Simple Speaker
Heylo People, in this Instructable, I made a very simple, cheap speaker. For me, it's kinda useful. Check it out!
Preparing...
What you need is just a regular things, which are:
1 Cardboard from Wrapping Food Plastic
2 Glass Cups
Cutting...
Cut a rectangle hole at the middle of the cardboard, its for your smartphone as the input. Then make a hole in each cup, so the cardboard can be plugged in.
Finishing...
Plug all the materials. Then try to plug your smartphone. If its not so perfect, try to adjust the size of the holes and the cup directions. Done.