Learn how to create a simple yet effective speaker amplifier using just cardboard and a few basic materials. This DIY project is perfect for enhancing your phone's audio without breaking the bank.

Make a portable audio simple amplifier. Homemade amplifier for speakers ...

Want to make your own air knife to cut things with? Unfortunately that’s not what these devices are intended for, but [This Old Tony] will show you how to make your own, while explaining what they are ...