Questions tagged [power-supply]

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

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Raspberry pi screen resolution and power supply

My RPi screen resolution is lower when I power it from a mobile charger than when I power it from a power supply. When I use the power supply it gives a different (higher) resolution. I checked the ...
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35 views

Raspberry PI UPS that doesn't shutdown the pi [duplicate]

So, I want to make an UPS for my raspberry PI, but the UPS needs to be able to supply power to the pi for several hours. So I mean this: The pi originally gets power from the wall socket, but in ...
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Dangers of Underpowered Pi?

I'm reading that the lightning bolt in the top right corner of my pi means that it is currently underpowered. I won't be able to get a new cord for a few days and I'm wondering if running under ...
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19 views

Is there any accessory available which can help me draw power from two different sources?

I want to draw power from wall and also use my power bank as a backup power source, I want to flexibility to remove any of the power source without shutting it down. I really dont want to chain the ...
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1answer
424 views

Battery Power supply for Pi-3, LCD and transceiver

I am using a raspberry pi 3 model B (5V/2A), a sainsmart 7" lcd display (12V/2.5A), and a ESP8266 2.4Ghz transceiver (3.3V) for a project. It needs to be mobile, so what kind of power supply ...
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3answers
399 views

New Raspberry PI is not booting [duplicate]

I am new to raspberry pi. Here is video what is happening when I plug it to main and my HDMI monitor Recording. At the end of this video I tried to show what type of power supply I use, but it's ...
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2answers
1k views

Is it possible to run Pi Zero from Phone Battery

I would like to create a retro game project and I have to be able to have a portable Pi without being plugged into a electric socket. I have been looking into my phone battery and saw that it's 4.2v ...
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2k views

12v relay not turning off with usual gpio off comands but turning off with gpio.cleanup

I have SRD-12VDC-SL-C relay module which I want to control using raspberry pi but unfortunately, none of the gpio off commands are working. However GPIO.cleanup and turning pin to input is working to ...
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582 views

Portable MP3 Player

The project is a small as possible MP3 player using the Raspberry Pi Zero. I understand the software side, but have a question about compatibility of hardware. For input/output I will be using the ...
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70 views

Is it okay to use the official Pi 3 PSU with a Pi 2?

I have both the Pi 2 and (as of recently) Pi 3. I have a power supply unit (PSU) for both: One no-name PSU for the Pi 2 that came as a part of a starter kit One official PSU for the Pi 3 that came as ...
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779 views

How can I display the charge from a battery on my Pi? [closed]

I have a robot that uses a Raspberry Pi 3 Model B and a 12 volt sealed lead acid battery. The battery powers other things (motors, etc), and the Pi receives a regulated current. How can I display the ...
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Compute Module 3 current/thermal profile

The Pi Foundation just announced the second iteration of the compute module, usefully called the Compute Module 3. In their press release they've dropped some fairly hand-wavey statements about the ...
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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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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) ...
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1answer
89 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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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 ...
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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 ...
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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
542 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 ...
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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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267 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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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 ...
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1answer
781 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 ...
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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 ...
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1answer
356 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, ...
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1answer
433 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
673 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
511 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 ...
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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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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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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
78 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 ...
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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
916 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/...
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782 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 ...
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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
45 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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490 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 ...
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1answer
976 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 ...
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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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48 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-...