Questions tagged [power-supply]
The methods for powering the Raspberry Pi (typically via its micro-USB connection.)
684
questions
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How can I power a 4B from a DC power supply
I'm making a NAS with a Pi 4B, powered by a Meanwell RS-25 (5v 5a) psu. However, as far as I know, the Pi can only be powered via USB C, but the problem is all my breakout boards are limited to 500ma....
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33 views
Pi 4 doesn't recognise SSD
I bought new Pi 4 8GB from authorised seller including power cable. It recognises HDD and works fine. But it doesn't recognise SSD (crucial mx500 1tb sata 2.5-inch 7mm internal ssd). This SSD works ...
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2answers
44 views
Static Shocks from RPi Issue
my first post here, so hope it's on-topic for the forum.
Straight to the point... I have RPi 4-4GB running Astroberry for astro-imaging. The RPi is in the Argon ONE V2 Raspberry Pi 4 Case, and the ...
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3answers
65 views
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 ...
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2answers
41 views
Raspberry Pi 4b- powerbank measure
I want to power my Raspberry Pi 4b with a powerbank. I know that I need a 3A powerbank.
The question is: How can I measure it? I want to get a percentage of it (which will be displayed over a website)....
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2answers
152 views
How do I interface 3.3 volt devices like (MCP4725 - DAC, A4989 - stepper controller, etc) to raspberry pi WITHOUT using its internal 3.3V power supply
I want to connect MCP4725 breakout to Rpi. The datasheet of MCP4725 says that "the SDA and SCL pins are open drain N channel drivers. Therefore they need pull-up resistors from the Vdd line."...
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2answers
57 views
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 ...
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32 views
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 ...
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1answer
286 views
Sainsmart 12V, 16 Channel relay module connected to RpiZW has unwanted triggering when booting
I'm trying to get the hydrosys4 open source irrigation control software to work with my 16 channel relay board and raspberry pi zero w.
When the pi boots up the relay is triggered multiple times, ...
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0answers
33 views
Receive commands from a smartwatch [closed]
I want to make a smartwatch controlled ATX PSU. If the Pi receives the "on" command from the watch it should pull PS_ON low. If the Pi receives the "off" command from the watch, it ...
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1answer
40 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 ...
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1answer
28 views
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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0answers
74 views
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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0answers
28 views
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 ...
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1answer
79 views
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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2answers
48 views
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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1answer
35 views
Powering raspberry pi using VGA port of a display monitor
Does anyone have an idea if you could use the VGA port of a standard display monitor to power the raspberry pi? Obviously you would need a 'VGA to USB' adapter but then would it be possible
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1answer
29 views
What happens when you overload the 5V pin on Zero W
I am trying to work out what will happen if I power too many NeoPixels from the 5V pin on a Zero.
I understand from the Uberguide that this is the calculation required to work out the power draw:
To ...
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1answer
68 views
Raspberry Pi 3B - Adding extra caps to make more stable power lines?
sometimes a flash on screen appears indicating power supply cannot deliver what Pi needs. Even when I have original power supply ( 3A) and total consumption of Pi doesn't exceed 500 mA. Maybe is power ...
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2answers
45 views
Raspberry Pi Zero W stuck in rainbow boot loop when connected to battery powered power supply
I found that my battery powered power supply was outputting 4.89V after checking it with a multimeter. Is this not enough to power a pi zero? When I plug the pi into the wall everything is fine. ...
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0answers
71 views
Diagnose USB hard drive problems
I have a Raspberry Pi 4B with 4 GB of RAM with the official power supply. Using an old HDD from a laptop I want to build a NAS. The HDD is a Hitachi Travelstar 5K750 750GB and connected with a SATA to ...
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4answers
238 views
Low voltage warning despite using official power supply tested at 5.2V
I bought the Official power supply but when I use it in my Pi 3 model B I get a warning saying: "low voltage, please check power supply".
I have checked the voltage on the Pi using a ...
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2answers
40 views
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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1answer
67 views
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 ...
0
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1answer
55 views
Are there further ideas for a repair of a 3.3V -> 5V shorted pi?
I accidentally shorted my pi's (3 B+) 3.3V and 5V GPIO-Pins.
I was curious how to repair it and found this helpful answer. So I reworked the pi as described: Removed the broken MXL7704-R3, soldered a ...
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0answers
44 views
Upgraded from Wheezy to Buster and now having power problems
I was using a Raspberry Pi 2 B several years ago when Wheezy was the latest version. When I did a clean install of Buster just now and tried to use the Raspberry Pi with some peripherals in my ...
0
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1answer
52 views
Power consumption of APA102C LEDs when turned off? (Pimoroni Blinkt!)
I have the Blinkt! Module for my Raspberry Pi (https://shop.pimoroni.com/products/blinkt) which from what I can tell features 8 APA102C LEDs (Datasheet: https://cpldcpu.files.wordpress.com/2014/08/apa-...
0
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1answer
53 views
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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0answers
57 views
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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3answers
29 views
Avoiding voltage drops when simultaneously using multiple DRV8833 motor drivers
I am using three DRV8833 motor drivers. The power supply is currently a usb cable with the ground and power connected to a breadboard with the three motor drivers attached to them. When powering all ...
0
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0answers
50 views
Raspberry Pi 4 Undervoltage warning even with official AC adapter
My Pi 4 is relatively new and I previously used a 5V 3A tablet charger from an old Huawei device to power it without issue.
Recently, a lightning bolt started appearing at the top right of the screen,...
0
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3answers
155 views
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, ...
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0answers
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MCP3008 Reading Values without Ground
I’ve been building a spectrophotometer the last few months and am confused by the ADC’s behavior regarding grounding. While everything appears to be working properly, including the ADC output, I have ...
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4answers
40 views
Can using a power supply having the correct voltage but an underrated current spec damage a Raspberry Pi?
I have read several similar questions which provide partial answers but leave me with some uncertainty. I am confident I understand that the answers say the probability and severity of damage to the ...
0
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6answers
75 views
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 ...
0
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3answers
37 views
Power Pi3b+ and 24V Amp off same supply
So I've got a few older pcbs for a low voltage tube headphone amp I built years ago - the Millett Hybrid - and was thinking I could put one together with my Pi3,IQAudio hat DAC, and WD passport HDD ...
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3answers
61 views
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 ...
0
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0answers
177 views
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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2answers
66 views
Shields and access/share of power supply for fan
Deconz Raspbee II, Dresden Electronics shields occupy 10 pins of Raspberry PI, including all 5 V / 3 V. At same time the DIN casings for Raspberry PI do often provide, a fan that needs a power supply ...
0
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1answer
70 views
Can We Use A 5.1 3a USB Type-C charger on a Raspberry Pi 4B 8 Gb or 400? [closed]
I am thinking of buying A Raspberry Pi 400 Only Keyboard ( not a kit). So for a power supply I don't want to buy the official power supply, But a adapter and a long cable ( such as here ). Can u just ...
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0answers
34 views
Powering raspberry pi with 7.2 Volt battery and a Buck Converter with 1.5A output
I've connected the Raspberry Pi's 5V and GND to the Outputs of a buck converter(https://www.droking.com/30W-Power-Supply-Module-DC-5-32.0V-to-0-30.0V-Buck-Converter-Adjustable-Voltage-Regulator-DC-12V-...
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3answers
78 views
Power supply raspberry pi 3 with AA batteries
I want to know if it is possible to supply power to raspberry pi 3 with AA batteries.
Some electronic boards like Arduinos contains a voltage regulator. The Vin voltage input can be greater than 5V.
...
0
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1answer
40 views
Should I use an external power supply for controlling 4 servos?
So I have for servos that I could connect to a breadboard and to raspberry pi GPIO 5V pin to power them. But I have read that That is not safe it can damage the pi. Is that true?
instead of using ...
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0answers
38 views
Official power supplies sticking out parts
I have bought a new USB-C power supply for a new RPi and the adapter is significantly smaller than the old micro-USB ones, but to my surprise this new power supply also 'suffers' from the 'oversized ...
0
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1answer
36 views
Raspberry pi 4 power supply without any periphirals
I'm planning to use raspberry pi 4 for homebridge. I will not be connecting any display or any input device and will use ethernet cable for network. will 5v 2amp adapter be sufficient for power?
0
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1answer
69 views
AC adapter for 5.6~11V DC power supply for freenove shield and raspberry pi
I recently bought a little raspberry pi + freenove car kit. The kits instructions are to use two 3.7 V 18650 rechargeable batteries. I have these batteries and everything works fine.
But now I'd like ...
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1answer
284 views
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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1answer
38 views
Supply (under) voltage problem
I have a solid PSU putting out 5.4VDC capable of 60amps/300watts.
I have 5.4VDC going into the Pi3, but get the lightning bolt/undervoltage condition.
On Pins 2 & 6 on the GPIO I'm only getting ~4....
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0answers
25 views
Raspi 2 v1.1 freezes randomly
I set up my old Raspi2 v1.1 a few days ago, but its behaving strange.
It freezes / hangs up after some time.
Things I've tried so far:
Swapped out my sdcard for a different one
Copied the os to an ...
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3answers
432 views
Powering RPi 4 Model B with 5v 3A Car Power Supply Module
I would like to use a buck converter between a 12V DC power supply and my RPi4, and found this car power supply to be appealing. It claims to step down from 12V to 5V 3A, which is almost the same as ...
