Is there a power button available for the Raspberry Pi 3?

Question

I was looking for a power switch or button for the Raspberry Pi 3. Does anyone have a recommendation on a good switch?

clem57 · Answer

To allow a clean shutdown, check this hardware and software solution Raspberry Pi Shutdown Button - All

kravex · Answer

https://retropie.org.uk/2016/05/power-switch-for-your-arcade-machine-the-powerblock-got-an-upgrade/ RetroPie have an article about a power switch, hope it helps.

rsc · Answer

I found my "micro" power switch....

clem57 · Answer

https://www.pi-supply.com/product/pi-supply-raspberry-pi-power-switch/

alanmcdonley · Answer

I'm using the Pololu SV Push Button Switch ( $7 ) on my Pi Robot. One press on, One press off. It is a single pole 10A (and can be ganged) Configuration gets me current and voltage, and one button on/off: EBL 5000mAh Ni-MH C Batteries: $25 15Dec2014 Raspberry Pi B+ 512MB Pololu S18V20F5 5v 2A Step-Up/Step-Down voltage regulator Pololu SV Pushbutton power switch Fair Top 5A Current Sensor Module ACS712 Mikronauts.com Pi Droid Alpha interface card (MCP3008 Analog Digital Conversion) Just published a battery life report on my blog: Rug Warrior Pi: Life in 10 Hour Segments

jackpiguy · Answer

saw this PiSwitch with Remote Control on kickstarter https://www.kickstarter.com/projects/1400964434/hackable-raspberry-pi-power-switch-with-remote-con It's already successfully funded, and i had just purchased a set from their Store .

jkutzsch · Answer

The latest MagPi magazine has a how-to on page 50 for putting in a power switch. https://raspberrypi.org/magpi-issues/MagPi57.pdf

jgcobra · Answer

Hi Shabaz, I honestly don't know for sure what the technical details are as to why shorting pins 5 and 6 cause it to boot. I found that info on various forums like this one. I assume that the Pi must pull up pin 5 when it shuts down. My shutdown script essentially executes 'shutdown -h now', which safely shuts down and cuts power to the USB ports (which is ideal for me because I'm powering arcade controller button lights from the USB). My original version didn't have the diodes or pin 13 connection, and I just used pin 5 in the script. This worked fine, however pin 5 is a bit of a 'special' pin, and a lot of hats seem to use it, which is why I decided instead to use pin 13 for shutdown detection. If you are doing a really simple project with no hats then you can just use pin 5 for both boot and shutdown, with no diodes.

jgcobra · Answer

mcb1 wrote: Nice to find out ...google provided the following https://elinux.org/RPI_safe_mode#Wake_from_Halt.5B1.5D https://raspberrypi.stackexchange.com/questions/19718/will-pulling-pin-5-low-will-make-the-pi-boot-up-again Thanks to the above, it seems pulling pin 5 low after sudo halt will make it boot. After power interruption, pulling pin 6 makes it boot ... however I thought it boots when you apply power, so not sure what they mean. mark You are correct that it boots when power is applied, but after you have halted the system you would have to unplug and replug the power to switch it back on, which is messy. With the above solution you can just toggle power with the button as much as you like without touching the power cables or supply. It's good for when you want to make something where the Pi is hidden (in my case, an arcade machine).

uscdadnyc · Answer

Since the RaspPi is typically Powered by a small 5Vdc Power Brick, I just use a "Vampire Killer". A VK is just a short two wire AC Cord w/ an In-Line Cord Switch. At one end is a two-prong AC plug. other end is a two-prong AC Receptacle. Simple. I use these these wherever I have Pwr Brick that needs to powered ON/OFF. Saves Energy to Boot. Of course Purists may say I may introduce Transients by this approach, but that is speculative b/c IDK (I Don't Know) the RaspPi on-board Power Circuitry. I believe that that the actual RaspPi chips use 3.3Vdc. So like Hillary said in the US Congressional Hearings (on Benghazi, Libya) "... what does it Matter?" USCDADNYC (NY NY, USA)

paulnewton · Answer

Hi Graham,

I tried the method described in howchoo on my Raspberry Pi 3 with Raspbian.

This has just a single push button with no other components.

The button simply shorts ground (e.g. pin 6) to pin 5 gpio.

If the Pi is in its low power shutdown state after being previously shutdown, taking pin 5 low does wake it up.

Then after booting, a Python program listens for an interrupt on the same pin, and triggers a shutdown.

I found it works really well.

In my case, I am already using the ground pin 6 for my display, so I used ground pin 9.

The black wire is ground, the blue wire is the GPIO:

HowChoo also has an article for adding a power LED to signal when it is safe to remove power.

I fitted the LED next to the power button (its not shown in the picture above).

I found this useful, but a little misleading as the LED shuts off about 5 seconds before the SD card "ACT" LED stops flashing.

Regards - Paul