Intro: Add Music to Your Room/ Enter Your Room With Music
I) old mp3 with inbuilt speaker or ever cheap mp3 player will do.
II)Insulated copper wires.
V)touch switch found in CD roms.
VI)speaker motor metal strips
Step 1: Connection
the wires from the switch should be connected to the battery and motor.
the axle or the rod of the motor should be soldered with a strip of metal with a wire.
other side of the motor there should be a another strip of metal.
once the switch of the door is turn on the motor spins turning on the mp3 power wire the motor acts as a relay switch.
put songs on your memory card and insert it in the player .
now fit the switch downwards not touching the ground just few mm up .
now fix a piece of matchstick or whatever you want on the floor
so that when the door is opened the switch gets pressed.
Step 3: Check How It Works