The brains behind this digital photo frame is a Raspberry Pi 3 he received from a friend. To turn the whole on/off, he built a small circuit but it turned out it wasn’t strictly necessary since ...

Even the 3D printed frame is technically optional ... If you’re looking for an easy way to add a photo slideshow to a small device, say a conference badge, this is about as easy as it gets.

It doesn't look too much like a photo frame, but more like a tablet on its ... images are displayed brightly and crisply, as the small screen size results in a decent 170ppi density.