Bring back MiniDV with this Raspberry Pi FireWire HAT (opens in new tab)

In my last post, I showed you to use FireWire on a Raspberry Pi with a PCI Express IEEE 1394 adapter. Now I'll show you how I'm using a new FireWire HAT and a PiSugar3 Plus battery to make a portable MRU, or 'Memory Recording Unit', to replace tape in older FireWire/i.Link/DV cameras. The alternative is an old used MRU like Sony's HVR-MRC1, which runs around $300 on eBay1.