Questions tagged [power-management]
Power Management is a feature of electrical appliances to enter a low-power state when inactive to reduce energy consumption.
190 questions
-1 votes
2 answers
66 views
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 ...
0 votes
0 answers
89 views
Using a Power-on and Shutdown button with the HyperPixel4 touchscreen
I am trying to wire up my Raspberry Pi 4B to have BOTH the HyperPixel4 touchscreen and a power-on button as well as a shutdown button (From my understanding I cannot have one for both operations ...
- 101
1 vote
2 answers
4k views
Raspberry Pi 5 Reboot Instead of Shutdown
Yesterday I noticed that I could not access the device which is far away and when I went to check it, the power led was red and only turned back on when I pressed the power button. I didn't find ...
- 11
0 votes
1 answer
397 views
Console (not X/Wayland) screen blanker ineffective under Bookworm?
Note that I am not running X or Wayland. This is about the hardware text console. I have a pair of Pi 400s with HDMI connected monitors. If I add consoleblank=300 to cmdline.txt, what happens is that ...
- 410
0 votes
3 answers
4k views
Raspberry pi 5 UPS and li-ion battery
Is there a UPS and lithium ion battery combo that works on the raspberry pi 5? I have looked around, but I can only find information on the RTC clock battery. I know the voltage and ampere output for ...
- 9
0 votes
0 answers
429 views
One button for on/off of Raspberry Pi 4, still using i2c
I can't find any additional information online, so I'll try to ask it directly. I would like to put the Raspberry Pi 4 (with Lineage OS) in a case and be able to turn it on and off using just one ...
0 votes
2 answers
2k views
How do I prevent raspberry pi automatic turn on when I connect the power plug?
I connect the power in plug. After that raspberry pi automatically turn on . But I want it to be on when I press the button, how can I do this?
-1 votes
1 answer
94 views
Can I power my PI via USB if I Disable USB?
I learnt that I can disable the USB circuitry with this command: echo '1-1' |sudo tee /sys/bus/usb/drivers/usb/unbind Does doing this disable USB power too? Or just data/connectivity? I would test ...
- 101
0 votes
3 answers
2k views
How to turn off the Raspberry Pi fan when shutdown
I purchased the official raspberry pi 4 fan and follow the documentation to setup the fan. The fan turned on in the beginning when power on my raspberry pi 4 then it's off after finish boot up. When I ...
- 1
0 votes
2 answers
3k views
Questions on dtoverlay gpio-poweroff
I'm working on a soft-latching power control for my raspberry PI project. I want to use the 'gpio-poweroff' overlay to cut all power after the system gracefully shuts down. I have it working, but I'm ...
- 11
0 votes
0 answers
28 views
Dead Raspberry Pi, Rev 1.4, please help me identify model of the chip [duplicate]
Hi! I am trying to fix shorted out Raspberry Pi 4B and I identified this chip as bad (Running extremely hot while Raspberry looks dead). The chip itself is scratched and protected from reading model ...
- 1
1 vote
0 answers
198 views
Powering Raspberry Pi 3B+ with Multiple Attachments: Recommendations for Portability
Ok so I'll try and keep this short and sweet. Basically, I have all these attachments for my Raspberry Pi 3B+ Raspberry Pi 7" Touchscreen Case for Touchscreen w/ Cooling Fan Raspberry Pi Camera ...
- 11
3 votes
6 answers
672 views
I need a seemingly large battery for project containing several sensors, what should I do?
I'm working on a project with several sensors needing various 3.3v and 5v power. I'd like to have my sensors running for at least 24 hours before needing to recharge everything. I did the calculations:...
- 151
0 votes
0 answers
2k views
Disable permanently wifi power management
After adding sudo iwconfig wlan0 power off to /etc/rc.local, I checked whether it has been applied with iw wlan0 get power_save. I notice that indeed it has been applied cause I get Power save: off. ...
- 115
0 votes
1 answer
141 views
LiPo Battery HAT behavior
I was reading the description for LiPo Battery HAT for Raspberry Pi and it at best seems very unclear to me: This is not a UPS! The Raspberry Pi will restart when you connect it to the Pi. What does ...
- 115