Introducing Cointer, a coin counter (yes)

This project is a realization of a coin sorter. It uses lasers and photoresistors : the coin cuts the beam and increments the 7 segments displays while pressing a button decrements these displays.

You will find here the main code of this project but also simulation and 2D plans.

• Library requirement : My Simple I/O Library (docs)

• Component list for 3 columns :

  Component	Count
  7 segment display (common anode)	6
  Button	3
  BCD (4511)	3
  Resistor ~470 ohms	21 (7*3)
  Arduino MEGA (or Arduino with enough pins)	1
  Photosensor	3
  Resistor ~1kohm	3
  Laser	3

Resources:

• Code explanation
• Plans for building