Shipping to the US went about as well as can be expected. No complaints there.
My unit does not work with any of the USB-C power supplies I have; a short time after booting, the yellow LED starts blinking, indicating that the device has detected a voltage sag. According to the hackaday blog posts, this is basically due to the fact that you need an ultra-stiff power supply for this thing to work correctly. I will try the official Raspberry Pi power supply as recommended in the blog documentation, but my hopes are not high.
The form factor is good. I did have to put a spacer on the rpi header to give the UPS some vertical clearance; this is due to the fact that I already had some aluminum heatsinks glued onto the pi itself, and did not want to remove them. I think if I didn't have the heatsinks it would mate perfectly right out of the box.
TL;DR this is not a plug-and-play solution; you probably need to order a very specific power supply to ensure that this works.
Response from DIY stuff | May 23, 2021
Dear Patric, many sections of the documentation indicate that, according to measurements, successful use is only possible with the official pi power supply. There might be others on the market that work but from your description of the failure it is definitely a power supply issue. I'd be interested which brands of PSU you already tested and which voltage/power rating they have. Don't forget also the cable has an impact in case you were using a PSU with USB-A connector and an adapter cable. Regards, Dirk
I've ordered this board to power a Raspberry Pi in an amplifier I'm building. When the amplifier is not in use, it is powered down completely to save some energy. However it is very cumbersome to go through a complete shutdown procedure manually before powering down. Often the Raspberry Pi gets unplugged because it is too much effort to shut it down over ssh first.
This board is the perfect solution for this problem. It allows to add a power button easily to quickly shutdown the Pi, but most importantly will also shut down the Raspberry Pi when unplugging the power! This really made working with the amplifier a breeze!
The documentation on Hackaday is good and gets you started quite easily. I modified the pins to which the power down and acknowledgement signals are connected. With the documentation in the software it is easy to adjust it to use other pins. You can basically connect it to any pin on the Pi using some wires.
I really recommend using the board on a Raspberry Pi which you shut down frequently as it makes it much easier!
It works great as described. Finally I can stop worrying about power outages corrupting my Raspberry Pi SD card! So happy with it that I boight second one. Thanks for having engineered this great piece of hardware!
I bought the smart UPS to integrate it into a Squeezebox Touch rebuild that is running on a Raspberry Pi 4. The UPS works flawlessly and shuts down the PicorePlayer and more important the additional media server safely as soon as the power is unplugged and thus avoids any corruption of the server cache. I use an original 3A Raspberry power supply and have seen no problems. The Supercaps give around 20 sec shutdown delay. Both HW button triggered and SW triggered shutdown functions work out of the box by enabling the available shutdown and poweroff overlays on the required GPIO pins of the Picore player config. Communication of the seller was supportive and shipping was fast. Thank you for developing this board, I can highly recommend it !