Questions tagged [power-supply]

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

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1answer
5k views

Cut GPIO power on shutdown

I'm developing a project where I have a button connected to the Raspberry Pi GPIO where it sends shutdown command when pressed for 3 seconds. I also have a 16x2 LCD that outputs status messages. When ...
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1answer
92 views

Getting current source information

I am going to do a Raspberry Pi project and in order to know some system status I am going to have a GSM module to send text messages. In order to avoid power cuts (for example in a storm) I have a ...
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6answers
4k views

Powering Raspberry Pi 3 from another Raspberry Pi 3

Is it possible to power a Raspberry Pi 3 directly from another Raspberry Pi 3 that is powered from a Micro USB socket. I understand there is a 5v rail and I am thinking that linking the 5v rails ...
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1answer
3k views

Reusing a phone battery to power a Pi

I know this question might be too broad or too generally worded, but I'll ask it anyway, because I can't find it anywhere else. Is there any simple way how to convert any old phone (fully functional) ...
1
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1answer
87 views

Powering multiple Pis and HDDs — reducing number of power plugs used to run my devices and Raspberry Pis

I have two Raspberry Pis with an external 3.5" HDD connected to each. They're taking up 4x sockets on a power strip underneath my TV. A few of which are wall warts with a USB plug on the end ...
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1answer
2k views

Connecting Raspberry Pi inline with ATX power supply standby

I am looking to have a Raspberry Pi in my desktop computer to run some auxiliary functions. There is a lot of information about using ATX power supplies with the Pi, but I haven't been able to nail ...
0
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1answer
2k views

Raspberry Pi 3 with Samsung charger [duplicate]

So I found a Samsung charger with no quick charge just a normal one. But it outputs 5.3 V and 2 A. I've read at other forums that it shouldn't pass 5.25 V. So I wonder if it still safe to use it to my ...
4
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2answers
10k views

Is a 2.4 A 5V USB charging port enough to drive a Pi 3?

So its a qualcomm quickcharge enabled smartphone charging port. The recommended amperage for the pi3 is 2.5A, does the 0.1A make a difference? Also what is the difference between a charger and a ...
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1answer
527 views

Alternate power methods

I have an embedded zero I'd like to power from a battery pack with 4 AAs. I know I can connect the leads the the GPIO as well as cutting apart a cable to plug in but I am wondering if I could solder ...
0
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1answer
1k views

Power Supply for PI Zero [duplicate]

I was thinking about getting a cable for Pi Zero, this one: https://www.adafruit.com/products/1995 But it's 2.4 ampere, won't that overcharge the little Pi Zero and damage it? The specifications say ...
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2answers
246 views

External storage without supplementary power

Is there an external storage without needing supplementary power? (i.e. a second power adapter) EDIT: Would a very light-weight external USB SSD, such as this Verbatim, have a low enough consumption? ...
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2answers
2k views

Is it possible to power an orange pi/raspberry pi directly from a computer's power source?

I am looking for a way to put a raspberry pi like computer in an other regular computer. I don't care if this way is a "hack". The first thing I need to take care of is the power source (5v, 500ma ...
1
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1answer
771 views

Battery power supply and safe shutdown on power outage

I'm completely new with Raspberry Pi. In fact I'm just planning to buy a Raspberry Pi 3 Model B, but I don't have anyone yet. I want it to be running 24/7 so I'm worried about power outages. I've been ...
3
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3answers
1k views

Powering Raspberry Pi 24/7

We are working on a thesis and we are thinking of using Raspberry Pi for our data logging of our greenhouse monitoring system. We decided to to use a solar panel to power the Pi 24/7 but we don't know ...
0
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1answer
353 views

Powering a Raspberry Pi from a smartphone power bank [duplicate]

I'm looking to power a raspberry pi model 3 for a portable project. If I were to power it from a 10000mAh power bank (meant to charge smartphones), would the Pi be ok off this power supply, and if so, ...
0
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1answer
416 views

ACDC Hat for Raspberry pi

I though of designing a HAT (additional snap-in board) for Raspberry Pi that has ACDC power converter, 5V protection and a super-capacitor for short power drop solution on it. Why? Maybe it is a bit ...
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2answers
669 views

Powering Raspberry Pi 3 alternatives

I am starting my first raspberry pie project and I am essentially going for a entertainment center. I ordered a 2.5A power adapter to provide power to the unit, but was wondering if it was possible to ...
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0answers
505 views

Raspberry Pi B+ power-supply and USB problems

I have two Raspberry Pi B+. One of the two is rather unstable (details below) and I would like to understand if it is just a defect or if I might have broken it so that I can avoid making the same ...
4
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2answers
12k views

How to configure Raspberry Pi in my car [closed]

I have a plan to put a Raspberry Pi in my center console of my 2012 Nissan Maxima. I'm new to Raspberry Pi, but have experience with technology of this sort. In the center of my car, I have a: USB ...
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0answers
63 views

What did I fry on my RPi 1 B?

I seem to fried something on my RPi 1 Model B by connecting a 12V source instead of a 5V source to the micro-USB port. When I now connect it to a power supply, the PWR LED turns on and nothing else ...
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5answers
5k views

Does the Raspberry Pi 3 regulate the voltage on its 5V pins?

I need to supply 5v analog power to an adc. I am supplying the pi with Li-ion batteries, so the voltage falls over time, but does remain within range of the pi's required input. If the input voltage ...
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3answers
14k views

Official Raspberry Pi 7 inch display power consumption

I bought the display along with the camera board v2 a couple of months ago to work on some projects with my Raspberry Pi 2 but only recently found the time to actively experiment. Now unlike the ...
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1answer
77 views

Boot loop persists after changing power supply

This week, after updating my Raspberry Pi B+ (running Arch Linux) to fix the Dirty COW bug, it turned itself off and when I went to check it, it was stuck in a boot loop. I searched about it and ...
0
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1answer
2k views

Can I use a 5V 4A USB charger as a psu for Raspberry Pi 3? [duplicate]

I want to power my RPi-3 using a 4A 5V USBcharger. I connect a hard drive, wireless keyboard adapter, and a pendrive usually and I get a yellow coloured lightning bolt on the upper right side corner ...
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1answer
5k views

Powering Pi 3 by power bank [duplicate]

I am interested in buying Pi 3 for a hobby project, my idea is to put it in my car(i know i can use power from the car battery, but that is not the idea of the project). I have been looking through ...
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2answers
874 views

Ok to use 2 port USB Power adapter?

I recently bought a RPi 3 but got a concern with its reliable operation in relation to the power source. A store near me has something like this but it has only two ports - http://www.amazon.in/...
0
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1answer
746 views

Power RPI 3 via micro USB with only Vcc and GND pins plugged

I have a Micro USB connector that is connected to 5V power supply directly: I removed all the other pins on purpose (for easier soldering) but when I plug it in it doesn't power up. I checked the ...
4
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1answer
3k views

Could voltages over 5v damage a pi?

We have a fleet of pi 3's plugged (via microUSB) into 5v/3A USB adapters, hooked directly into vehicles. I measured one such usb adapter at 7.5v, and the pi 3 that was hooked into it was dead; it ...
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2answers
43 views

Regulate the voltage

For my project, I have this power supply which makes me an unregulated 5V power input. I'm willing to use it to power both my Pi and my 5V led strips. This power supply is rated at ±5%. I'm going to ...
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1answer
114 views

Power Raspberry Pi and charge Adafruit FONA from same source

I have 12v leisure batteries hooked up to solar panels, I want to be able to power my pi (5V 0.7A max) and charge the Lipo battery for the Adafruit FONA (5V 2A max) for a combined 2.7A max (i think) ...
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2answers
484 views

Power multiple Pis through 5V GPIO and 5V wall wart

I'm considering making a Pi cluster (Let's say 8 Pi 3s), and instead of buying an 8-port USB charger and 8 USB cables of exactly the right length, could I use a powerful enough (8A?) 5V wall wart and ...
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2answers
7k views

12V DC buck converter to power Raspberry Pi

I found a DC-DC buck (step-down) converter on amazon that will drop my 12V supply to a 5V 3A max with micro USB already attached. can anyone foresee any issues with using this following product in ...
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1answer
2k views

Raspberry Pi 3 stuck in rebooting after finishing the install

recently, i bought Raspberry Pi 3 and started to setup the stuff! first of all, i used laetest NOOBS OS and its just finished the install and after that stucked in Rebooting! then bought another SD ...
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4answers
5k views

Is it safe to plug Raspberry Pi 3 to 6V?

I'm working on a project that requieres a lot of current. I'm using 6 servos, and 4 DC motors (all of them plugged to an Arduino, ontrolled by the Raspberry). I've seen a battery of 6V 4.5A, and ...
2
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1answer
954 views

RPi model 2 - USB ports receive no power

The USB ports on my Raspberry Pi 2 model B V1.1 do not receive any power. I measured the USB pins with a multi-meter, which should have 5V, but have none. I tried different power supplies, which work ...
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3answers
1k views

Easiest way to delay shutdown by a few ms after power loss

I'm looking for the easiest way to delay the loss of power to the pi (for a duration on the order of milliseconds) after the power supply is lost. I'm no good at designing circuits and I'm guessing ...
0
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1answer
57 views

Is there any way of having uncorruptable storage?

I'm looking for a way to have raspberry pi that I can just turn on and off without worrying about fs corruption (not out of laziness but because it is part of a machine that must behave that way) - ...
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0answers
47 views

Should I go for a power bank that has 5v output and 12 volt output

I have found this power bank ( http://www.amazon.in/Penibel-PT-10-10000mAh-Technology-smartphone/dp/B01FY58PLG?tag=googinhydr18418-21&tag=googinkenshoo-21&ascsubtag=2c2001f7-f9b7-4db1-9b28-...
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2answers
405 views

How Much Current for GPIO Power Supply?

I'm working on an audio project where the Raspberry Pi will be powered off the GPIO. I was trying this using an LM7805 voltage regulator to get 5v from the 9v power supply that is standard in a lot of ...
0
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2answers
856 views

Converting 24V to 5V for GPIO power supply

in my project I have to power the Raspberry pi over the GPIO port. I know that the voltage must be regulated to 5V. My input is 24V so I have to convert it to 5V. I'm currently designing a PCB with ...
5
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2answers
919 views

When to power GPIO projects from external power source?

I am working on a home automation project using: rPi 3 with 2.5 A power source 3 x MCP23017 for GPIO port expansion 3 x 8 ch solid state relay board by Sainsmart 20 x physical wall switch (future) ...
2
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1answer
90 views

rpi kind of turns off (not accessible by ssh / vnc, red light on), var/log with regulatory domain

I am using a rpi3 with an external usb disk and a 3A power source, but the system seems to turn off after 1-2 days of normal use. I know that because I cannot access it (ssh or vnc), but there is a ...
3
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1answer
4k views

Control 5m of WS2812 LED Strip: Wire it up

I want to control 5m of WS2812 LED Strip with my Raspberry Pi, which will be placed around two Ikea Billy shelves. I read some articles and tutorials regarding this topic: http://popoklopsi.github....
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2answers
598 views

Samsung 3.8 v battery + adafruit usb boost

I have a 3.8v / 3100mAh battery from a galaxy note 3. Can I use this along with https://makersify.com/products/adafruit-powerboost-500-charger-rechargeable-5v-lipo-usb-boost-500ma? The powerboost ...
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2answers
88 views

How can I wire a separate battery pack and control it with the 40-pin GPIO?

I am building a high altitude balloon and I need another way of bringing it down besides the balloon popping. I would like to regulate a battery pack with the GPIO on the Pi in order to heat a ...
0
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2answers
381 views

Syncing multiple Pis operations via GPIO

I want to perform the same operation on 20 Pis exactly at the same time. What I am currently doing for 3 Pis (and a master) is I have a master Pi that says when to perform the operation And three ...
0
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2answers
2k views

Controlling a 5m WS2812 LED Strip. Which power supply?

I read the following tutorial: http://popoklopsi.github.io/RaspberryPi-LedStrip/#!/ws2812 In the tutorial 1m of WS2812 led strip is used and it is stated, that its power supply needs a maximum of 3,...
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3answers
3k views

Supply 3.3V via GPIO header (Pi3)

I need to power a Raspberry Pi 3 via its GPIO header: I have a beefy regulated PSU capable of providing stable 4.98V, which I planned to route to the 5V pins of the Raspberry as stated in this answer: ...
62
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2answers
66k views

Raspberry Pi Power Limitations

There are very many, often contradictory, claims about the power requirements and limitations of the Pi. What are the exact requirements?
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1answer
13k views

Can I power a Raspberry Pi 3 with a Smart TV's USB-Port?

We use a Raspberry Pi to display infos on a TV. The content is more or less HTML with some Animations. Currently we use a Pi2 and the power does not seem to be a problem. Recently we came up with the ...