A project study entitled Coin Operated PDF Printer using Raspberry Pi3
This project study is called Coin Operated PDF Printer. Its primary purpose is to print a PDF document by inserting a coin using a microcomputer instead of an expensive desktop computer. The Raspberry Pi (microcomputer) will serve as the heart of the full machine. A coin slot is incorporated to the Raspberry Pi (microcomputer) which can accept three (3) different coins (1 peso coin, 5 peso coin, and 10 peso coin). A printer is also connected to the microcomputer which prints the document/s. All of the user’s transaction is corresponded by a Graphical User Interface in a monitor and LCD display.
The new Raspberry Pi3 Model B is used. It is a small but powerful computer having ports for Composite video, Analog audio, Power, Internet, and SD Card. It has a built-in Bluetooth and Wi-Fi module and a General-purpose Input/output (GPIO) pins which can act also as a microcontroller.
A high level programming language which is Python3 is used based on a technique called Object-Oriented Programming which is very useful in developing user interface applications. Linux built-in terminal commands are embedded also to the main Python program.
Components Used:
Hardware
- Raspberry Pi 3 Microcomputer
- Inkjet printer
- Universal Coin Slot
- Jumper Wires
- Circuit Boards - Breadboard
- Mouse and Keyboard
- USB Hub
- LCD 16x02
- Monitor
Software
- Raspbian OS - a linux based OS for Raspberry Pi
- Python3
- Tkinter hard code GUI
- Linux shell script (terminal command)
Printing Process follows . . . . . . . . . .
