Power is the ability to supply a device with energy. This question covers how to power the Pi, ways to do it, and the safe ranges of power.

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Can I power a 3V water pump using the 3V3 pin?

Zero experience here. Would it be possible to connect a simple water pump that requires 3V to the 3V3 pin of the RPI? And in case the answer is no: why not? What other power source would then be ...
2
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2answers
32 views

Does it matter which pins are used when powering the Pi from the header?

If you didn't already know, you can power the Pi from the GPIO pins. By supplying pin 2 with 5v and connecting a ground to pin 6, you can power the Pi. My question; does it matter which pins are used? ...
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1answer
46 views

Measuring 10 volts?

I am building a movement monitoring system on a Raspberry Pi 2. I've just put a meter on the 5V and GND pins, and I'm measuring ~10V. The 3V3 and GND show 7.5V. What on earth is going on? Or have I ...
0
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0answers
23 views

Powering EL (electroluminiscent) wire with Raspberry Pi 2?

I have bought this 3 items: Electroluminescent (EL) Wire - 2.5 meters (https://www.adafruit.com/products/406) EL wire 4xAAA pocket inverter (https://www.adafruit.com/products/564) USB Battery Pack ...
0
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2answers
45 views

Can I use the USB Hub to power the Raspberry Pi Zero?

I have this hub, with the Pi Zero: I know that I need to power the Pi via the USB power port and that the Hub is powered a separate power supply; provided when you purchase it. But I'd rather ...
0
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0answers
17 views

How to supply more power to output devices (not to Raspberry pi)? [closed]

Please help me to understand, how I can supply more power to my output device. For Example I have 100 LED lights, for those lights 5V is not just enough. They need more external power has well. How ...
1
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1answer
23 views

Using Unpowered USB

Does the Raspberry Pi's USB need the 5V/GND wires in order to work with peripherals that are already connected to the same 5V/GND rails as the Pi? I have an application where a RPi is connected to an ...
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3answers
47 views

Can I power a Pi with a ribbon cable AWG 28?

I wonder whether it is Ok to power a raspberry pi using a ribbon cable. Reading this information, I think it is not possible because 1.8A is recommended. Is it like that? I have a really limited ...
0
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1answer
22 views

Can I power a DC motor with the Pi's 5 volt pin?

The Pi has a 5 volt output. This DC motor draws about 600 mA when it is stalled. Is it safe to power the DC motor using the Pi's 5 volt output pin? If not, can I power it with a microusb charger?
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1answer
26 views

Optocoupler to control pi power supply

I got an idea of using a ATtiny85 and an optocoupler to control my raspberry pi's power supply. The optocoupler is the L1513. Would this be possible? simulate this circuit – Schematic ...
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0answers
18 views

5V 10A 4 channel relay w/led indicators need help

The Situation I have my 4channel 5V relay hooked up to my Pi. The led indicators on the relay, and the click noise, respond to commands as expected, however the outlets only sometimes switch. My ...
0
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1answer
47 views

What is the minimum power supply needed for PiZero? [duplicate]

What is the minimum power supply needed for PiZero? I want to know the numbers in terms of Voltage and amperes. I want to build a cluster of Pis.
1
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1answer
38 views

How to find a robust power adapter for a Pi running 24/7?

Trying to diagnose recent problems with my Pi which effectively rendered it unusable -- short freezes whenever I took an action in Kodi, temporary loss of network connection, all accompanied by red ...
0
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0answers
20 views

Servo problem with arduino connected to Raspi

I have an arduino that's serially communicating via the USB from the raspi and getting powered as well. I'm connecting a servo that is powered by a 7805 regulator from a 9v battery and the signal ...
1
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1answer
39 views

Raspberry Pi Model B USB controls power?

When I plug in my keyboard's bluetooth dongle to the USB port, my Raspberry Pi boots up. When I take it out, the power seems to instantly cut (screen goes black, Pi unreachable by ping/ssh). Note that ...
0
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1answer
57 views

How do I stop HDMI powering my Pi?

I have my pi 2 running Kali 2.0.1 which is hooked to a 7in tft sun founder screen. The problem is that when unhook in micro USB port to power the pi is still running so in order to turn my pi off I ...
0
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1answer
85 views

How many AA batteries do I need to power a raspberry pi zero and for how long does it last? [duplicate]

Since the raspberry pi zero takes less power to power up. How many AA batteries do I need to power it up to play a movie in a loop? And how long would this last?
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0answers
55 views

How to power to Raspberry Pi with a combination of 1.5V batteries?

I am new with raspberry ,was looking for a ways to give power to raspberry with combination of 1.5V batteries. Is there any way to do so? My main concern is how I connect the power of these 3 or 4 ...
6
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4answers
132 views

How can I power the pi safely?

I'm a student in 7th grade building a project that has to include a raspberry pi of a contest coming up in april. Long story short I have a solar panel with a 6v usb output and I would like to power ...
3
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2answers
107 views

Basic question on powering multiple Pi's

So my daughter and I have each bought a few Pi computers (A, B+ and two 2's). We'll likely be playing with a couple more in the future. I'm running out of plugs for all these and would prefer a ...
1
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0answers
54 views

Unable to shutdown Raspberry connected to UPS

I'm quite new to Raspberry world and I need you help :) I've configured my Pi as a small NAS and download station but I also use it to manage some sensors in my house, so I bought an UPS. The ...
1
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1answer
59 views

Max safe current and power requirements for Raspberry Pi 2 Model B?

I have a few questions to ask. I have referred to many other similar questions, but couldn't get a straight forward answer to my questions. Current situation: I just recently bought a Canakit ...
2
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2answers
124 views

How can I add an On-Off switch to my Raspberry Pi 2

I want to add a on/off switch to my pi 2 to correctly shut the pi down This is the switch I want to add: Edit: moved from a link to be included below: This guy in a Raspberry Pi kik group made ...
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1answer
93 views

I short circuited 5v & gnd of Rpi

Accidentally I short circuited 5v & gnd of R-pi, since then my R-pi is not working. How can I make it start again by means of replacing some IC or power regulator or anything ? Please help.... ...
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1answer
77 views

MOLEX to Micro-USB to power Raspi-Pi

I am thinking about modding up some sort of system that would deem it necessary to involve a MOLEX (Internal PSU connection) to a Micro-USB 5V (VCC) connection. Molex Pinout Micro-USB Pinout ...
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1answer
76 views

Resetting the Pi's main Power Supply polyfuse faster

I have read on Wikipedia how a Polyfuse works, and other Questions have shown that shorting out some of the GPIO Pins or other "accidents" can trip this item on the Pi. Given that the failure ...
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1answer
74 views

Raspberry Pi 2 works with 1A supply but not 2.5A or 3A supply

I am able to boot my Raspberry Pi 2 while using a 1A power supply. However, when I try to power my RP2 with a 2.5A or 3A supply, nothing happens - No LEDs light up and I am unable to measure any ...
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1answer
66 views

Faint PWR LED, doesn't boot

I've just installed Raspbian to my new RPi2 B+. Shutdown and connect Adafruit Neopixel Ring (3 connectors: 4th pin - 5v, 6th pin - GND, 12th pin - DATA IN) and boot the RPi. Then it has reset itself ...
2
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0answers
48 views

Computer PSU 5v Output direct with Raspberry Pi USB

I'm using an old power supply unit from an old computer (2011 HIPRO) to power my Raspberry Pi. I have measured the voltage across the terminals of the 5v output (Red and Black) and have proceeded to ...
4
votes
3answers
185 views

How much current should I supply my 2 model B?

I am looking to get a new power supply for my Raspberry Pi 2 Model B (I am currently using a 1A supply). Since my setup has multiple elements which require USB power I am looking at USB power strips. ...
0
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0answers
47 views

Pi2 Flashing Green Light Only

My Pi2 no longer boots. I just get a steady flashing green light. No obvious pattern, just continuously flashing every second or so. No red light. It's connected to an official power supply like ...
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2answers
123 views

Holding the PI in reset?

Is it safe to hold the pi in reset (via run/p5) indefinitely? If so, will it save on power consumption?
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3answers
118 views

Powering the Pi from battery (power consumption)

I've got a Pi 2 B+ and I plan on using one of those portable battery-powered phone chargers to power it. I'd like to get about 8 hours of continuous power. I'll also be powering a 5-inch LCD and a ...
3
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2answers
313 views

Underclocking PiZero for power saving worth it?

How much power does the PiZero consume on it's lowest possible cpu clock setting (underclocked)? (Let's say the only usb add on is a wifi dongle.) And... is it worth it?
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0answers
36 views

How could I control lights by clapping my hands?

I've wanted to create a project where I can use a simple hand clap to control a light, on and off. I've started by looking for a Solid State Switch like this one @ sparkfun, that I would control via ...
0
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1answer
147 views

How to use both WiFi and Bluetooth dongles at once without powered USB hub with Raspberry Pi Zero?

I'm aware of the point to get powered USB hub, but my goal is to make the device as small as possible and decrease number of wires. The idea is to make a tiny otg male->two usb female passive hub and ...
1
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1answer
59 views

Confused about TL-WN725N

I have a Raspberry Pi 2 with Ubuntu Mate and I use it with: TL-WN725N CSL Nano Bluetooth v4.0. If I use only the wifi, the signal will be more powerful and the connection more stable than when I ...
0
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2answers
947 views

Can the Raspberry Pi Zero be powered by a real usb port?

I have a powered USB hub. Can I use it to power the Raspberry Pi Zero using up just one Micro USB port? Or does the power have to come from one particular port that is only used to provide power?
2
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3answers
152 views

RPI Forever On?

I have my RPI2 deployed as a receiver at remote location which is intended to be forever on. But after some 20-30 hours, it goes into some mode with just red light turned on(no green light blinking) ...
0
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1answer
34 views

How many devices can a Raspberry Pi provide power to?

I am planning to start a project, but the project heavily depends on it's mobility so I did not buy anything yet. But I am wondering, how many external devices can a raspberry pi provide power to? The ...
1
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1answer
212 views

Raspberry Pi 2 as Car-PC: Shutdown when ignition off & boot when ignition on

I want to build a Car-PC, based on a Raspberry Pi with Display to play MP3´s. If I turn on the ignition in the car, the raspi should boot. When turning ignition off, the raspi has to shutdown. How can ...
0
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0answers
34 views

raspberry pi is not working

I plugged in raspberry pi A+ but the usb port was not working, I was checking the wire, that suddenly the board turned off and now even the red led does not turn on, Can I fix it ? what is wrong with ...
2
votes
1answer
220 views

Is my raspberry Pi dead

I tried a circuit with raspberry pi to drive a motor, so there was 12 V at the circuit I used it with. I might have wired it in a wrong way for a short while and I immediately shut the power down. At ...
10
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3answers
2k views

Raspberry pi lifespan reliability

I have to set up a three monitor display for a museum, that will run 24/7 , and I think about a simple pi wall. But I'd like to know if a raspberry pi is a good long therm solution. The system will ...
2
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1answer
120 views

Data logging during power loss

My Raspberry Pi, model B, is going to be sent up on a hydrogen balloon to collect data on some solar panels. I've written a python script to collect data from these panels using 3 INA219s connected to ...
2
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0answers
46 views

Robot running off Raspberry Pi A+

I am participating in a competition where I need to make a motorized vehicle that goes a distance you learn immediately before competing. What I have in mind is to mount a Rasp Pi A+ and a motor to a ...
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2answers
114 views

Easy way to switch on and off of 12V DC current

I recently bought a compressor and now I want to be able to turn it on and off programmatically using my Raspberry Pi Model B. Since I know nothing about electronics, it seems like the safe option ...
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2answers
61 views

Backup power for pi 2 model b

I'm developing a CCTV system out of a pi 2 modal b and everything is on track using noIR camera and stuff. Since a CCTV should work for few hours without power, I'm in need of a backup power source ...
1
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0answers
19 views

PI Camera and Bitbanged GPS -> Fluctuations?

I again got a bit of a problem. I am using a Raspberry Pi to BitBang Data out of a UBLOX Gps. I got this working and am receiving the NMEA information as i need it. Now I added Image acquistion to ...
2
votes
1answer
94 views

Raspberry Pi - Rainbow screen

I'm trying to boot up Exton's Android build on Raspberry Pi 2, but I seem to be getting the rainbow screen. Here is what I have - 4 partitions as follows boot which has 512 MB, flagged as bootable ...