Hi guys, this is my first Instructable and I will show you how to build some efficient speakers with just a little of duct tape and copper wire. I hope you enjoy! (Forgive my bad english, I will try to be as clear as possible)
Step 1: Materials
For this instructable you will need:
- Insulated copper wire (as thin as possible, a little more than a human hair)
- A pair of earphones
- A powerful magnet
- THE DUCT TAAAAAAPE (I used some Masking tape but any kind of tape is fine. the important thing is to have a sticky surface on which to paste the coil)
Step 2: Tools
For this instructable you will just need:
Step 3: The surface
First you need to build the surface on which to assemble the speaker. Cut five strips of adhesive tape (about 10-11 cm long) and stick them close to each other (IMPORTANT: THE STICKY PART MUST BE FACING UP).
Then cut off the irregular sides
Step 4: The coil
To build the coil just follow the drawing. When you reach the last coil (the smallest), cuts a thin strip of tape and (always with the sticky side upwards) stick it as in the picture, allowing the end of the wire to pass over to the other coils. In the end leave 5-6 cm long terminal.
Step 5: The cable
To connect the speaker to the signal source you will need a stereo cable. You can buy one at http://www.radioshack.com or You can obtain it from a pair of headphones, as I did.
Step 6: Cardboard support
If you want you can build a small cardboard support, for aesthetic reasons