Today, you’re going to learn how to make an encrypted login system. Encrypted login system is used in different areas. Almost every card has a UID, and if you know this UID, with a microcontroller, you can make whatever you want to make.
How does RFID Technology Works?
A basic RFID system comprises two parts: the tag, and the reader.
The RFID tag has an embedded transmitter and receiver. The actual RFID component contained in a tag has two parts: an integrated circuit for storing and processing information, and an antenna to receive and transmit a signal. The RFID tag has non-volatile memory storage and can be included either fixed or programmable logic for processing transmission and sensor data.
The RFID reader features a two-way radio transmitted-receiver (transciever), sometimes referred to as an interrogator. The transceiver transmits an encoded radio signal to interogate the tag. The radio signal essentially wakes or activates the tag. In turn, the tag transponder converts the radio signal into usable power and responds to the reader.
It’s a basic tag that we use in almost every areas nowadays.
Circuit Diagram of Encrypted Login System
In this Project, as you see there is a 16×2 LCD display but I used 20×4 i’2c LCD display, so if you want to use a classical 16×2 screen, you have to change the code a bit.
But if you want to use i’2c 20×4 LCD display like me, you have to connect like this. But why we are using i’2c display? Because these displays that without i’2c, they require a lot pin and in some Project, we can not find enough empty pin to connect.
So here is the raw diagram of the Project.
- Any model of Arduino, in this project Arduino Uno was used
- RFID MFRC522 Module
- 20×4 LCD Display with I2C Communication Module
- Servo motor
Here is the code of the Project.