Cellphone microscope: A microscope that fits to your pocket

We always get fascinated with the beautiful structural life  of the micro-world because the Gods creation looks more beautiful in the sub-micron dimensions. A usual bamboo leaf looks more beautiful with its microscopic structural pattern. Moreover, the sub-microscopic investigation plays a vital role in human health.

Wikimedia commons: By Graeme Bartlett - Own work, CC BY-SA 3.0

But most of us are unable to visualize this fascinating unknown world due to requirement of microscopic imaging devices such as a light microscope. Due to its high cost it can't be affordable by individual even a laboratory with low resource settings. 

Wikimedia commons- Center for Biofilm Research, Montana State University, CC BY-SA 4.0

App Inventor Tutorials 1: How to use backpack to copy block codes from project to project

This tutorial shows how you can copy your block codes to the backpack in the app inventor interface and use these codes in an another project or screen.