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Questions tagged [power-supply]

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

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1answer
218 views

Low power alert logo

While simple tasks like browsing web, a lightning bolt appears in the top right part of the screen. I'm using a 2A charger. Is this really dangerous, for the pi or the SD card or the peripherals ...
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1answer
12k views

DIY uninterruptable power supply (UPS) for Raspberry Pi Zero

I have several pi-zero boards and I utilize them to monitor environmental conditions (such as humidity, temperature and intrusion) of each room in home. For continuous operation, I want to eliminate ...
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1answer
214 views

I'm not sure how to ground the L293D Motor setup I'm using

According to Texas Instruments, the L293D has the following setup Enable 1, 2 Driver Channels (5V) [ u ] Chip Power (5V) Driver Input 1 [ ] Driver Input 4 ...
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3answers
344 views

RPi3 show under voltage warning while input voltage seems good

I'm designing an embedded system that will be based around a RPi3, combined with the official touch display. In working out how to power the device, I'm getting stuck because the Pi I'm using keeps ...
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0answers
27 views

How does a Raspberry Pi 3 react with low voltage as batteries die? [duplicate]

How does the Raspberry pi react as voltage drops from batteries die? Does it eventually automatically halt or do I need to worry about unpredictable side effects from running the batteries dead?
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52 views

How to determine from hardware, when I can shut off a Raspberry Pi 3

I am wiring up a raspberry pi to use a battery supply and I would like it to be a single switch controlling its power. Obviously, I don't want to cut power when its running, but I also don't want two ...
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2answers
69 views

Power requirement [duplicate]

I am using Raspberry Pi 2 model B. What is the exact power requirement of this device. Some friends are saying it want 5V 2000mA power supply and some other friends are saying it want 5V 2.5A power ...
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1k views

Running my pi and 7" screen off a battery

What I have: Raspberry Pi 3 Raspberry Pi 7” Touchscreen Display Raspberry Pi 7" Touchscreen Display Case I would like to make this thing portable and would like to add a rechargeable battery. In ...
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1answer
375 views

Will low power indicator come up on any os(retropie) if power is low?

I'm building a portable gaming system and I have a power bank coming in for it I want to know if it will indicate a warning if my "battery" is not supplying enough power so I know when to shut it ...
4
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1answer
657 views

Powering WS2812B LED strip from Pi brownouts

I have a Raspberry Pi 3 Model B currently controlling and powering a strip of WS2812B LED's. A separate 5V 15A power supply powers the Pi through pins 2 and 6, while the LED's are powered off of pins ...
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2answers
646 views

Raspberry Pi Zero powered by Buck converter

I am building a light I can control from the command line across WiFi. I've got a Raspberry Pi Zero, a tiny little WiFi dongle from ModMyPi and a relay with VCC, Ground and IN pins. I also bought one ...
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1answer
80 views

Can I use a single power supply to power a Raspberry Pi and some relays?

I need to power a Raspberry Pi and some relays (that work with 5V). Would it be possible to use a single power supply for both? Because I will have a lot of relays, I can't use 5V Raspberry Pi pins to ...
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0answers
792 views

Sense HAT not working on RPi 3 correctly with official power supply

I have a Raspberry Pi 3 model B. I was using a 5.25V 2A power supply that I used for my previous Pi 2 (which made the red light flash because it didn't provide enough power) until last week, when the ...
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2answers
426 views

Power raspberry from OTG supporting smartphone

I would like to power my raspberry pi 3 from an OTG supporting smartphone. I can get my hands on a Galaxy S3 for this purpose. My raspberry only uses the built-in wifi module, runs a loop and no usb ...
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1answer
4k views

Best way to power Raspberry PI 3 via GPIO

I need to made device controlled with 3 Raspberry PI connected in cluster and want to made power supply via GPIO. Do I need made 3V3 and 5V supply or just 5V on GPIO2? Thanks.
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1answer
221 views

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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0answers
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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2answers
8k views

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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0answers
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 ...
0
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1answer
429 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
409 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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2answers
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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0answers
604 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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2answers
72 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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1answer
810 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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2answers
3k views

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 ...
3
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1answer
6k 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 ...
2
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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 ...
11
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7answers
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) ...
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1answer
90 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 ...
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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
11k 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
572 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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2answers
284 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
794 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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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
366 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
444 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
678 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
520 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
13k 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
66 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
6k 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 ...
5
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3answers
15k 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
81 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 ...