Hard Drive After Life

Step 3 The Midi Interface

I built my own Midi interface to play the hard drives.  The circuit uses a PIC 16F877 to receive midi from a midi card inside a computer and turn on solid state switch modules. Both +5 and +12 volt power is applied  to the hard drives. I used the modules because I already had some in a nice rack from a previous project.  Transistors or relays could be used to do the same thing.  The main idea is to turn on and off the hard drives with midi. I wired the PIC 16F877 and the other components on a Radio Shack pref board.