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101 votes
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Raspberry Pi Power Limitations

Power requirements of the Pi Raspberry Pi Ltd. (Raspberry Pi Ltd.) has recommendations for various models which range from 700mA to 3.0A. These are quite generous, and all models will operate on a ...
Milliways's user avatar
  • 60.5k
31 votes

Undervoltage warning despite decent power supply

The APX803 chip (which monitors voltage) triggers at 4.63±0.07V. This is an instantaneous level, whereas your meter will show average. Even assuming your meter is correctly calibrated the trigger may ...
Milliways's user avatar
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28 votes

Raspberry Pi 3 vs Pi 2 power consumption and heat dissipation

When shutting down the HDMI and USB on the Pi3, the current drops to 160 milliAmps. In my tests, this was roughly 200 milliAmps on the Pi2. Thus, shutting down hardware (if you don't need it), can be ...
Roel Baardman's user avatar
26 votes
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Can I power a Pi through a 5V pin?

This pin is directly connected to the 5V net, meaning indeed it is possible to power through that pin. When under USB power, this net is supplied by USB power, but there is no reason you couldn't ...
crasic's user avatar
  • 3,003
26 votes

What is the highest voltage from the power supply a Raspberry Pi 3 B can handle without getting damaged?

No, you should not increase the voltage any further... and at least this answer linked in the question does not suggest to do that. From Raspberry Pi Power Limitations: Power sources SHOULD ...
Ghanima's user avatar
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22 votes
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Use MacBook charger for Raspberry Pi 4

NOTE: Please read the Follow up, 14 Aug 2020 near the end of this post. The "Raspberry Organization" has released revised hardware for the RPi 4B that you should know about before buying. ...
Seamus's user avatar
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20 votes
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Raspberry Pi 4: turn red LED off (via software)

Should work by writing the appropriate value to /sys/class/leds/led1/trigger on older OS. Use /sys/devices/platform/leds/leds/PWR/trigger on kernel6 which replaced the confusing led1 with explicit PWR ...
Dirk's user avatar
  • 3,541
19 votes
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Dangers of Underpowered Pi?

The main risk I can think of is file system damage. Your Pi is reasonably likely to unexpectedly shut down in the event of insufficient power. If you (or a background process) happened to be in the ...
goobering's user avatar
  • 10.7k
18 votes

Undervoltage warning despite decent power supply

In such cases, please have a look at the USB cable, they have often a high internal resistance which causes the voltage drop. For USB data it's not a problem, but for USB Power (if the connected ...
MrPeak's user avatar
  • 181
17 votes
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Rpi freezes every now and then, how to fix it with a watchdog?

Before you go looking into additional hardware, please read up on what's called a "watchdog timer". The Raspberry Pi has a hardware watchdog built in that will power cycle it if the chip is not ...
berto's user avatar
  • 1,231
17 votes

Powering the Pi 4 - safe voltage levels and current requirements

Voltage level The power management IC (PMIC, see section 3) is a MXL7704 with an input voltage range of 4.0 V to 5.5 V and an absolute maximum rating of 6 V that must not be exceeded. Considering ...
Ghanima's user avatar
  • 15.9k
16 votes

What is the highest voltage from the power supply a Raspberry Pi 3 B can handle without getting damaged?

The MAXIMUM is 5.25V, although this should NOT be the target. You should not apply more than 5.1V That is not to say the Pi will be damaged by the higher voltage, because nothing uses 5V - the on-...
Milliways's user avatar
  • 60.5k
14 votes

rPi2 model B v1.1 smoke comes out near power port

The Raspberry Pi requires 5 Volts - if you've fed it 12 Volts you've killed it. Powering the Pi using the GPIO pins bypasses the fuses that might have saved the Pi if you had used the micro USB ...
CoderMike's user avatar
  • 6,997
13 votes

How do I modify my Raspberry Pi to be powered over PoE?

The Raspberry Pi 3 Model B+ (March 2018 blog announcement) and later devices support PoE with an official PoE HAT. Unlike after market PoE HATs for models before the 3B+, the new PoE HAT uses the on-...
Mark Booth's user avatar
  • 4,370
13 votes

Powering Raspberry Pi 3 from another Raspberry Pi 3

You may not blow anything up, but it is still not a good idea. The Pi-3 has a 2.5 amp polyfuse which means that those 2.5 amps would need to be shared between the 2 Pi's. A quick look around this site ...
Steve Robillard's user avatar
13 votes
Accepted

DIY uninterruptable power supply (UPS) for Raspberry Pi Zero

Absolutely DO NOT connect the battery in parallel with the load. The charger will not know if the battery is full or not and will continue to pump power both to the battery and the step-up converter. ...
Aloha's user avatar
  • 7,156
11 votes
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Powering Raspberry PI With Broken Micro USB Connector

This qualifies under category circuit rework. The "best" solution, if the pads are still usable, is to purchase the replacement part and re-attach it. The part is about $1 USD but this does not ...
crasic's user avatar
  • 3,003
11 votes

Choosing a Pi4 power supply

Use a PoE Hat: Third-party USB-C charging devices can be cheaply wired, potentially destroying connected devices as well as starting fires. A safer alternative is to power your Pi using PoE which ...
F1Linux's user avatar
  • 1,667
10 votes

Raspberry Pi 3 Model B+ Stable Red Light When Powered Up

Seems there is no problem at all with your Raspberry Pi. A constant red light, the PWR led, indicates that your raspi is properly powered up. With a bad power supply it would flash below 4,63 V. So ...
Ingo's user avatar
  • 42.2k
10 votes
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Power Pi4 with USB-C Power Bank

Intro: Many of my contributions to this forum have centered around innovative ways to power a Pi which is awkwardly out of reach of a mains socket, specifically using POE. But what do you do if ...
F1Linux's user avatar
  • 1,667
10 votes

Constant undervoltage, despite meter showing otherwise

Get a better cable. Most PSUs guarantee the voltage only on the USB-Port. If you use the official Rasperry Pi PSU on the other hand, it guarantees your the voltage on the Micro USB plug. Depending on ...
kwasmich's user avatar
  • 2,702
9 votes

Undervoltage warning despite decent power supply

I would suggest that your power supply is the problem. I had exactly the same issue on my Pi 3 with a power supply I sourced on Ebay rated at 2.1A/5V, I tried an official 2.5A/5.1V supply and all my ...
robosnacks's user avatar
9 votes

Powering Raspberry Pi 3 from another Raspberry Pi 3

I think as per the other answers this is feasible in theory, but may not work out well in practice. I'm reproducing this graph from an article in our blog, Exploring the 3.3V Rail (thanks PM). Note ...
goldilocks's user avatar
  • 59.3k
9 votes
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Choosing a Pi4 power supply

The best option is a good quality power supply, as cheap brands may say they are rated at 2.4 amps, when they don't actually supply that much. Based on the numerous bad experiences i've had with 3rd ...
nikodean2's user avatar
  • 180
9 votes

how does the Raspberry Pi PoE shield work?

what are the 4 POE pins on the raspberry PI? They are the four cable side center taps off the Ethernet magjack. what does the PoE hat do? Broadly speaking it Rectifies the incoming power from ...
Peter Green's user avatar
  • 6,486
9 votes
Accepted

Pi 4 maximum power consumption

The "maximum theoretical power consumption" depends on device junction temperatures, thermal conductivity, air flow, etc, etc. I don't think that's what your question is really after - but ...
Seamus's user avatar
  • 22.4k
8 votes

How much energy does the Raspberry Pi consume in a day?

Power Consumption Benchmarks The instrument used to measure power consumption with the Dramble and individual Raspberry Pis: PowerJive USB Power Meter In all measurement cases, nothing is plugged ...
Raghav Dinesh's user avatar
8 votes

Undervoltage warning despite decent power supply

Indeed, this problem is, 9 times out of 10, the cable. Even when you may think it can't be. I recently tacked this issue with a very good power supply (12V, 2A) through a 3A 5V switching regulator, ...
Majenko's user avatar
  • 246
8 votes
Accepted

Can I power a Raspberry Pi 3 with a Smart TV's USB-Port?

According to the Raspberry Pi FAQ on Power requirements ( which can be found here --> https://www.raspberrypi.org/help/faqs/#powerReqs ): Maximum draw from USB = 1.2A Recommended Power Source =...
Jaxian's user avatar
  • 206
8 votes
Accepted

Is a 2.4 A 5V USB charging port enough to drive a Pi 3?

The recommended supply is in fact the maximum amount of current that the Pi 3 can use; if you try and draw more than that you risk tripping the main polyfuse. On other models this is actually 2 A. I ...
goldilocks's user avatar
  • 59.3k

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