Today i'll present a my old project, made between january and february of 2015. It's a simple counter, based on Atmega328p and IR sensor Sharp 2Y0A21.
Working with small automatic machines, during the stages of testing, I needed to count the pieces coming out. So I made this simple device. Powered with 9V battery and equipped with 8x2 lcd display, it's perfect for my needs, it's portable and reliable.
All data necessary to carry are in the attached.
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.