My latest project involves getting a BLDC motor from a hard drive spinning at an appreciable rate. My original approach was to leave all of the hard drive tidbits connected and just apply power to the hard drive's power pins, however after a minute or two the drive spins down in what I can only imagine to be the HD controller panicking because its read/write arm has been disconnected.
So the next step was to figure out how to drive it myself. After a few hours googling reading whitepapers from Atmel/Microchip/whoever on driving BLDC motors, I came to the conclusion that building my own driver was outside my technical expertise.
After a bit more googling, I discovered a handful of purpose-made ICs for driving BLDC motors like this one. Now the problem was actually sourcing one of these driver chips. It seems like every supplier is either some sketch chinese site or requires all orders to be in multiples of 1000.
tldr: how the hell do people actually drive these motors?