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

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1answer
108 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 ...
0
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0answers
13 views

Powering a 12V Solenoid Valve with 12V 5a Power Supply

I'm trying to open/close this 12V solenoid valve using this 12v 5A power supply. But, I am unsure how to interface the two. As you can see from the pictures in the links provided, the solenoid valve ...
0
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0answers
12 views

Power Issues with this configuration?

I want to use Raspberry Pi Model B (2011.12) Edimax USB WiFi Tontec 3.5 Zoll Raspberry Pi Touch Screen Display Monitor 480x320 LCD Samson Meteorite USB Microphone all powered over the Pi. ...
1
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1answer
65 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
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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 ...
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0answers
23 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
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1answer
55 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
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0answers
22 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
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1answer
49 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?
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3answers
45 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
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4answers
204 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 ...
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0answers
45 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
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1answer
72 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
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7answers
3k 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
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1answer
89 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
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1answer
60 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
71 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 ...
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2answers
84 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 ...
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2answers
139 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
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1answer
244 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
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3answers
237 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
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1answer
48 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
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1answer
375 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 ...
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3answers
244 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.
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2answers
332 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
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1answer
280 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
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1answer
124 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 ...
8
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4answers
1k views

Can I use a standard PC power supply?

Can I use a standard PC power supply to power a raspberry pi? E.g. this one: http://www.amazon.com/iMicro-IM400W-ATX12V-Power-Supply/dp/B002HREGRM (or just take one from an old unused computer). ...
0
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0answers
69 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
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1answer
388 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 ...
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2answers
60 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 ...
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1answer
148 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
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3answers
536 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 ...
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2answers
239 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
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1answer
80 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
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2answers
75 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 ...
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2answers
120 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
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5answers
984 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
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1answer
37 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?
5
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5answers
10k 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
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3answers
141 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 ...
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1answer
96 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 ...
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1answer
485 views

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

Essentially What's the current draw and supply voltage tolerance? but for A+ and B+
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0answers
135 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
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4answers
371 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 ...
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vote
1answer
179 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, ...
0
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1answer
58 views

Raspbian lxde desktop misbehaving

Installed raspbian on 8gb miroSD card booted with 5v and 0.7A power supply, rpi boots well and works. when i pluged in an headphone, the cursor freezed. I restarted and everything worked well and when ...
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votes
4answers
5k views

Can the pi power this 2.5" drive without a usb hub?

I want to use my PI model B as a NAS, but I'd like to avoid using a usb-hub. I have a 2.5" western digital 1tb usb drive (this one), and a 2A power supply for the pi that I'm planning on using with ...
5
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0answers
323 views

Running RPi on Solar Panel and battery [closed]

I’m quite new in electronic projects and so my basics are quite limited. I've been reading a lot regarding this topic (refer to the title) and I’m currently planning to buy the suitable Solar Panel, ...
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3answers
2k views

What is the best power supply for the Raspberry Pi B+?

I have read through the question What power supply should be used for the B+ model? to find the best power supply for the B+. I have read that if you are connecting additional things to the Raspberry ...