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

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3
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2answers
44 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? ...
1
vote
1answer
51 views

Pi 2 Question about power

I currently own a "WD My Passport Ultra 2 TB", It needs 500 mA to run. I only have a usb adapter that supplies my pi (2 b) with 1A. Would getting a better adapter allow me to power the 2TB drive? If ...
0
votes
2answers
48 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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2answers
33 views

Are there any battery packs than can act as a UPS? [closed]

I have an external battery pack, for my phone - it charges via USB. I was thinking I could use it to power my new Pi Zero - if the power goes out - but I realised the one I have cannot be charged and ...
1
vote
4answers
164 views

Red LED after `sudo halt`, may I unplug?

I flashed Raspbian and I use my Pi headless, connecting via SSH. To power it off I do sudo halt, which disconnects me from the SSH. After a few green led blips I have steady red led on. Does it mean ...
0
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2answers
41 views

Can I use a Y-cable or Dual-Power cable to get additional power for a single USB powered hard drive?

I'm planning to attach multiple portable 2.5" hard drives to a Raspberry pi 2 Model B. The problem is, the only power source of such hard drive is the USB port it is connected to. In short: They would ...
0
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1answer
72 views

Is there a way to add power button on RPI 2 Model B? [duplicate]

Me and my dad were been looking for making small Pi to bigger Pi out of old PC case from 2004. So I thought that I need power button to power Pi but it's in the PC case so I took those but then i ...
0
votes
1answer
27 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 ...
3
votes
1answer
343 views

Common ground with 9V?

I'm new to pi's extending. I've a MB102 breadboard, coupled with a powersupply. I plugged a 9V power supply, and it's working (powersupply => resistor => led on). I'd like to interface some ...
3
votes
2answers
217 views

2 amp power supply for RPi2. Too much current?

I'm currently using a 5V 2A power supply; not sure if it is appropriate because some answers say that the max safe current is 1.2 amps. I'm a little confused about this. Is it safe to use my current ...
0
votes
1answer
26 views

How to measure battery voltage?

I'm using a battery as my power supply. Is there any command or library to check the battery voltage? I want to monitor the battery discharge.
1
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1answer
39 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 ...
3
votes
1answer
36 views

Unknown fuse blow out in custom power board for raspi B cluster

I've been trying to adapt the design for power distribution layed out in this raspi cluster design. . While looking through the researcher's design, I couldn't find any use for jumpers 2 and 3, ...
6
votes
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 ...
0
votes
1answer
72 views

Best Portable Power output for Raspberry Pi 2 Model B

I want to make my device portable and looking for portable power. I read in the specification that my Raspberry Pi 2 Model B needs 5v and 1.8A output for work. I have a number of power banks that have ...
1
vote
0answers
55 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 ...
6
votes
2answers
307 views

Can I use a DC-DC step up module to power a Raspberry Pi from 2AA batteries?

I understand that I can use 4AA batteries and a step down module to get 5V and power the Pi, however briefly. However, now I'm getting real outrageous and want to trying powering the Pi from just 2AA, ...
1
vote
1answer
36 views

Will this DC step down chip allow me to power Raspberry Pi using AA batteries?

I understand that typical alkaline batteries lose voltage as they die, making them a poor choice for sensitive electronics without proper handling, and that lithium AA batteries are usually slightly ...
1
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7answers
1k views

What can I use to power my Raspberry Pi Zero with rechargeable battery?

Is there a 5 V rechargeable battery and cables compatible and comparative in size with Raspberry Pi Zero? I don't want to have to plug my Raspberry Pi in every time and nonrechargables get ...
0
votes
0answers
28 views

Faint green blinking light after a while

My Raspberry Pi doesn't respond after a while, and the green LED just periodically blinks very faintly. I can't SSH into it, but if I connect it to a screen, it will show the console. The only USB ...
3
votes
1answer
79 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 ...
1
vote
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
votes
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. ...
5
votes
2answers
108 views

Powering Raspberry Pi Zero and a HUB with one charger (3 in 1 cable)

I'm planning to buy the latest Rasbperry Pi (Zero) and I'm trying to figure something out. Let's assume I have a decent power supply (2A) and I'm using this cable for powering it and powering an USB ...
6
votes
3answers
1k views

Raspberry pi power

I'm using Raspberry pi2 for my mini projects. But i found different behaviour of raspberry pi powering. Red led constantly glows and green LED flashes, and rpi is working fine. Red led does not ...
4
votes
3answers
83 views

Possible to power a Rasberry Pi Zero or B+ plugged in via an Ethernet port?

I want to build a device using a raspberry pi where you plug in the ethernet port into any ethernet port device and then from the raspberry pi it routes it back into the same device. Say for example: ...
7
votes
2answers
131 views

How does init get to know about power events?

I have a Pi Model B Rev 2.0 (I think) and I intend to use it for a Home Automation system. As I have a prepayment meter on my electricity supply I occasionally run out of electrons to go around my ...
1
vote
1answer
65 views

What's the maximum safe power supply voltage through GPIO?

What is the maximum safe voltage to supply to the RPi when powering it through the GPIO pins? Due to size restraints in a project, I need to supply power to my RPi through the GPIO pins instead of ...
0
votes
0answers
22 views

USB power doe Arduino

How good is the power regulation on a RPi 2 ? I have a small robot controlled by an RPi2 and some Arduinos, and have two choices to power it (the Pi, that is). I can make a dedicated 5V regulated ...
1
vote
1answer
190 views

Powering Raspberry Pi Zero from a USB Power Bank

I want to purchase a USB Power Bank, one of the tiny portable ones, to power my Pi Zero, I need it to last at least 12 hours, but preferably 15 hours, for a comfortable safety cushion of time. My Pi ...
1
vote
1answer
41 views

Can I power two RPI2MBs via an Orico 10 port powered usb hub?

I have an Orico 10 port USB3.0 powered hub that I bought a while back, and have recently come into possession of a pair of RPI2 Model Bs. I was wondering how the "power distribution" on hubs worked; ...
2
votes
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) ...
1
vote
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 ...
0
votes
0answers
10 views

Make a temperature control unit [duplicate]

I have got two sensors that give a resistance as function of the temperature. I would like to see the device switching on the power for a power outlet when the temperature difference is larger than a ...
2
votes
1answer
81 views

Power on/off button [closed]

Are there any alternatives to Raspberry Pi that have integrated power on/off button? In the past i managed to do it designing a small circuit, bypassing the power source with a relay, pulling down ...
0
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0answers
37 views

Why sensors malfunction using an external power supply?

So i have my raspberry 2 ready to read from a GPIO the outout of a motion sensor from parallax (PIR Sensor Rev B 555-28027)using the usb port from my computer. it works prefectly using the 5V or the ...
1
vote
1answer
57 views

Raspberry Pi only red power light after sometime?

While running raspberry Pi 2 for long, there often happen to be some power fluctuations that cause only red light to be turned on and the system not working until I turn off and on the power supply to ...
0
votes
1answer
53 views

RBP 2 Power supply and outputs

So If I have an 2 amp power supply I can use 1.2 amps on all 4 usb ports and 0.8 for the rest right? But if I use an 3 amp power supply can I then use 1.2 for usb and 1.8 for the rest or 2.2 for all 4 ...
0
votes
1answer
27 views

How should I connect the power?

I have a B+ connected to a H-bridge which is connected to 4 AA batteries and 4 motors, and they work fine, but now I want to add a distance sensor, which requires 5v, so do I need any extra batteries? ...
3
votes
1answer
225 views

Raspberry Pi (Low) Power - Damage?

If the Raspberry Pi B+ is not receiving enough power and I try to use it, will it damage my Pi or peripherals?
2
votes
2answers
270 views

How to control a 3V laser from GPIO

What's the best way to control (turn on and off) a low-power 35mA 3V laser from a Raspberry PI GPIO pin? The RPi GPIO pins support the right voltage but each can supply only a maximum of about 16mA, ...
0
votes
0answers
58 views

Measure input voltage of Raspberry Pi B+ running Ubuntu

I just learned that a red flashing LED indicates voltage below 4.63V on a Raspberry Pi Model B+. Thus, the Pi seems to "know" about it's input voltage. So my question is: Is there a command to ...
1
vote
2answers
129 views

How to detect, if something is not working properly?

I've bought a Raspberry PI 2 a month ago. Everything worked fine. I've reinstalled it sometimes. But I've noticed that now it's slower than before, and freezes more often. Is it a program, using I ...
0
votes
1answer
112 views

Split output from portable laptop charger [closed]

I'm looking for a safe way to power two devices from my portable power source which only has one output. The power source is a Intocircuit® Power Catsle 26000 mAh External Batter. Which can output ...
2
votes
2answers
247 views

How can I replace “Wireless Remote Control Switch” with Raspberry Pi?

I am looking for a solution where I can control a "8 Channel Relay" (Link: http://www.amazon.in/channel-control-optocoupler-ARDUINO-Raspberry/dp/B00YY0SYFU?tag=googinhydr18418-21) wirelessly by using ...
3
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0answers
86 views

Raspberry Pi - 4 blinks

I'll start by saying that I probably shorted something to cause this. I noticed this behavior the next morning after spilling some water next to it. I didn't think any got on it through the holes in ...
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vote
2answers
89 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 ...
2
votes
4answers
598 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
102 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 ...