Tagged Questions

Relates to powering USB devices from the Raspberry Pi

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0
votes
1answer
46 views

Connecting a 12V USB device to Pi [on hold]

I'm planning to use a long range USB RFID reader (12V) like this with Pi. As Pi USB can supply only 5V, how can I connect it to Pi USB, if it is not external powered..??
0
votes
0answers
42 views

Pi not recognizing USB ports with an adequate PSU

So I got the Raspberry Pi B+ about 3 weeks ago and it hasn't been functioning 100% correctly... I have a PiHub to power my ehdd (1tb WD Elements), Wifi Adapter Realtek 8188CU, and (usually) the ...
0
votes
0answers
38 views

Why did my wireless USB adapter suddenly stop working on a powered USB hub after it worked for weeks?

I set up two Raspberry Pis to power a 50" television each about a month ago. On each I have Raspbian running, with slight modifications so that it boots into a Midori browser kiosk that, by default, ...
3
votes
3answers
609 views

How to use usb ports on raspberry pi?

Raspberry Pi B+ has four USB ports. But pi cannot provide enough power required for USB devices like external hard disk. Now, if pi cannot provide power, what's the use of having more USB ports? What ...
0
votes
1answer
264 views

Extra power to usb port on raspberry pi

I have a model B raspberry pi and an external hard drive that requires more power than the usb port on the raspberry pi can provide. Is there any way to increase the power to the usb port so that I ...
5
votes
5answers
2k views

Why do people use powered usb hubs?

I have the RPi B+. It has four usb ports. At the moment I am powering an Arduino Mega, a small RFID reader and a keyboard. I plan to also power a wifi dongle and an arduino uno. Will this just work? ...
2
votes
1answer
94 views

Is it possible to toggle individual USB ports?

I have a motion-detecting PiCamera set up running, which is fine and dandy until it gets dark. I could get another Pi with the NoIR camera instead, but a simple solution occurred to me the other day - ...
1
vote
1answer
88 views

RaspPi / raspbmc is turning on my TV

newby here, I have a raspbmc connected via HDMI to a CEC enabled smart TV. power is also coming from the TV via USB - everything more than fine, I really like it. BUT: When I turn off the system ...
0
votes
2answers
219 views

Power external hard drive though USB — safe to use USB charger?

I would like to connect an external hard drive to the Raspberry Pi. This hard drive must be powered through USB and comes with a cable that has two ends (to ensure sufficient power). The cable is ...
2
votes
0answers
174 views

powering pi with a 5v regulated power supply

I am considering the following 5v regulated ps module. I have a coinacceptor that connects to a board. I am going to cut the coin acceptors 12v cable and put the -ve and +ve behind the regulated ...
1
vote
2answers
206 views

Raspberry pi reboots when usb wifi (Edimax EW-7811UN) is plugged without usb extension cable

This is an odd issue that there have been quite a bit of discussion about even on this forum. Possible suggested issues range from insufficient power to bad internal hardware design of the pi. When ...
0
votes
1answer
154 views

How to connect the connect to a PiHUB?

I just got my PiHUB but there are no instructions on how to use it :( I need: To connect it to 3 USB devices, The USB devices need to be controlled by 1 Rpi, That Rpi would (preferably) be powered ...
0
votes
1answer
118 views

Are there USB powered speakers with an Analog port?

I have built a raspberry Pi Jukebox, specially modified for a handicapped user (voice feedback on all songs, large buttons) but I have one.... last.... problem. The speakers I used ran off the analog ...
-1
votes
1answer
63 views

Voltage controlled current amplifier [closed]

How to amplify current 1A, 5V from the 5mA, 5V??. More Particularly, In input side, i have 10mA and 5V and output side required 1A, 5V. Thanks.
1
vote
2answers
956 views

Looking for 3G USB Dongle (with low-power consumption )

I'm developing for my #iot project with a device, a Raspberry PI, positioned in places without any internet connectivity. So I'm looking for a really cheap internet connectivity solution; using a ...
0
votes
0answers
32 views

External USB HDD with powered usb hub

Please has somebody some idea how to fix what I described at http://www.raspberrypi.org/forums/viewtopic.php?f=28&t=47218&p=546350#p546350? It worked yesterday and today I attached a Nexus 7 ...
2
votes
1answer
83 views

Felt current on my Pi, could this have damaged it?

Here is what happened. I have a Belkin Surge Protector. I have connected my iPhone charger (5v 1A) to this and it powers my Pi. I have also connected powered USB hub, transcend hub3k to this surge ...
0
votes
1answer
53 views

RPI with GPIO connector AND micro usb Power supply?

if I use both the GPIO connector and the micro usb does this double the Amper value and the voltage value or only the amper value ?
0
votes
2answers
211 views

Safest way to power a hungry Wifi adapter and the Pi from a single 5V source

My Pi is destined for the skies, so it will receive power at roundabout 5.3V via the BEC (battery eliminator circuit) which will be capable of delivering up to 10A (heavy duty BEC it is), so sourcing ...
0
votes
2answers
59 views

Battery packs without “blip”

The Battery pack I am using for the has just one problem... plug in the pack to charge the pack itself, and it blips, rebooting the pi (not the mention shutting down most ungracefully.) Are there any ...
2
votes
1answer
98 views

Powering external hdd exclusively from sector

Hi I'm working on powering my Sony external hard drive disk. I want to power the drive from the sector and link it to the RPi without drawing any current from it (and also because i'm a afraid of ...
5
votes
1answer
2k views

Is SD card corruption still an issue? [closed]

For a project I'm using a 16GB class 10 Sandisk micro SD card (in an Adafruit micro SD card adaptor). I've got a Model B Raspberry Pi that's not overclocked, nor has it ever been. Since I'm running it ...
0
votes
1answer
437 views

Simulated unplugging of Huawei E220 USB modem

I found out that my 3G modem keeps closing the connection every couple hours. I tried to set up a reset script, everything works fine and I know how to do it, with one little problem: The only way ...
1
vote
1answer
1k views

Hard drive not detected by the Pi

My raspberry pi is unable to detect my external hard drive, I'm wondering if I might have messed up in my setup. The hub is connected to the pi in two ways: from the hub to the pi's microusb to give ...
1
vote
0answers
104 views

Raspberry Pi & Focusrite Scarlett 2i2

I'm trying to build a project which involves a Pi connected to an Arduino over USB and to a Focusrite Scarlett 2i2 over USB as well. A small diaphragm condenser microphone is to be connected to the ...
2
votes
1answer
1k views

USB stick gets very hot

I have a 32GB, USB 2.0 ICIDU USB stick that I want to connect to my Raspi for storing ownCloud files. The stick is FAT32 formatted, from factory. My Raspi is running ownCloud 6 using this image: ...
0
votes
2answers
97 views

Will customizing USB pinout help with backfeeding issue?

I am trying to make my Pi (B) work as both Wi-Fi router and NAS. Setting up software for that isn't a problem for me. But all comes down to connecting USB devices and power supply issue. Apparently ...
3
votes
2answers
4k views

What to know about powered USB hub?

I'm a bit lost in electricity stuff, but I want an USB hub to power supply my Raspberry Pi and my hard drive. I know that there are lists of USB hubs for Raspberry Pi that works perfectly, but I want ...
2
votes
4answers
186 views

Alternative ways of attaching power to a RPi

I found a nice metal case to house a Raspberry Pi for a project. It has near-perfect dimensions and properties, but it lacks space to attach a power supply via Micro USB. I think the main USB ports ...
1
vote
1answer
252 views

Need advice on completing my raspberry vehicle setup

Lets start with my goal: I want to control my raspberry pi tracked vehicle via wifi using nodejs. See the attached picture, it is awesome already. I've got the following working: rolling tracked ...
0
votes
0answers
119 views

Problem with Pi + Logitech C920 - after reboot, cam gets error - How to shutdown USB connection and restart it?

So I have a basic Pi + Logitec C920 cam setup where I want my pi running at all times taking pictures from the camera. I have finally set up to reboot the pi when it freezes. However, I have a problem ...
1
vote
2answers
1k views

4 USB camera framerate and resolution

I understand that the raspberry pi can record from USB webcams. My question is, if I use a powered hub to get extra USB ports, what kind of frame rate will the raspberry pi be able to record video at ...
0
votes
0answers
129 views

RPi shutting down after powered from 5V pin

My RPi is working fine and automatically connecting to wifi when powered from USB but when I try to power it from a regulated 5V supply on the extension headers I can see that it goes on but then ...
3
votes
1answer
156 views

Raspberry Pi Franken-charger: A Mini-B-to-Micro-B Conversion

So I go to the thrift shop around the corner, and I'm met with these two boxes in the electronics' section: I'm sifting through these one by one, tangle by tangle, searching for a power adapter ...
2
votes
3answers
2k views

Power issues when connected to tv via usb

I have attached my raspberry pi to a tv and it is powered via the tv's usb port. The problem is that the raspberry pi shuts off a few minutes after it starts up. I am fairly certain that this is a ...
1
vote
1answer
574 views

Problem with an USB extension cable powering a HDD

I have a 2.5" HDD with two wires, one for USB data and another for USB power. It works perfectly if I connect the USB power cable to the power. Now, I need to move the raspberry pi and the HDD, so I ...
1
vote
0answers
1k views

Can't connect to 3G using Sakis3G software

I am trying to connect to mobile network using USB dongle ZTE MF190 on my Raspberry Pi machine. I already successfuly established the UMTS connection directly on Pi's USB host, but later I added ...
0
votes
2answers
293 views

Mini usb power cable and ethernet connection

I bought a brand new Raspberry Pi. It came with a 5v ~ 1A power adaptor and a mini-usb cable. I plugged it in and plugged in my cat 5 into the ethernet port. The raspberry powered up but the Ethernet ...
7
votes
4answers
1k views

Long (30 to 50 foot) USB power only cable

I want to place my Raspberry Pi in a remote location to act as a surveillance camera and need to run a power-ONLY USB cable over a long distance of 30 to 50 feet. Can I safely extend a normal USB 2.0 ...
3
votes
2answers
4k views

Highest current raspberry pi can take from usb

I'm going to be working on a project from a DC power supply, and I need to know the maximum current the Raspberry Pi can handle from the USB port. I know my wall wart adapter that came with my Pi ...
0
votes
2answers
415 views

Power USB Hub from “Mains to USB” adapter

I'm thinking of building myself a small media center using a RasPi, but 2 USB ports doesn't seem enough to me. So I will need a USB Hub. I still don't know exactly what devices will be plugged on it ...
3
votes
2answers
1k views

Can you transfer data through the microUSB?

The Raspberry Pi is powered through the microUSB port. If the Raspberry Pi is plugged into a computer instead of a power transformer, could you send data through that connection? I know iPhones and ...
2
votes
1answer
299 views

iPhone charges when using tethered internet (usb)

I'm using my iPhone to provide tethered internet to my Pi. However I see my iPhone is actually charging while connected. Would anyone considered this bad for the Pi? I never figured there would be ...
4
votes
3answers
4k views

Will a 2.1 Amp MicroUSB charger be OK for the RPi?

I know the RPi needs a 700 mA MicroUSB charger, but can it handle a greater amp, namely 2.1amp?
4
votes
4answers
12k views

Powering the raspberry Pi from USB + microUSB, is it safe?

I want to power a Pi model B from a powered USB hub. I got surprised that the Pi powers on with only the USB attached. A little search in the forums confirmed me that it is a working solution. I ...
1
vote
2answers
233 views

Is the USB-Port generally faulty with the RP?

There is this saying that the USB-Port of the Pi(or the pi itself somewhere in it) had issues with synchronous data transmission, like sending and receiving data via bluetooth dongle at the same time. ...
0
votes
1answer
634 views

Raspberry Pi USB power from 5V S-ATA

I have a 3.5" HDD enclosure with external power supply. Inside I have a 2.5" HDD and there is space in there for the RPi. The problem is I don't want to have two power supplies so I was thinking to ...
1
vote
1answer
952 views

Can the keyboard draw too much power and cause damage?

I've been using a small, lightweight keyboard, fearful that one using a higher voltage would damage my Pi. Could I have invested in a better keyboard or did I do the right thing to prevent damage?
1
vote
1answer
3k views

Serial versus USB connection for RFID reader

I'm a university student attempting to make a wall-mounted RFID reader using a Raspberry Pi device and a Parallax RFID reader. I'm still in the process of planning and ordering the components, and ...
6
votes
4answers
11k views

External power for USB HDD

I want to plug my 2.5 USB external hard drive to the Raspberry Pi, however, there is not enough power on the USB ports for it to work. I've had some problems with a cheap USB AC-powered hub from eBay ...