Passive Acoustic Phone Amplifier


  • Make one working cup and calibrate with flowing tap water
  • Minute cup: Create a cup that takes between 1 to 5 minutes (depending on the size) to fill
  • Hour cup: One cup that takes between 20-60 minutes (depending on a cup)
  • Day bucket: It takes between 3 and 10 hours to fill (depending on size)
  • Adjust the tap flow
  • Calibrate and mark cups with the clock as a reference


1. Take a picture of your project

2. Submit the picture, the video and write a few lines about what didn’t work and what you learned in the project on FB’s Zero2Maker page.


4.Include these hashtags: #zero2maker, #zerolab