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

learn more… | top users | synonyms

1
vote
2answers
15 views

Tapping into 5v power

I will be using a high-amp 5v power supply feeding the Raspberry Pi 2 via microusb. (Similar to this http://www.dx.com/p/dc-6v-24v-to-usb-dc-5v-3a-regulated-power-supply-module-black-314056 one) I ...
0
votes
4answers
35 views

Power supply for Raspberry Pi 2 Model B

I have Raspberry Pi 2 Model B and two USB power adaptors with specs: Apple charger: 12W 5.2V 2.4A Samsung (came with galaxy S6): 9V 1.67A or 5V 2.0A It is stated that my Raspberry would need 1.8A ...
0
votes
2answers
39 views

Increase raspberry pi voltage

Say I bought you a RC car as a gift, that works on 24v battery. You decided that RC car is boring and want to control it with raspberry pi 2. There are two motors on the car. You bought a voltage ...
1
vote
1answer
46 views

Connecting WS2801 LED strip to my Raspberry Pi

I'm new to the Raspberry Pi community and to working with electricity, so I'm looking for some advice. I've brought the WS2801 LED strip from eBay (but I think it's the same as this: ...
0
votes
1answer
61 views

Undervoltage rainbow despite good power supply

I have my Raspberry Pi 2 since a week and noticed that little rainbow on the top right corner of the screen. Seems like this is a alert for under voltage. I tried different power supplies and my best ...
0
votes
0answers
39 views

Motors have stopped working

I was building a model car, and had 4 motors connected to a h bridge. Everything was working exactly as planned, the car was fully operational, but after a day I ran the program again and some of the ...
4
votes
1answer
226 views

Controlling Servos with a Raspberry Pi

I am not sure if this will break my Pi, so I decided to double check In this image is a simple servo connection, I am still learning how servos work. I actually have two questions: If I decided ...
2
votes
1answer
187 views

Help on powering 3.3V fans

I'm not 100% sure if this is the right form to post in, and I'm not the best writer... so please let me know if I make no sense. So I'm doing a little project and was wondering on how I could power ...
0
votes
0answers
11 views

Ac adapter for pi [duplicate]

As you all know the raspberry pi has no on/off switch (you can modify it but knowing me, I'll probably break it) so I found a cool male USB to male micro USB with an on/off switch... To use this I ...
0
votes
0answers
25 views

Raspberry dead?

IN order to change the circuit, I unplugged the pi. Now when I plug it again (through micro USB), I've no lights at all. I tried with several power supply, which work with my phone. Also I see ...
2
votes
1answer
115 views

Outdoor Pi Security Camera

I'm hoping to make an outdoor Pi security camera. I don't want to run any wires so I'm hoping to get a Wifi connection along with solar power. I've been looking into the PiJuice solar as an option ...
0
votes
0answers
29 views

Reboot after some times a GPIO output is on

I'm using a raspberry PI B+ to drive a relay via a BJT transistor. The GPIO pin source about 8ma ( calculated, since it is driving a 600 ohm load ) so when the I/O is on there should not be a too ...
0
votes
1answer
103 views

My Pi2 won't boot. How do I check\measure the voltage on a Pi2

So my Pi is giving me the red light of doom and I want to check to see if the power supply is faulty. How do I measure the voltage on the Pi2 from the power supply to ensure it is not faulty?
1
vote
3answers
59 views

RPI 2 B freezes when Wi-Fi dongle is inserted and doesn't detect it

I have an RPI Model 2B running Raspbian that works (almost) perfectly. I recently bought a TP-LINK WN725N V2.0 that I thought would work if I followed the instructions listed here. However, when I ...
2
votes
4answers
223 views

When is it safe to switch power off after halting Pi

When is it safe to switch off the power supply to the pi after it was halted? I am using ssh to access my Pi (runs Raspbian), and sudo poweroff to shut it down (the wifi dongle keeps blinking for a ...
1
vote
0answers
74 views

Power with batteries on 3.3V

I've already investigated how to power the RPi with batteries (I did some tests with AA batteries and with 18650 batteries) using a 5V "boost" step-up DC-DC converter, in some other questions here. ...
0
votes
1answer
144 views

Wire 5v to raspberry pi b+ without microUsb

On the original model b it was possible to wire power to the tp1 and tp2 (which ran through the fuse and was protected?) I am upgrading my 3d printer to run with a b+ but the b+ does not have the same ...
16
votes
7answers
4k views

Why does the Raspberry Pi not have a power button?

If you buy a computer you expect it to come with a power button. So why does the Raspberry Pi not have one? Is it because it would take up too much room or be awkward to fit on the PCB? Personally ...
0
votes
1answer
121 views

Using a power supply to power Pi and Pump

I asked a questions about controlling a water pump with the pi and in one of the answers (http://raspberrypi.stackexchange.com/a/32014/19436) he mentioned I could get one power supply to power both ...
1
vote
1answer
70 views

How do I interpret the Volts and Amps on my Raspberry Pi Power Adapter?

I have a Raspberry Pi 1 Model B. I have now bought the Power Adapter so I can finally start using it. But I am wondering how to interpret the information written on my power supply. The Power Supply ...
2
votes
1answer
90 views

How to measure Power Supply without Extra Hardware on B+ and RPi 2

As shown in this question, for the Raspberry Pi model B, in order to measure the voltage you just connect a multimeter to the TP1 and 2 pads. How is this done on the Raspberry Pi model B+ and 2 which ...
0
votes
2answers
129 views

How to connect Relay module to a Power Strip Outlet

I am sure somewhere a tutorial for this exists and I am just fool enough not being able to find it. So what I have done is: I have a 4 channel relay module I have connected the relay module with my ...
1
vote
2answers
152 views

Mobile power source for RPi? [duplicate]

I have an RPi B and using a USB hub need to plug into it: A LogiLink Wifi nano USB, and 3 USB NFC readers (3*200mA=600mA) This should roughly add up to less than 3A: Power for: (RPi) + (USB ...
0
votes
1answer
386 views

Raspberry Pi 2 - HDMI not displaying

Just recently purchased a Raspberry Pi 2 Model B 1GB. I also bought a micro SD card Kingston 16GB Class 10. I loaded up the Noobs software as instructed on: ...
5
votes
3answers
305 views

Powering the Pi with 2 AA batteries

I've tested the Pi with a single 3.7V 18650 battery and this < 5$ power boost/power bank. It works, and this single battery runs for at least 1.5 or 2 hours. (Sidenote: during my tests, the ...
1
vote
1answer
52 views

Why is I2C disabled by default?

It seems that, to use I2C, we need to: un-blacklist I2C with sudo nano /etc/modprobe.d/raspi-blacklist.conf enable I2C kernel module with sudo nano /etc/modules Why is it disabled + blacklisted by ...
0
votes
1answer
734 views

Power Bank + raspberry pi 2, any throughts?

I am currently thinking about buying a Power Bank to use as a power supply for my Raspberry Pi 2. At the moment I am looking at the XIAOMI Power Bank 5V 2.1A 16000mAh. My questions are: Will it ...
1
vote
3answers
379 views

Power Raspberry with LiPo battery

I have a LiPo batterery: EZ-power LiPo 4000mah - 2s 7.4 How could I power the Raspberry, I just know that Pi works at almost 5V.
5
votes
2answers
356 views

Is it correct to power the Raspberry Pi this way?

I have an embedded Raspberry Pi in an enclosure, with a micro-USB female socket (see middle picture) for power input. Is it correct to power the Raspberry Pi like this (micro-USB socket VCC to GPIO ...
1
vote
1answer
354 views

Raspberry Pi 2 max USB current

I'd like to power an RPLiDAR (5V @ 230mA) and a Pixy CMU Cam5 (5V @ 120mA) Is this possible I can give it a 5V 4A powersupply if necessary. Will this burn out the Pi over time?
3
votes
1answer
130 views

Making batteries last for pi outside

I want to use the pi to analyze the moisture of my plants and decide to water or not. I want it set up in the garden. There is no power supply, so the pi will need to run on batteries. The plan is ...
9
votes
4answers
1k views

Can I use a standard PC power supply to power a Raspberry Pi?

Can I use a standard PC power supply to power a Raspberry Pi, e.g. iMicro IM400W 400W ATX12V Power Supply (or just take one from an old unused computer)? Amazingly, these things are sold starting from ...
0
votes
0answers
76 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. ...
0
votes
1answer
538 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 ...
0
votes
2answers
67 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 ...
1
vote
1answer
160 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 ...
4
votes
3answers
734 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 ...
1
vote
2answers
319 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 ...
0
votes
1answer
85 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 ...
0
votes
2answers
77 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 ...
1
vote
2answers
123 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 ...
2
votes
5answers
1k 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 ...
1
vote
1answer
42 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?
6
votes
5answers
13k 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 ...
0
votes
3answers
160 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 ...
1
vote
1answer
102 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 ...
0
votes
1answer
598 views

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

Essentially What's the current draw and supply voltage tolerance? but for A+ and B+
0
votes
0answers
146 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 ...
0
votes
4answers
415 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 ...
1
vote
1answer
197 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, ...