All Questions
Tagged with power-supply power
228 questions
0
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21
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Recomended power cable for Rpi 3B+ and official 7" touchscreen [closed]
I have my pi 3b running picore player, with an allo digi-one hat and the official 7" touchscreen.
I have tried using the "official" power supply (x2) individually to the touchscreen and ...
- 1
0
votes
0
answers
18
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Raspberry Pi 4 doesn't show anything on screen a short while after installing the OS
I installed the 64-bit Raspberry Pi OS onto a Raspberry Pi 4B model very recently. Everything worked fine, I installed vscode in it and updated the libraries. However, after shutting it down once, I ...
- 11
-1
votes
1
answer
89
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Does a Raspberry Pi 5 needs the exact voltage for optimal functioning?
Question 1:
I'm planning to power a Raspberry Pi 5 with my old 33W mobile charger. I know that voltage rating is what that matters rather than ampere rating.
This is the rating of my mobile charger: 5-...
-1
votes
2
answers
85
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Powering Raspberry Pi 5B with li-ion battries: Pi 5 just won't boot, stops booting mid-way
I've been pulling my hair for a couple of weeks now. Changed batteries, changed BMS, changed step-down module. No avail.
I am trying to run RPi 5B with 4 li-ion cells in 2S2P config. 2S2P -> BMS -&...
- 121
-1
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2
answers
23
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Powering the Pi and 6 accessories?
I am wrapping up my first Raspberry Pi project. The final version needs to control 3 28BYJ-48 stepper motors and 3 hall effect sensors. In my PoC (with a single motor and hall effect sensor), I have ...
1
vote
1
answer
530
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Alternative Power Supply for Raspberry Pi 5 with 67 watt
I don't know why, but my original Raspberry power supply doesn't work anymore.
I found a power supply at home, but it provides 67 watt instead of the original 27 watt. Is this a problem or could using ...
- 13
0
votes
1
answer
435
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Is the Raspberry Pi 5 Power Supply Compatible to the Pi 4
I need a new power supply for my Pi 4.
Somewhen I will use a Raspberry Pi 5, but it needs the quite special Raspberry Pi 5 power supply.
Is the Raspberry Pi 5 PSU (officially) compatible to the ...
- 105
0
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0
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22
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Ground offset when powering devices directly from 5VDC transformer
I am reading in current sensor (ACS712 20A) values using the MCP3008 ADC into my rpi zero. I am also using a Songle SLA-05VDC-SL-C relay, and have found that both the current sensor being on, and ...
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1
vote
1
answer
550
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Can I use this fast charger for my Raspberry Pi 4? [closed]
It is a fast charger and says 5V/10W and also says 45.0W MAX? Please help me out.
I don't know what to do. Will it destroy my Pi 4?
- 29
-1
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1
answer
42
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Does Pi draw more power when GND is connected to pin 16?
Strange question perhaps, but I was wondering if anyone knows if a Pi would in theory consume more energy when the GND pin is connected to pin #16? I have an interactive piece of software running on ...
- 101
1
vote
1
answer
69
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Powering RPi 4B via USB-C Intermittent
The USB-C port on one RPi 4B is not making a good connection. If I apply side pressure to the USB-C power cord, the connection is made, and the RPi powers up, but when I release pressure it dies again....
- 21
-1
votes
1
answer
323
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Undervoltage with 5V 5A PS
I know this is a subject that is exaustive and at risk of sounding ad nauseam I have to ask because I have no solutions. My pi is reporting undervoltage. I haven't ran into this since using a Pi1 ...
- 107
0
votes
2
answers
297
views
Powering GPIO-interacting sensors with external 3V3
I am using a Raspberry Pi Zero, with an x706 PSU hat (2 x 18650 batteries). The X706 PSU is charged by a good quality, stabilised 5V power supply unit providing up to 3A. The Pi is hooked up to many ...
- 13
0
votes
2
answers
958
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Do I need a on and off button for my power supply?
I purchased this power supply https://www.raspberrypi.com/products/type-c-power-supply/. It’s the official power supply so I thought it would be good. Now I am hearing all these stories about what ...
- 115
0
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0
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43
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How to disable boot when plugged to power? [duplicate]
I want to disable boot of raspberry pi 4B when plugged to power
I have searched a lot and found a similar question, which gives a short and suspicious answer to this problem. If two RUN pins(holes) ...
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1
vote
1
answer
504
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3 12V DC motors on raspberry pi with L298N
Completely new to this stuff. For context, I am trying to connect 3 DC motors that probably are 12v. I haven't bought them yet, they will definitely be more than 5v. I want to be able to control all ...
- 121
0
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2
answers
1k
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Calculating power adapter needs for my Compute Module 4 setup
So I'm finding it a little difficult to figure out how I should be powering my setup. I'll have Waveshares IO board here: https://www.amazon.com/gp/product/B08VJBGD1Q/ref=...
- 9
-1
votes
1
answer
406
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How to turn on a remote battery-operated Raspberry Pi (accessible by Wifi or SSH)?
I am running a cluster of Pi3 and Pi4. Each node runs on a battery and is powered by a solar panel, in a remote area like a farm with no grid. Pis are connected to each other by WiFi in a local ...
0
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0
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18
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Powering a Pi 4 with a small power bank [duplicate]
For my project SamplerBox, I had done many extensive tests in the past and it was possible to successfully power a RPi 2 for multiple hours with such a small 2600mAh power bank (18650-battery inside), ...
- 792
0
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3
answers
195
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Is there any advantage powering up a RPi 4B with a PSU rated for 8A @ 5V?
I have a Raspberry Pi 4B 4GB RAM variant that will be running 24/7 with the following attachments:
an ethernet cable leading to a router for internet connectivity
a 2.5" external HDD attached ...
1
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4
answers
2k
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Low voltage warning powering Raspberry by means of power bank
I'm trying to power my Raspberry 3 model B by means a Catlyn Power Bank 10000mah just purchased and seems to work fine with an iPhone 11.
The problem is that when I connect it to Raspberry, even if ...
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1
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1
answer
138
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Is there a risk for the rpi to be under powered?
I power my RPi 3 from a Meross strip and I often get the small yellow lightning bolt in a corner that indicates that the RPi is underpowered.
I know that this can lead to all sorts of issues with the ...
- 543
1
vote
3
answers
882
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power the logic circuit of an external component with an external power supply instead of the raspberry pi's GPIO
I want to know if is it possible to power the logic circuit of an external component used with raspberry pi not in the way shown below (using the 3.3v or 5v ang GRND GPIO),
but with an external 3.3v ...
- 109
-1
votes
2
answers
1k
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What is the maximum power a Rpi4 can be fed?
I was using a raspberry power supply to power the pi in a setup for 3d printing, a camera and 5" lcd touchscreen run off the pi. I kept getting low voltage warnings so I purchased a 5v 5a power ...
0
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0
answers
43
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Turning switch on lowers voltage from 5.2v to 3.0v
This is probably a simple question, but I’ve researched a lot and haven’t been able to figure out how to fix the problem.
Basically, I have a Raspberry Pi and a 5-inch LCD screen wired to a toggle ...
- 101
0
votes
1
answer
425
views
Raspberry pi voltage between PP3 - PP27 is 0.01V is this normal?
I measured voltage using a multimeter between PP3-PP27 and it was fluctuating between 0.01V to 0.06V is this normal? The entire problem can be found here: USB ports recieving power but not working on ...
- 29
0
votes
1
answer
117
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What would be a good indication to see when it turned off?
my issue is around knowing when the raspberry pi is turned off so I can disconnect it from the power supply.
H.W - Rev 1 B+
Details on LEDs:
PWR LED - ALWAYS ON if POWER SUPPLY IS CONNECTED
ACT(...
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0
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0
answers
2k
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USB ports recieving power but not working on Raspberry Pi 3B
I use external harddisk(connected via USB with its own power supply) to boot into dietpi on my raspberry pi. It works okay for a day(even with multiple reboots and poweroff). But the next day RPi ...
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1
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0
answers
191
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How to power PCA9685
I am using the RP 4B and am trying to control a servo with the PCA9685. Unfortunatelly I am very new to all that and therefore I don't know which specific components I need to power it up. I bought a ...
- 111
0
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1
answer
459
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Can USB ports blow polyfuse on Raspberry Pi 3B?
I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for booting into DietPi with its own power supply and after every day or so all the USB ports ...
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2
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2
answers
3k
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Does Raspberry Pi 3B have polyfuse? Can USB ports blow polyfuse? [duplicate]
Does Raspberry Pi 3b have polyfuse? If it does, under what conditions can it be 'blown'? I suspect my RPi 3b polyfuse to be blown, but I don't know what's causing it. I'm using an external HDD for ...
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1
vote
2
answers
578
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How voltage tolerant is the RPi 3 A+ micro-B USB power connection? [duplicate]
I've been reading about power supply requirements for RPi and want to learn more about the practical limits in addition to the design limits. What is the power protection circuit (if any) on the micro-...
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1
answer
246
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pi 4 - Power present
I am using a pi4 and pijuice.
Is it possible with a script or python to check if power is present in my Pi4?(usb port)
I am using my pi4 headless with as a web server(online). I would like to know ...
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0
votes
1
answer
249
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What power supply can I use for 2 servos?
I am a complete noob when it comes to raspberry. I have 2 servos MG996R that I need to power from an external power supply. Currently I am doing it from the board, and when I turn both of them the ...
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2
votes
0
answers
1k
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how to power a raspberry pi zero w, with a 2x18650 bay, through GPIO
I'd like to wire this bay to the GPIOs of a rpi zero w.
The bay welcomes 2S 2x18,650.
On each cell is written "9800mAh TR 18650 3.7v Li-ion".
My requirements are :
One micro-USB port must ...
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0
votes
3
answers
3k
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Use a usb-c charger with variable voltage for charging Pi4 [duplicate]
I have read here that is possible to charge you pi4 with 3rd party chargers that supply 5V 3A.
I am wondering if I can use this 20W charger, which can deliver differnet voltage level (5V/3A, 9V/2A, ...
- 1
0
votes
6
answers
525
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Could a USB-powered Raspberry Pi emulate a NO momentary switch (PC front panel SW signal) using its GPIO pins without causing damage?
I am trying to use a Raspberry Pi's GPIO pins in conjunction with a normal ATX motherboard's I/O pins (particularly the "power SW" pair) to trigger boot on the PC as though the Pi were a ...
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2
votes
2
answers
100
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Is it okay to use my Raspberry pi3 in low power?
My raspberry always flashes the lightning icon and there's a warning a saying that. Is it okay to use my Raspberry pi on that condition?
Can it damage the raspberry?
I don't have an official power ...
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0
answers
630
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RPI connected to a smart plug -> how to auto turn off plug after RPI shutdown?
In short:
I was wondering if it is possible to send a command to a smart plug when the pi is good to kill it's power.
background
I'm running a 3d printer which I'm going to control with a rpi 4 using ...
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2
votes
1
answer
2k
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Powering Raspberry Pi 4 'on the move' using power bank [closed]
There are good official resources that state that recommended power supply must be 3 amps (e.g. official RPi power supply via mains). However, for use 'on the move' or remote locations this may not be ...
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0
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1
answer
2k
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Monitor the power consumption in real-time (in Ampere or Watt)
I'd like to monitor in real-time the power consumption of a RPi.
(0.5A, 1A, 2A, etc.)
I know this can be done with a multimeter in ammeter mode in series, but I thought maybe there is an easier method,...
- 792
1
vote
1
answer
517
views
Should I power RaspPI + peripherals from hub or use GPIO?
I’m planning my first “proper” Raspberry Pi project.
I want the end result to be user friendly, and so should use only a single power source.
But internally I need to power several separate devices: ...
- 113
4
votes
4
answers
3k
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Powering Raspberry Pi via battery pack and buck converter - how to solve low voltage reboot issues
I'm trying to power a Raspberry Pi 4 via a 6-AA battery pack via buck converter which steps it down to 5V but it gets stuck in a reboot loop on boot up.
Watching the display on the buck converter, the ...
- 143
1
vote
1
answer
149
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Pi Zero with RS-485 interface operated inside breaker panel crashes
Setup
I am operating an Raspberry Pi Zero inside a distribution board. The pi is powered via usb using a din rail power supply and it connected to an usb-rs485-adapter to get modbus data from a smart ...
- 111
1
vote
0
answers
84
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Physically turn the Raspberry Pi Touch display on and off with a switch
I use a Raspberry Pi Touch Display that I connect like shown in the following picture to my Raspberry. The black and red wires are connected to thee GND and 5v pins respectively. Now I want to ...
- 21
3
votes
1
answer
205
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Can RPi 4 deliver more amps on the 5 volt rail than RPi 3 powered over PoE?
I have a setup using a Raspberry Pi 3B.
I use the PoE hat on top and I power the entire setup over PoE from a Unifi switch.
The setup has quite a lot of peripherals that need power and I use the 5 ...
0
votes
2
answers
2k
views
Red Led flashing
I have a PI 4, WHEN using a 3.5A USB power measured 5.1v supply, the red LED is constantly on. When using a power supply which was rescued from a DVD player, checked supply 5.1v I get a flashing red ...
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0
votes
1
answer
95
views
How should I power multiple RPi 3 units from a beefy power supply? [closed]
I have to power 20 Raspberry Pi 3 units from a few 5V 10A power DC power supplies. I have little experience in electronics. The RPis can be up to 1.5m apart from one another. A friend of mine ...
0
votes
1
answer
186
views
Mirabox Capture Card and External Power Source
I'm looking to power my Raspberry Pi 4B from a 12V tractor battery. I have a buck converter which can be found here. I am considering using this device to step-down the battery voltage and hook up the ...
- 55
4
votes
3
answers
3k
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Constant undervoltage, despite meter showing otherwise
I have a Raspberry Pi 3B+, running Raspbian.
Linux raspberrypi 4.19.97-v7+ #1294 SMP Thu Jan 30 13:15:58 GMT 2020 armv7l GNU/Linux
It server primarily as a MagicMirror2 machine.
I can see the ...
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