Here’s a little board I knocked up in EAGLE, that I created to allow me to easily spin up BLDC motors that are often found in hard disk drives. I fabbed the boards with OSHPark, and finally finished soldering them up this week. A quick test indicates success!

 

Spinning away nicely.

Spinning away nicely.

The board is based on a DRV11873 from TI. It’s a nice little chip, and takes a lot of the work out of just getting the motor to spin. If you can’t afford the processor resources to drive the motor, you can offload that function to this IC, and control speed simply with a single PWM channel.