Questions tagged [power-supply]

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

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4
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2answers
3k 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 ...
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3answers
3k views

Can I use an Amazon Kindle Fire power supply?

So i have a spare Kindle Fire power adapter: it's quoted as 5V @ 1.8A. I haven't tried as I don't really want to risk blowing it up!
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2answers
174 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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5answers
2k views

Powering from a non-dedicated power source

While the quick start guide says not to power the device from a USB hub or from a computer, the only requirements for power listed are: Micro USB power supply – make sure you use a good quality one,...
0
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1answer
671 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 ...
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2answers
152 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
11k 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 ...
2
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3answers
2k 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
62 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?
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1answer
421 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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4answers
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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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2answers
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Looking for 3G USB Dongle (with low-power consumption )

I'm developing for my #iot project with a device, a Raspberry PI, positioned in places without any internet connectivity. So I'm looking for a really cheap internet connectivity solution; using a ...
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0answers
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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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2answers
194 views

Power supply for raspberry pi model b+

I have a 5V/1.5 A power supply lying around. Will this be sufficient for the pi b+ model?
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4answers
24k views

Powering the raspberry Pi from USB + microUSB, is it safe?

I want to power a Pi model B from a powered USB hub. I got surprised that the Pi powers on with only the USB attached. A little search in the forums confirmed me that it is a working solution. I ...
3
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2answers
2k views

5.3v power source into the GPIO

I bought a UBEC (Universal Battery Elimination Circuit), which, for those not familiar with it, is a "5 volt" dc-dc power conversion circuit (you can get them as high as 5A). It gets it's name from ...
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1answer
292 views

raspberry pi rebooting all the time

My Raspberry Pi keeps on rebooting all the time. It boots up just fine, I can use it for some time (3 to 15min), then it reboots. Some of the things I've tried: -Changing the transformer, had a 5V 1....
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4answers
380 views

Powering a stack of Raspberry Pis

I'm looking at putting together a small stack (maybe 4 - 6) of Pis to host my currently externally hosted services, plus a router and a media server. Software setup is not a problem and basic hardware ...
0
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2answers
369 views

contact pin 1(3,3v supply) pin 6(0v ground) reboot [closed]

I want to supply a circuit with these two pins. But when they contact each other my raspberry reboot. Is my raspberry broken?
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2answers
4k views

Powering Raspberry pi with 12 volt input

I am trying popped a transistor while trying to power my raspberry pi from a bread board. I have a 12v battery pack that I am going to use to power my raspberry pi and some servo's. Yesterday I ...
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2answers
219 views

5.3V power source w/ 24kohm resistor

Let me start with mention that I don't know shit about electronics. I bought UBEC to power my RPI but it had output voltage of 5.3V so I decided to use 24kohm resistor to lower it down. Now voltage on ...
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2answers
545 views
0
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2answers
8k views

Reducing 24V to 5V for RPi PSU

I'm trying to power several devices off of a breadboard. For simplicity I want to power these all from the same PSU. The highest voltage amongst the devices is 24V. I was looking to use a 24V 2A (...
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2answers
4k views

Using a Generic Switching Power Supply

I have a generic 5V 10A switching power supply with screw terminals, that looks kind-of like this: Is it safe to use the output from here to drive the Pi by cutting a USB cable and connecting the ...
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2answers
1k views

Is it fine to use an ASUS Memo Pad power supply on a B+ RPi?

I'm about to make my first RPi purchase (a B+) to be specific. I do not want to spend any more than I need to, and hence have looked around to see what power supplies I have that may already work with ...
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3answers
9k views

Powering a 3-12V water pump on raspberry pi

I've got a 3-12V water pump, a raspberry pi, a relay (5V 10A/120VAC, and a breadboard power supply supply 3V-5V. The questions are : Is it possible, to rspi to breadboard power supply usb, and a ...
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3answers
1k views

Power Supply With UBEC

I am currently working on a Wifi controlled remote car powered by Li-po batteries. Can I use a 5V 3A UBEC as power supply for the Raspberry Pi to provide steady 5V and power all devices( 2 IR sensors ...
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1answer
417 views

Minimal setup to output 30V through GPIO

I have a bell that works with a coil and when I put 30V (or more) on the coil the bell rings once. So now I want to be able to control that bell using my Raspi. I have a USB Charger for powering my ...
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0answers
685 views

WIFI dongle extension cable problems

I recently tried inserting a 5M USB extension cable in between my WIFI dongle and my PI, which didn't work, so I removed immediately; but the PI still wouldn't connect following a reboot for ages. ...
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2answers
922 views

The 'ACT' LED is not blinking and the CPU is overheating.

So i was working on a project in which I had to use an ADC. I used WiringPi's Python modules to do so. For testing the ADC, I attached a 100k pot to its input pin, supplied it about 20V but used the ...
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5answers
6k views

Power requirements when overclocking a Pi to Turbo mode

Whenever I enable Turbo mode on my Pi and restart it, it fails to boot. I am currently using a normal 5.0V smartphone charger to power my Raspberry. I am assuming that it is not powerful enough... ...
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3answers
8k views

Power light but very dim act. No display or network output?

When connecting my pi via HDMI, I am getting no image. I can't see any additional devices on my network when connected via Ethernet. LED panel has a strong red light on PWR, very dim green light on ...
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2answers
3k views

Safest way to power a hungry Wifi adapter and the Pi from a single 5V source

My Pi is destined for the skies, so it will receive power at roundabout 5.3V via the BEC (battery eliminator circuit) which will be capable of delivering up to 10A (heavy duty BEC it is), so sourcing ...
1
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1answer
576 views

Are there USB powered speakers with an Analog port? [closed]

I have built a raspberry Pi Jukebox, specially modified for a handicapped user (voice feedback on all songs, large buttons) but I have one.... last.... problem. The speakers I used ran off the analog ...
2
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4answers
291 views

Will my Pi will be fine if I use those el cheapo chinese power adapters? [duplicate]

Title says all. does these cheap power adapters can harm my Pi anyway? and also, lets say these things stop providing less than what required (less than 5v and less than 0.7A), what will happen to my ...
2
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1answer
293 views

Felt current on my Pi, could this have damaged it?

Here is what happened. I have a Belkin Surge Protector. I have connected my iPhone charger (5v 1A) to this and it powers my Pi. I have also connected powered USB hub, transcend hub3k to this surge ...
7
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1answer
10k views

Is SD card corruption still an issue? [closed]

For a project I'm using a 16GB class 10 Sandisk micro SD card (in an Adafruit micro SD card adaptor). I've got a Model B Raspberry Pi that's not overclocked, nor has it ever been. Since I'm running it ...
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2answers
4k views

Is there any point to a 2.0A (or greater) power supply, given the 1.1A polyfuse?

My question: it's my understanding, based on the official Raspberry Pi FAQ, the wiki, and numerous forum threads on Stackexchange and elsewhere, that the Raspberry Pi has a 1.1A polyfuse on the micro-...
2
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1answer
332 views

RPI is rebooting every time I plug in the wireless device?

I encounter a very annoying problem with My Raspberry Pi which is rebooting whenever I plug into it a Wireless USB adapter or an ethernet adapter.
0
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1answer
372 views

Raspberry Pi won't boot up

When turned on, the TV just says "HDMI 3". My power light is stable (red), and the "ACT" light flashes 4 times, then pauses the 4 times... It says the start.elf is not launched, but I can't find a way ...
8
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1answer
18k views

Hard drive not detected by the Pi

My raspberry pi is unable to detect my external hard drive, I'm wondering if I might have messed up in my setup. The hub is connected to the pi in two ways: from the hub to the pi's microusb to give ...
1
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1answer
152 views

Make Pi poweroff secure?

I made a little device that solves a specific task. It gets turned on and off by powering it up and down. Now I had a corrupted file system for the first time. That's why I'm thinking about a strategy ...
3
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1answer
1k views

Raspberry PI freezing

I am working on a project to getting data from serial device and transmit it to web. I am using kernel 3.2.27 with busybox few start up scripts like sysfs and proc, wvdial daemon to dial USB modem for ...
4
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1answer
4k views

Using a Raspberry Pi to manage a bank of several hard drives

I am looking to use a Raspberry Pi as a home file server. I have several hard drives, a Raspberry Pi, an unused computer case, and files that I need to store. I would like to mount all of my hard ...
1
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3answers
293 views

Peripheral power from battery

I'm having trouble powering my pi from 12v 2a battery. I made a circuit using 1117 linear regulator, it's supposed to give 1a current and 5v. Pi powers on normally but any peripherals that I connect ...
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4answers
2k views

Can I use a 5V battery as a UPS?

I have a few backup battery for my mobiles phones. Can I use one of them as a UPS? +--------------+ 5V | | +--------+ from ---> 5V backup | 5V | | ...
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2answers
1k views

Trying to connect a Raspberry Pi and Water Pump with one power source

I am trying to find a way to split one power supply between a raspberry pi and a water pump. This is pretty much exactly what I want to do. http://arpi.valtio.org/files/2013/10/IMG_0891.jpg Notice ...
4
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4answers
6k views

Alternative ways of attaching power to a RPi

I found a nice metal case to house a Raspberry Pi for a project. It has near-perfect dimensions and properties, but it lacks space to attach a power supply via Micro USB. I think the main USB ports ...
1
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1answer
427 views

Power off the “bad way” [duplicate]

My RPi will be used at home (as a Wifi radio unit), without any screen / keyboard / mouse, etc. So very often, me, wife or kids will turn it off by just unplugging the power unit. Will this be a ...
0
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2answers
4k views

Raspberry Pi restarts after connecting 2TB WD My Passport

When I connect my 2TB WD My Passport external USB 3.0 hard drive, Raspberry Pi reboots and fdisk -l does not list the hard drive. I think so there is some problem with my power adaptor, what should ...

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