In this post I’ll show you how to build a RFID reader for security access based on Arduino MEGA board. The code I’ve used is a modified version of a design that was published at Arduino project hub. I added 2×16 LCD display to show card ID and MOSFET driver for controlling an electric strike … Read more
In this post I’m going to show you how to use a Serial I2C Interface Module to control 2×16 LCD display with Arduino. For similar design using PIC16F876 click this link. Instead of using 8 or 4 bit parallel connection from Arduino board to LCD only 2 pins are required. One for sending the Data … Read more
This implementation of Arduino based PWM Fan Controller is simple circuit that allows controlling fan speed by varying the duty cycle of the output signal. For PIC16F684 version click here. I’ve tested with Deepcool 120mm fan and it works OK, however you’ll need to adjust the lowest PWM value according to a specific fan you … Read more
Here is another Arduino based design and this time I’ll show you how a 4-Digit Code Electronic Lock can be built with Arduino Mega or compatible boards. For similar design based on PIC16F877 click this link. The I/O I’ve used for this project are common for both Arduino Mega and Arduino UNO boards so this … Read more
Digital Alarm Clock based on Arduino MEGA board and 2×16 LCD display is the topic of this post. Similar design based on Raspberry Pi can be found at this link. For PIC16F877 version click here. This design should also work on Arduino UNO or any other compatible boards. However I did not test it. Arduino … Read more