I was wondering......i know computers can give electricty through USB, but can they recive it through a USB port?
Posted by mythbusterma 10 years ago | last reply 8 years ago
Is there anyway to convert rs232 to usb, even to db25 without the need for fancy chips?I can spare a 2313 if i have to, or even an atmega8 for the cause, but I NEED a way to convert the USB signal to RS232 levels. (To program other avrs via usb =D)
Posted by tyeo098 11 years ago | last reply 11 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 | last reply 7 years ago
Usb male - male cable to connect 2 computer without a 'bride'
Okay so my plan is to build a usb heater for the contest, so it can heat up coffe, hot chocolate, of tea. i am wondering if there is another way of building this than to use a cpu and resistors. any information will help. thanks!
Asked by Hackrtanman 8 years ago | last reply 8 years ago
Would it be possible to buy a 4x AA battery relay from Radioshack and splice the output into a Micro USB cable to make a 6 volt emergency charger for a smartphone? Or do I need little electrical bits (resistors or somesuch) in between the output from the juice pack and the +5v pin on the USB? Thanks.
Posted by Miriax 7 years ago | last reply 7 years ago
Here's an idea for those USB connectors in hard to reach places. main site: http://www.flipperusb.com/ press: http://www.electronics-eetimes.com/en/reversible-usb-connector-fits-into-ports-either-ways.html?cmp_id=7&news;_id=222902730 video: http://www.youtube.com/watch?v=jQr7_R-3SHM contact info: http://www.flipperusb.com/flipper-contact.jpg Not my idea, saw it recently in eetimes.
Posted by backtalker 8 years ago | last reply 8 years ago
I got a USB cable fro the dollar store today for, well, one dollar. I was wondering if there was a way I could control the voltage output from my computer. I stripped the cable (it was male to male), and tested the output with my multimeter, too. I am getting about 5vdc, is that normal? I thought I got more out of the USB port. Like I said, I was wondering about any opensource usb control program I could use to control the USB voltage. Is this even possible? Also, I can't program AT ALL, or understand it, either.(if it matters)
Posted by John Smith 11 years ago | last reply 11 years ago
Hey i saw some videos on diy usb fan, thought it was a great idea, so i tried to make one too for funso i took my old broken logitech usb mouse and cut it open, however when i opened it i saw black, white, red, green, a string, and a copper wire - like the picture on the imageshack link (sorry for the blurr)http://img144.imageshack.us/my.php?image=dsc00210dk5.jpgso i still only use the red and black wire right? and in what conditions should i not use the usb for powering (such as the product uses more than 500 milliamp?)and just out of curiosity does any1 know whats that copper wire with no shielding is for?thanks
Posted by aman0 11 years ago | last reply 8 years ago
I want to make a usb charger with 3 ports in which I can plug my laptop adaptor (16v, 2.5A)and charge my phone and other usb devices. I am planning to use a Lm-317 to regulate the voltage. Will it be fine or I need to consider something else also? And please don't tell me I can buy one!
Asked by Ahtasham Ahmad Mohtashim 4 years ago | last reply 4 years ago
After finding out that my "high speed" satellite connection was only on down speed I now have 2 usb phones that I originally bought for Skype. What can I do with them now? Do I just throw them away? Does someone else want them? email@example.com
Posted by dhotrum 10 years ago | last reply 10 years ago
Hi, Last summer I made a solar charger(maybe I'll post some pictures), I used a 5v 320mA solar panel, 5V regulator and a USB port. So now I can charge my cellphone and mp3-player through USB. This works fine, but I would like to make an USB battery that I can charge and take with me.. Something like this http://www.dealextreme.com/p/rechargeable-usb-emergency-power-backup-pack-2400mah-3060 I have no clue on how to make this. Can anyone help me with this ? I have some li-poly batteries so I would only have to know wich electronics to use and how to solder them :) The battery pack should be charged through USB and have and USB output :) Thanks in advance, Niels
Posted by D-Nelis 7 years ago | last reply 7 years ago
I am building a small crank-powered generator for a college electronics class that will power a USB port. I know a USB port supplies 5V DC, and that my generator will obviously produce AC current, but I'm not sure the best way to convert AC to DC, then how to step my voltage up to 5 volts. My generator uses 6 wire coils in a circular pattern. 12 neodymium magnet rotate over the coils. This doesn't seem like the most efficient design ever, but that part is a stock university kit, the wiring is up to me. I've only been able to test each coil at a time, and each one produces .5-.7 VAC. Do any electricians out there have some tips? When all is said and done, I'll definitely be posting an instructable on this.
Posted by fortneja 10 years ago | last reply 8 years ago
I have probably asked enough dumb questions already but I think you could do this. I have an old TV remote control. If I would split it open and disconnect the IR and solder a USB cable to it would it work on the computer? (I would have put batteries in it too.) A program would control the remote.
Posted by popit 11 years ago | last reply 8 years ago
Hi everybody! As sais in the title of the topic, I want to realize a USB heater. Let me introduce you to what I think. Last week, I was in the store near high school with some friends, and one of them told me : "It would be cool if we could heat up things in high school, to have like a mini oven directly in our locker, working with battery." Of course, the idea is not to install a oven in our locker, firstly because it would need an incredible battery, and secondly because it would be pretty dangerous.... So here is the idea : the goal is to heat up at least 2 chocolate breads at 60°C. The heating time is not very important, but it has to be under 40 minutes (a system will start the oven before our break). But here is not the most complicated : the oven has to get its power from a usb power bank(I can plug in 2 power banks if necessary). To conclude, I have to fin a solution to heat approximately 1.5L,( but most of it is filled with air), at 60°C, with a power of a maximum of 20W. I saw things to heat coffee by USB, would it work if I take the heating pad? Also, I would like to know how much power I can get from a power bank (in W), before it to heat too much.
Posted by Romdu421 2 years ago | last reply 2 years ago
I have a 1.2 V nimh battery and a 3.7V li ion (no protection circuitry) battery, which would add up to 4.9V if put in series. However, I want to turn it into a temporary USB power supply (5V) so ignoring all the things regarding putting 2 batteries of different capacities together, is there a way to kick the voltage up a tiny bit? I was thinking something like filtering the output of a joule thief, possibly. I also have a solar panel (4.5V, ???A) and was wondering if that could help, but I don't want to rely on it too much.
Asked by .Unknown. 8 years ago | last reply 8 years ago
For wireless internet on a laptop is cardbus faster than usb?
So Im not sure this is the right place to post. But please bear with me and forgive me if its the wrong place. Thanks! (Oh, and sorry this message is so long. I wanted to be extra thorough. :))Hi,My names Emily and Im in a band. Were a three piece: weve got a keyboardist, guitar/vocals (me), and a drummer. On the 28th we have a Battle of the Bands where were playing 4 songs. One of them, a new one, has just recently been recorded/mixed. On the recording, where weve worked very hard on getting it to sound very good, theres a sort of sparkly background melody thats going on behind the normal parts that was added in the mix. Since then, weve grown very attached to these sparkly noises. However, everyone has their hands full (quite literally) and cannot play the sparkly noises at the same time. We had to find a way to automate the noises playing.So, today we had a practice and we decided to try to get these sparkly things going. We did find a very unorthodox, time consuming and temporary way after a lot of time wasting. Our way of getting it to work involved getting a separate laptop, plugging it into the PA (the speakers, that is, for those who are less learned in audio), attaching a USB keyboard to the laptop, make a loop in the best way we could of the sparkly noise, and leaving the screen open so that the keyboardist could with his toe hit the spacebar to make the sparkly melody play. This method had a couple disadvantages:1) We simply cannot continue to use this USB keyboard. We only have one USB keyboard in my house, and its used on a computer that has no PS/2 ports. So I had to put it back today, and we just need another solution.2) The keyboardist kept accidentally hitting other buttons/the mouse pad when we used the built in laptop spacebar, making the automation stop, pulling up some weird program, etc. This was why we switched to the USB keyboard. However, he still occasionally hit the wrong button, caused problems, etc. We could, in theory remove all the buttons except for the spacebar on the keyboard, but like I said, I have to return the keyboard and I dont want to ruin anything.3) A KEYBOARD IS BULKY, can break, and looks weird on stage. We have a complicated enough set up already and this simply adds to the issue. I have no problem using an extra laptop, but the keyboard has to go!The solution:This is where you come in! My hope was to try to rig up a modified staples easy button, a keyboards sustain pedal, a Rock Band (the game) pedal, etc. (any sort of pedal) and just make it so that you just plug in the device and you have an assignable button. (In this case, a spacebar.)Im on a tight budget.Any ideas?PS: If youd like to hear the effect/song Im talking about, please go to www.power-pirate.com (my bands website), go to Music, listen to the â€In Mind (DEMO)â€ mix. Feel free to skip to the chorus, the part Im talking about starts at 1:04.PPS: When I posted this text into the message body box, all my apostrophes turned into weird special characters! So yes, I do know basic grammar, but my computer doesn't. Sorry about that :p
Posted by emilyguitar 10 years ago | last reply 10 years ago
I've got a challenge. Will anyone try to figure out how to make usb headphones? i was looking at the razrs and thought about it, you'd need a driver on the phone and i wont be able to figure that part out. I was searching this site and saw posts on making headphones and thought someone could do it here. I want it so i can listen to music on my phone and razrs dont have an in/out audio.
Posted by Vivisectionnnn 12 years ago | last reply 12 years ago
I posed a problem regarding my TV Tuner card for which i got a very nice solution and my problem is solved. I have Two more problems. Yesterday i got a new detachable Hard disk with a capacity of 160 GB I have partitioned into two. Say D rive and H drive. Whenever i plug in my divice one of the USB port in the computer, i get a message lke this " Hi-SPEED USB Device attached to non Hi SPEED Hub. The recommendation is The USB main Storage Device will function at reduce speed. You must add a High SPEED USB Controller to the Computer to obtain maximum performance, Kindly let me know whether it is a software problem or a new hardware has to be installed.. Further when i referred to the CD i got along with the Motherboard, it says USB ports with a speed 2.01 will support if i have SP1 and above. I have already having SP2. Kindly advice me. Secondly I am not able to open D Drive. When i attempt, I get a message saying that it is not it is not accessible. How to open this d drive How can i format the the new hard disk. I have no file or folder in the new hard disk. Regards, Bala TV
Posted by balatv44 11 years ago | last reply 11 years ago
PLEASE HELP. i am trying to find a way to install some usb ports in my car to be used as power supplies for various devices (mp3, nav systm,phone).Â i hate clutter, so i'm trying to stay away from adapters for the cigarette lighter plug.Â im pretty sure i need to reuce the volts and amps so i do not harm the devices.Â please help. i dont even know where to begin.
Posted by lvlaveryk 10 years ago | last reply 10 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 10 years ago | last reply 10 years ago
I have a usb keyboard. somehow the usb cable is disconnected from the keyboard. I opened the keyboard. USB cable has 4 wires (1 blue, 1 orange, 1 white and 1 green). The circuit board has code like C, V, D and G. Now which one is for which wire? out of C,V,D and G which is for ground, which is for VCC and which is for Data+ and data- the color code of USB cable I know. But cannot understand which wire to connect which code (C,V,D,G) of circuit board?
Asked by jpsarkar 10 years ago | last reply 3 months ago
My lexar 8gb thumbdrive sometimes works and some times it says usb device not recognised HELLLLP i am using windows 7 enterprise if that helps
Asked by The nerdling 7 years ago | last reply 7 years ago
I recently (2 hours ago) made a case for USB drive because the case "broke" off. Anyway, my main USB ports on the front are on the bottom, with a stiff port cover over them. This makes it virtually impossible to use my USB drive now, as I cannot fit it in the tight space. So I want to use one of my 4 ports on the back. My problem is that when I plug the USB drive in, it just will not recognize it. I tried it it in my mouse port, keyboard port, everything. I tried it with another USB drive to make sure I just didn't ruin my first one; it wouldn't recognize it either. Maybe I'm missing something, or being ignorant, but I can't seem to figure out why it won't recognize it, and what can be done about it. Is there some menu like in the Control Panel (though I checked) that enables the ports, or what? I really to have to go case-less. Thanks! Edit - I'm running Windows XP Home.
Posted by Bran 11 years ago | last reply 11 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 8 years ago | last reply 8 years ago
I'm obsessed with USB powered gadgets, but i'm not sure what the USB current limitations are, I know that the power output is about 5v, but i dont know if i can attach gadgets that uses less or more voltaje, so I was wondering if anyone here can give a piece of advice about what can or cant I do with usb power.
Posted by patotec 7 years ago | last reply 7 years ago
Greetings, USB type c please? So I have spent alot of time researching different ways to light small ornament designs. I have considered EL lighting and LED, yet, in order for these lighting techniques to work sufficiently, you need 12v of power. There are Instructables to power these lightning methods per USB, however this ofcourse only provides the lightning with 5v. What I find quite surprising however is that there are no tutorials whatsoever with the new usb type: USB-C. Since USB-C can apparently provide 20v I wonder why there is little to no information available concerning these subjects. Are there technical limitations I dont know about? If not: would anyone please help me make usb-c powered led strips ^^
Posted by zeepjes 2 years ago | last reply 2 years ago
I want to wire a usb female end to my speakers so I can use the ipod connector instead of a 3.5 mm headphone jack, how would I wire it up?, the usb has 4 colored wires red, blk, wht, grn, and a bare wire. My speaker wires have 1 pos. and 1 neg. So, how would I wire the usb to work?.
Asked by bigdaddysdaddy 9 years ago | last reply 8 years ago
Basically, I want to power a small AA device from a usb port, preferably terminating in something that will fit snugly into the two-AA receptacle. I searched the archives, but couldn't find an equivalent project. Any assistance would be appreciated. Thanks.
Posted by J0ub3rt 2 years ago | last reply 2 years ago