HATs in the wild. And a unicorn.

If you’re a regular reader, you’ll recall that a month or so ago, we announced a new way of making add-on hardware for the Raspberry Pi: namely, the Raspberry Pi HAT (Hardware Attached on Top). You can read James, our Director of Hardware, explaining what they’re all about in the original blog post: in short, the HAT is a solder-less way of attaching hardware which can be auto-detected by the Pi, so GPIOs and headers are automagically configured by the Pi, without you having to do anything.

Gordon Pighat Hollingworth

The pink confection on top of Gordon is a hat, not a HAT.

(A tangentially related question: how do you pronounce EEPROM? Fights are breaking out at Pi Towers: a small majority of us rhyme the first syllable with “meep”, while the rest of us rhyme with “meh”. This is like the scone/scone thing all over again. Angry opinions in the comments, please.)

HATs are starting to appear in the wild. Adafruit are sending PCBs out for prototyping. HiFiBerry have HATs you can buy now: the Digi+, which enables you to connect an external digital-to-analogue converter; and the DAC+, a high-res all-in-one DAC. And the whimsical bearded pixies at Pimoroni have come up with my favourite so far (it’s my favourite because SPARKLES): the Unicorn HAT. I saw it in the flesh on Saturday at the Cambridge Raspberry Jam. It’s a thing of beauty. Here’s Paul, introducing the Unicorn HAT.

Are you making a HAT? Let us know in the comments: I’ll add links to this post if I’ve missed yours out here.