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Author Topic: Another power button question  (Read 501 times)

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Major

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Another power button question
« on: December 27, 2018, 01:08:48 pm »
Hello all!

I am making a bartop arcade for my kids and have concerns about shutting off the pi correctly. (they will inevitably forget to either exit correctly or push the shutoff button before killing power to the whole arcade)

I have thinking of ordering one of these:

https://www.crowdsupply.com/silicognition/lifepo4wered-pi-plus

It's a tad expensive though (and doesn't ship until later in January) and wonder if I couldn't accomplish the same thing with this:

https://www.amazon.com/Makerfocus-Raspberry-Pi-3-Remote-Power-Button-for-RPi/dp/B01LAEX7J0/ref=cm_cr_arp_d_rvw_txt?ie=UTF8&th=1

In the questions the Seller states that it can't (currently) send a loss of power signal to the pi but couldn't I send one from the cabinet switch?

So when power to the cabinet is switched off it also sends a shutdown command to the pi while the Makerfocus keeps the pi up until it completes it shutdown sequence.

Would that work or would it be more hassle than its worth?


Thanks in advance!
Major

RxBrad

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Re: Another power button question
« Reply #1 on: December 28, 2018, 02:52:08 pm »
Those items you linked seem to be more focused on handoff between AC and battery power. 


Maybe a shutdown switch module is more what you're after? Something like this?


https://othermod.com/product/advanced-onoff-board/


Here's another version that doesn't require soldering, but appears to be out of stock...


https://othermod.com/product/onoff-board-with-usb-connectors/

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Re: Another power button question
« Reply #2 on: December 28, 2018, 03:57:12 pm »
Hello all!

I am making a bartop arcade for my kids and have concerns about shutting off the pi correctly. (they will inevitably forget to either exit correctly or push the shutoff button before killing power to the whole arcade)

I have thinking of ordering one of these:

https://www.crowdsupply.com/silicognition/lifepo4wered-pi-plus

It's a tad expensive though (and doesn't ship until later in January) and wonder if I couldn't accomplish the same thing with this:

https://www.amazon.com/Makerfocus-Raspberry-Pi-3-Remote-Power-Button-for-RPi/dp/B01LAEX7J0/ref=cm_cr_arp_d_rvw_txt?ie=UTF8&th=1

In the questions the Seller states that it can't (currently) send a loss of power signal to the pi but couldn't I send one from the cabinet switch?

So when power to the cabinet is switched off it also sends a shutdown command to the pi while the Makerfocus keeps the pi up until it completes it shutdown sequence.

Would that work or would it be more hassle than its worth?


Thanks in advance!
Major
Get one of these: https://blog.petrockblock.com/2015/07/04/powerblock-another-power-switch-for-the-raspberry-pi/ or https://blog.petrockblock.com/2014/12/29/controlblock-power-switch-and-io-for-the-raspberry-pi/ or http://mausberrycircuits.com/

You will power down the RPi safely. If you use a master-slave power strip to power your other devices within your cab, you'll be fine. Everything will be powered up and down by one switch. The only switch your kids can (mis)use. I don't even use the power strip as I will leave everything in stand-by anyway. Marquee lights etc. are switched by a separate switch as I like to keep them on sometimes when the cabinet is off.

ark_ader

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Re: Another power button question
« Reply #3 on: December 29, 2018, 08:57:16 am »
I have been trying to get this to work too.

I ended up getting this.

So simple now.
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Grasshopper

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Re: Another power button question
« Reply #4 on: December 29, 2018, 12:43:00 pm »
Do you need savestates and the ability to change config settings?

If you don't, then IMHO it's better to make the root filesystem read-only. If you do that, then there's no danger of corrupting the SD card if you cut the power without doing a clean shutdown.

I've tried the following tutorial with my Retropie image, and I can confirm it works.

https://github.com/janztec/empc-arpi-linux-readonly

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Major

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Re: Another power button question
« Reply #5 on: December 29, 2018, 01:25:51 pm »
Hello all!

I am making a bartop arcade for my kids and have concerns about shutting off the pi correctly. (they will inevitably forget to either exit correctly or push the shutoff button before killing power to the whole arcade)

I have thinking of ordering one of these:

https://www.crowdsupply.com/silicognition/lifepo4wered-pi-plus

It's a tad expensive though (and doesn't ship until later in January) and wonder if I couldn't accomplish the same thing with this:

https://www.amazon.com/Makerfocus-Raspberry-Pi-3-Remote-Power-Button-for-RPi/dp/B01LAEX7J0/ref=cm_cr_arp_d_rvw_txt?ie=UTF8&th=1

In the questions the Seller states that it can't (currently) send a loss of power signal to the pi but couldn't I send one from the cabinet switch?

So when power to the cabinet is switched off it also sends a shutdown command to the pi while the Makerfocus keeps the pi up until it completes it shutdown sequence.

Would that work or would it be more hassle than its worth?


Thanks in advance!
Major
Get one of these: https://blog.petrockblock.com/2015/07/04/powerblock-another-power-switch-for-the-raspberry-pi/ or https://blog.petrockblock.com/2014/12/29/controlblock-power-switch-and-io-for-the-raspberry-pi/ or http://mausberrycircuits.com/

You will power down the RPi safely. If you use a master-slave power strip to power your other devices within your cab, you'll be fine. Everything will be powered up and down by one switch. The only switch your kids can (mis)use. I don't even use the power strip as I will leave everything in stand-by anyway. Marquee lights etc. are switched by a separate switch as I like to keep them on sometimes when the cabinet is off.

Thank you!

I had no idea they had power strips like that!

I'll give that a shot and see how it works.


Thanks again,
Major

DaOld Man

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Re: Another power button question
« Reply #6 on: January 04, 2019, 09:20:46 pm »
This board looks promising, quite a bit cheaper than the mausberry. I may give it a test drive on my next project.

https://www.adafruit.com/product/3581