I know at 100% all we have at least 1 broken HDD or Video or Floppy . What we can do with them ????Throw awayMake a water compressor for water cooling Make an abrading disk Other versions Choose your version . If you dont want to throw it away , you need this PCB and circuit . I have made a PCB where you can place SMD or standard components , you can place LED , you can place Potentiometer to control the speed of your small motor. Its the most universal PCB that you can find . BOM as always is attached .