? Thanks!
Asked by mckywer 7 years ago
Every USB circuit I come across seems to be about the same with D- and D+ clamped to 3.6 volt with a zener diode. These wires are then passed to uC's io pins. Am I correct in thinking this setup doesn't take advantage of USB's differential signaling scheme? Because I thought an op-amp was needed for differential signaling. Does anyone know of a good resource, with circuit examples, that explains how USB transceivers work? I'm not interested in the actual protocol (NRZI, and all) I already understand most of that, what I'm really looking for is circuit level stuff.
Asked by hacim 8 years ago
I dont know what to do its really pissing me off theres something wrong with my computers usb drivers i think when ever i want to use a usb device i have to plug it in and then restart my computer for my computer to recognize the device and even then many devices don't work whats wrong how can i fix it let me know if there is more information that is needed. im using windows xp without any service packs
Posted by Tanners 9 years ago
I have plugged in an USB 2.0 external 2.5" drive (in enclosure) that my computer has recognized once and never again. What am i not doing?
Asked by rootedinny 9 years ago
Thinking of using a joystick on one Arduino UNO and a servo on the other, and must communicate via USB through my computer. have recently started using Arduino. I have tried to look for answers on google with no luck.
Asked by vegisen 4 years ago
I am thinking of putting one of those revolving emergency lights on the side of my server cabinet, to be triggered by voltage from a USB port on one of my HP blades. The revolving light is 12v and has a seperate power supply, so I just need some sort of USB controled switching relay.
Asked by warfrat00 6 years ago
I have some Information on this USB all documents that I would like to retrieve. it broke after one week of use & contacting the company was useless (they said just take it back to Wal-Mart and get a new one I couldn't make them understand I had information on it that I wanted!!!!) anyway when I put the USB in the computer its not being detected or it'll say reformat but when I try to reformat it says cannot be formatted. does anybody know of a way I can get the info off of it? I know I can send it to a data recovery shop but the cheapest prices I've been quoted is like 200 figured I should try here first THANKS!
Asked by JoyfullJuneBug 6 years ago
I bought an PS/2 to USB converter for my keyboard. I figured out a new problem when i was playing NFS MW i can't drive a car by using the converter. Every button has to be pressed separately, when i press a combination of steer left and accelerate button, the car moves left with a gain in speed when i release the steer left button the acceleration too stops, which is quite annoying while playing a racing game. Can anything be done to make work as it is used in normal keyboard?
Asked by formsarun 5 years ago
Hey, this is my first post so bere with me as I may be a bit all over the place. I am trying to control an LED message board via usb. It has a manual keyboard on the bottom that upon closer inspection has 8 wires on one side and 7 on the other. By placing a wire between a wire on one side and a wire on the other a character is inputed. So by using some sort of USB interface with at least 15 pins I think it must be possible to input to it via USB. e.g. When A is pressed wires 8 and 15 should be connected in order to input A, for B wires 8 and 14 should be connected, ect..... I am also getting my Rasberry Pi sonn and was thinking that the GPIO pins could do this but i'm not sure. This website documents a similar project using the same display but via a different method: http://srimech.blogspot.co.uk/2003/04/led-message-board-hacking.html Thanks for reading, please help!!!!
Asked by jacobknott 6 years ago
What free games can i download onto a memory stick that works on any computer has to be less than 4GB
Asked by busterbuster18724 6 years ago
Usb male - male cable to connect 2 computer without a 'bride'
$40 or less would be great! If not could you tell me how to make one using this http://www.allelectronics.com/make-a-store/item/KP-22/12-BUTTON-KEYPAD//1.html
Asked by crc09 7 years ago
I was wondering about some boards that use the USB B type of connectors. Is it possible for me to use them with a USB miniB type of connector if I rework the board to the miniB pinout, or is there something about the USB B connector that makes it better for these boards? One of the boards in question happens to be the Arduino Duemilanove. Does anyone know if the miniB would retain the same functionality as the USB B type connector?
Asked by KentaGrace 8 years ago