[Guide] Graceful shutdown switch without Pololu [RETIRED]

[Artist_block]

@Camble Thank you

[GASMAST3R]

hallo sorry for my bad Englich

I have make the graceful shutdown but can use gpio 22 and 27( i use Recalbox gpio pad)

waht i make doo, waht gpio i can use now

[Camble]

@GASMAST3R You can use any other BCM pins, just remember to change the power monitor script.

https://pinout.xyz

[GASMAST3R]

hy i have make it @ main Page

Once you've built the circuit, add the following line to /boot/config.txt. This will keep the JFET off while the Pi is powered.


Code: Select all

dtoverlay=gpio-poweroff,gpiopin=22,active_low="y"


Steps:
• Open /boot/config.txt


Code: Select all

sudo nano /boot/config.txt

• Scroll down, there should already be a #dtoverlay entry.
• Type the new line of text.
• Press Ctrl+X to exit, hit Y to save and press return.
• Reboot your Pi.


the power monitor script.?????????????

[myPiZero]

I made a simulation of this circuit.
http://www.falstad.com/circuit/circuitj ... 2+352+0%0A

You can see that the keep alive signal prevents the power boost from shutting down

[Camble]

@myPiZero My favourite web-based circuit simulator. Good job!

[Treguard]

This guide explains how to build a very simple graceful shutdown circuit to your GameBoy Zero. It assumes you are using the Adafruit Powerboost 500C or 1000C.

Many thanks for the guide. I was just wondering if this could be used if you decided to just power the pi off the mini USB port connected to a mains socket?

[Camble]

@Treguard That will also work.

[Treguard]

@Treguard That will also work.

Thanks. If I do that, would I just not connect the EN and GND at the top right of the circuit diagram?

[Camble]

@Treguard I must have misread. If you power the Pi directly from USB, it will be constantly powered. If you connect micro USB to the PowerBoost (which it has), the shutdown circuit will work as intended. Basically, use everything through the PowerBoost and you'll be fine.