Mini ATX PSU

Hello! I have  taken the proof of concept for the Compute Module 4 board to production.  You can now find the kits on Tindie.  Thank you all for your support!

Hi,

I have been busy over the last couple of years but neglected to keep everyone up to date.  The bane of a creative.

Above is my latest proof of concept, powering a compute module 4 from a desktop PSU using an updated version of my Mini ATX PSU card.

The board above is one of my prototypes for a redesign of the Mini ATX PSU.  The original goal of the redesign was to move to surface mount so that there would be minimal soldering on the part of the user.  In the process, I added a lot more features, all programmable through I2C.  Additional, as a lark I decided to see if I could easily power the Compute Module 4 through it's 12 volt PSU port.  And I can!  This allows the Compute Module I/O board to fully power the PCie connector while having soft shutdown capability.  The final product will also have watchdog timer support.

I'm pretty excited.  My final design is being built as I write this and I should have boards in about 15 days!

I'll post more when I get them in.  In the meantime, if you're interested in this, please contact me at tomtibbetts@gmail.com and I'll put you on the list.

Cheers!

One of my customers made an excellent suggestion.  He suggested that I look into whether this board will power down the desktop supply from a linux command.  What a great suggestion!

It turns out that it was easy to implement.  Now, if you do 'poweroff' command from the linux shell or select shutdown from the UI, the Mini ATX PSU will power down the desktop power after twenty seconds.  Why twenty seconds?  Because, Mini ATX PSU monitors the 'boot ok' signal coming from the Pi and if you reboot the Pi then it will just leave the power supply on.

This is really cool because now I can offer an Pi expansion board that will allow you to make your Pi into a desktop computer.

The Mini ATX PSU is for sale on Tindie.com.  Just look for the latest version, Rev. 1.1.1: 

https://www.tindie.com/products/tomtibbetts/piryte-mini-atx-psu-for-raspberry-pi/

I was recently asked to add a feature to the Mini ATX PSU so that it will remember its power state in case of power interruption.  What this means is that, if the Mini ATX PSU is powering the Raspberry Pi at the time of power interruption, then it will automatically reboot the Pi once power is restored.  Also, if the Pi was off or booting down at the time the power goes off, then it will stay off when the power comes back on.

Since I'm not sure everyone would like this feature, I've made it a programmable option.  For more details, please go to my Tindie store: https://www.tindie.com/products/tomtibbetts/piryte-mini-atx-psu-for-raspberry-pi/

Cheers,

Tom Tibbetts