Raspberry Pi with GPIO Expender MCP23017 -

Raspberry Pi with GPIO Expender MCP23017

In this article we will learn how to make Raspberry Pi with GPIO Expender MCP23017.

In the last post we will learn how to make Raspberry Pi with Tri Color LED. You can visit our website,
I hope you appreciate my work, let’s discuss about today’s project.

Components:

Raspberry Pi (Pi 3)
IC (MCP23017)
Resistors (10k, 1k,)
Push Button
LED
Jumper wires

Construction…

Connect pin 12 of MCP23017 with GPIO 3 pin of Raspberry Pi
Connect pin 13 of MCP23017 with GPIO 2 pin of Raspberry Pi
Connect pin 18 of MCP23017 with one side of resistor
Connect 2^nd side of Resistor with GND
Connect A2 pin of MCP23017 with one side of Resistor
Connect 2^nd side of Resistor with GND
Connect A1 pin of MCP23017 with one side of Resistor 10k
Connect 2^nd side of Resistor with GND
Connect A0 pin of MCP23017 with one side of Resistor 10k
Connect 2^nd side of Resistor 10k with GND
Connect PIN0 of MCP23017 with +ve side of LED
Connect –ve side of LED with one side of Resistor 1k
Connect 2^nd side of Resistor 1k with one side of 2^nd Resistor 1k and then connect them with GND
Connect 2^nd side of Resistor 1k with PIN1 of MCP23017 through one side of Push button
Connect 2^nd side of Push button with +ve

Working…

The Raspberry Pi is a versatile single-board computer that can be extended with various peripherals and components to perform a wide range of tasks. The MCP23017 is an I/O expander that allows you to increase the number of digital I/O pins available to the Raspberry Pi. It communicates with the Raspberry Pi over the I2C (Inter-Integrated Circuit) bus.

Applications…

Expanding GPIO Pins
Home Automation
Keypad/Keyboard Interface
Digital Sensors
LED Matrix Control

Advantages…

Increased GPIO Pins
I2C Interface
Low-Cost Solution
Programming Support
Compatibility