2020-04-17, 02:29 PM
[quote pid='13376' dateline='1587099870']
Are the 3.3v and 5V pins powered when the pi is powered but the pi is shut down? I want to use a illuminated momentary switch that will tell me the pi is booted up or shutdown
[/quote]
Yes, it appears that when the PI is halted, the 3.3v and 5v supplies continue to supply power to the appropriate pins. I have small fans connected to my 3.3v supply, and they continue to work after a shutdown command is given. I put a GPIO command in rc.local to turn on an indicator light when the PI up, and another GPIO command in ... (darn it, I can't remember where I put it!) to shut off the indicator when the PI is shut down.
I also added a power button that shuts the PI down cleanly, and also brings it up from halt when shorted to ground. Works great.
Are the 3.3v and 5V pins powered when the pi is powered but the pi is shut down? I want to use a illuminated momentary switch that will tell me the pi is booted up or shutdown
[/quote]
Yes, it appears that when the PI is halted, the 3.3v and 5v supplies continue to supply power to the appropriate pins. I have small fans connected to my 3.3v supply, and they continue to work after a shutdown command is given. I put a GPIO command in rc.local to turn on an indicator light when the PI up, and another GPIO command in ... (darn it, I can't remember where I put it!) to shut off the indicator when the PI is shut down.
I also added a power button that shuts the PI down cleanly, and also brings it up from halt when shorted to ground. Works great.