“So useful. Essential in fact, if you want to connect an add-on to the Raspberry Pi 400.
There are all sorts of boards and cables to assist with doing this, but the simple, cheap ribbon cable with connectors is ideal to get started with.”
“Getting HATs connected to the RPi 400 is pretty annoying, I've got a right angled pin adapter as well but then your hat sits hovering above the keyboard in your way. This makes attaching HATs nice and easy but I had to sit my HAT on a little box to have it sit flat. I also struggled getting the HAT back out, it's a tight fit. I actually bent the pins slightly but managed to get them back. A guitar pick does a good job of getting your HATs out again!”