The methods for powering the Raspberry Pi (typically via its micro-USB connection.)

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11 views

Using LED strips (many!) and mutiple power sources wiring up the ground?

So I'm using LPD8806 leds with RasPi, and we are using many many lights and need multiple power sources. With one power source, we wired the negative of the power source to a ground pin on the Pi. ...
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0answers
55 views

Pi / Pi 2 using modern 'smart' USB Power Adapters to supply power to the Raspberry?

Once upon a time there was only one way to charge a usb device and that was done at 5V and 500mA max, or so I've been told. 'Modern' USB Power Adapters like the Apple 1Amp, 2Amp and 2.4Amp and many ...
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2answers
42 views

How much power can the Pi supply?

I am making a project in which I will be using an arduino to control several servo motors and LED's. And I ll be using a Rqspberry pi to control arduino. They will be connected serially. In this ...
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1answer
76 views

How do I turn off my Rasperry Pi when it's connected to a battery pack?

I currently have my raspberry pi set up such that it's connected to this assembled 320x240 2.8" TFT + Touchscreen that I got from Adafruit (https://www.adafruit.com/product/1601). I am also powering ...
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2answers
124 views

What's the problem with backfeeding?

New to the Pi, so new in fact that my very first (a B+) hasn't even arrived in the mail yet... I know that "backfeeding" or "backpowering" refers to powering the Raspberry Pi via a powered USB hub ...
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2answers
56 views

Power led randomly blinking every 1 minute on b+

I've just bought my rpi b+. Power supply for raspberry is 4.94V (which is in appropriate 4.75-5.25Vrange). Raspberry pi working good, but there is one possible trouble. I don't know why, but power ...
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1answer
41 views

external power supply to sensors

I will be using all of the following sensors at the same time on raspberry pi b+ model with 2Amp power supply. 1) DHT-11 Digital Temperature & Humidity Sensor for temperature and humidity ...
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2answers
60 views

Shutdown RPi by plugging power (SD card mounted read-only)

I setup my RPi to boot from SD card in read-only mode. Is it safe to just unplug the power in order to shutdown? Can any components be damaged? This way I could place a switch in front of my USB ...
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2answers
78 views

Would a powered USB hub for Model B work to power Model B+?

I've read somewhere that there are different power requirements for the Model B+. Question is would a powered USB hub that is currently being used to power the model B be good enough to power the ...
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5answers
304 views

Will a Duracell 9V battery power my Raspberry Pi for 24 hours? [duplicate]

Will a Duracell 9V battery power my Raspberry Pi (plus camera module) for 24 hours? I've tried power banks and the 50,000mAh rating seems a bit exaggerated, considering I'm getting just 5/6 hours ...
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1answer
28 views

What is the Raspberry Pi power supply connector called?

What is the connector on the Raspberry Pi power supply called? It looks rather like my Samsung Galaxy S4 cable. Is it the same?
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4answers
625 views

Will any external battery power a Raspberry Pi?

I am working on a project that needs the Raspberry Pi to work without a mains connection. I have considered buying a 50000mAh USB power bank. Would this power a Raspberry Pi, and if so, would it ...
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3answers
65 views

Power LED is very dim on RPi B+

if I am plugging in the power supply the red power led lights very dim. I found several guides to test the the board with a multimeter but these were for the other revisions, and it seems like B+ is ...
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1answer
70 views

My raspberry pi only have the green led on (model B+)

Yesterday I connected my RPi to the TV, but there was a problem. The red LED doesn't blink, but the green LED is on. I've change the microSD but It didn't help. I use a 700 mA power supply, and tried ...
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1answer
100 views

Current draw for + models (A+ and B+)

Essentially What's the current draw and supply voltage tolerance? but for A+ and B+
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0answers
61 views

Ext. HDD I/O Error - suspends, power issues?

My external USB HDD becomes repeatedly inaccessible after a long time of usage/idleness. The same thing happened before with a very old disk and I thought it was just failing. But I do have the same ...
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4answers
145 views

Raspberry PI A+ Power requirements

I want to get a raspberry pi a+. I am trying to figure out how I can power it. I will use it with a USB Bluetooth WiFi Combo Adapter. The power consumption of the combo adapter is less than 1.5W. As ...
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1answer
109 views

Not enough power to the Raspberry Pi B+

I have a problem with my Raspberry Pi B+. First the problem was that I didn't get the keyboard or mouse to work and I have now found out that the Pi do not get enough power. When I looked on forums, ...
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0answers
43 views

Raspbian lxde desktop misbehaving

Installed raspbian on 8gb miroSD card booted with 5v and 0.7A power supply, rpi boots well and works. when i pluged in an headphone, the cursor freezed. I restarted and everything worked well and when ...
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4answers
602 views

Can the pi power this 2.5" drive without a usb hub?

I want to use my PI model B as a NAS, but I'd like to avoid using a usb-hub. I have a 2.5" western digital 1tb usb drive (this one), and a 2A power supply for the pi that I'm planning on using with ...
5
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0answers
215 views

Running RPi on Solar Panel and battery [closed]

I’m quite new in electronic projects and so my basics are quite limited. I've been reading a lot regarding this topic (refer to the title) and I’m currently planning to buy the suitable Solar Panel, ...
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2answers
507 views

What is the best power supply for the Raspberry Pi B+?

I have read through What power supply should be used for the B+ model? to find the best power supply for the B+. I have read that if you are connecting additional things to the Pi, 1.5 A may not be ...
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2answers
168 views

Switching power source from power bank to mains without interrupt

I'm planning to build a robot similar to one described here. The pi and the controller are going to be powered from powerbank. However, as big fan of live coding I am (there's gonna be some LISP ...
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2answers
358 views

External shutdown (properly) button?

I have a Raspberry Pi that I want to mount in an enclosure. The enclosure already has a couple external buttons on it. I'm trying to find some sort of circuit that I could by that I could wire the ...
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1answer
99 views

Pi dead: U3 IC gets extremely hot

I got two Pi's, and both of them have the same problem. To the first one, I connected a 3.3V power supply to pin 1, following which the board didn't boot and no LEDs lit. The board seems to be dead, ...
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2answers
90 views

Resistor calulation for two LED

I want to connect two IR LED to the 3.3v output on the PI in series. I need to reduce the 3.3v to 3.0v. What kind and measure should my resistor be? I swear this is not a word problem from ...
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2answers
295 views

5.3v power source into the GPIO

I bought a UBEC (Universal Battery Elimination Circuit), which, for those not familiar with it, is a "5 volt" dc-dc power conversion circuit (you can get them as high as 5A). It gets it's name from ...
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4answers
97 views

Powering a stack of Raspberry Pis

I'm looking at putting together a small stack (maybe 4 - 6) of Pis to host my currently externally hosted services, plus a router and a media server. Software setup is not a problem and basic hardware ...
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1answer
119 views

raspberry pi rebooting all the time

My Raspberry Pi keeps on rebooting all the time. It boots up just fine, I can use it for some time (3 to 15min), then it reboots. Some of the things I've tried: -Changing the transformer, had a 5V ...
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2answers
351 views

Car computer how to connect to car battery and also not drain battery when the car is switched off

I am doing research on creating a car computer with raspberry pi (so I have all the basics down before I start this project) and I am looking on a way to switch the whole device automatically whenever ...
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2answers
131 views

Power supply for raspberry pi model b+

I have a 5V/1.5 A power supply lying around. Will this be sufficient for the pi b+ model?
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2answers
66 views

contact pin 1(3,3v supply) pin 6(0v ground) reboot [closed]

I want to supply a circuit with these two pins. But when they contact each other my raspberry reboot. Is my raspberry broken?
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71 views

External power supply needed to run two stepper motors?

I am following this tutorial for a CNC laser engraver (http://funofdiy.blogspot.co.uk/2013/10/a-raspberry-pi-controlled-mini-laser.html). I have got two stepper motors from some old DVD drives and the ...
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1answer
116 views

Do 5V/3A External Batteries exists? [closed]

Need one to power my PiHUB so my project gets portable, and I don't need a cable. Unfortunately the battery packs I find on amazon, are 5V/3A ad in: 1 USB 5V/2A, and 1 USB 5V/1A ... so 2+1 = 3A ...
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1answer
205 views

Portable power supply for a PiHub?

I love my PiHUB and would like to have a or table power source, so I can make my projects mobile :) Is there any product that I could use? It uses 3A 5.2V. Alternatively I'd appreciate any ...
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2answers
531 views

Powering Raspberry pi with 12 volt input

I am trying popped a transistor while trying to power my raspberry pi from a bread board. I have a 12v battery pack that I am going to use to power my raspberry pi and some servo's. Yesterday I ...
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2answers
2k views

Is it possible to power a model B+ via the 5v pins on the GPIO header?

I'm making a powered daughter board to mount my B+ Pi on. Can I power the Pi entirely through the 5v pins on the GPIO header? More importantly, can I also supply reasonable currents to USB devices ...
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2answers
98 views

5.3V power source w/ 24kohm resistor

Let me start with mention that I don't know shit about electronics. I bought UBEC to power my RPI but it had output voltage of 5.3V so I decided to use 24kohm resistor to lower it down. Now voltage on ...
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0answers
77 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 ...
2
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1answer
138 views

UPS for raspberry pi

I want to be able to power my pi like a smartphone (ie from battery or from mains (while charging the battery), hot swappable) I know there are boards like the MoPi that achieve this, but the ...
2
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2answers
230 views

Does Raspberry PI Model B+ Works Over 24*7 and 365 days continously? [duplicate]

Does Raspberry PI Model B+ Works Over 24*7 and 365 days continuously??
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2answers
660 views

Reducing 24V to 5V for RPi PSU

I'm trying to power several devices off of a breadboard. For simplicity I want to power these all from the same PSU. The highest voltage amongst the devices is 24V. I was looking to use a 24V 2A ...
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3answers
347 views

7.2V battery with Raspberry Pi

I want to use a 7.2V (4200mAh) battery with my raspberry pi but I need to convert the output to 5V (2000mAh), I tried the following formula: Ω = V / A but when I try to find the ohms the result ...
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2answers
112 views

Using battery pack as a UPS

I need to use raspberry devices as mini servers. I'll need to install ~100 of them in different locations. In those areas, electricity power offs are quite common, so I'm thinking using a cheap usb ...
5
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2answers
2k views

What power supply should be used for the B+ model?

So I'm thinking about purchasing a RPi B+ model, and the Pi website states that the power supply should output 2A through a Micro USB supply. OK, but in terms of volts what should it be? Is 5V ...
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5answers
4k 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? ...
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2answers
201 views

Using a Generic Switching Power Supply

I have a generic 5V 10A switching power supply with screw terminals, that looks kind-of like this: Is it safe to use the output from here to drive the Pi by cutting a USB cable and connecting the ...
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2answers
1k views

Preventing SD card corruption in the event of power failure

I have a project that uses Pi's in remote locations (roadside cabinets dotted around a city next to important bits of water infrastructure) to read data via USB from some specialised data collection ...
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2answers
179 views

Mult-head micro-usb cable

I am building a raspberry pi cluster. I am looking for a multi-head micro-usb power cable to power them. Does such a beast exist? Or can I make one myself?
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2answers
591 views

Is it fine to use an ASUS Memo Pad power supply on a B+ RPi?

I'm about to make my first RPi purchase (a B+) to be specific. I do not want to spend any more than I need to, and hence have looked around to see what power supplies I have that may already work with ...