An Arduino project implementing a security alarm system featuring PIN code access via a 4x4 keypad, status updates on a 16x2 ... for the LED 1x 10k Ohm potentiometer for LCD contrast (if not using an ...

User enters the password using the keypad. LCD displays whether access is granted or denied. You can modify the code to control a door motor/lock mechanism.

Rather than be left on the wrong side of the divide [Stefan S] has come up with his own USB-C version of of an Arduino Pro Micro to avoid having to always find a different cable. Home made ...

Everything is controlled with an Arduino Nano clone. [Stephen] has an active Kickstarter campaign going for Pisces, and one of the rewards is the code and STL files. On the IO page for Pisces ...

Wire your LCD display to the Arduino using the I2C connection. Connect VCC to the 5V power rail, GND to the ground rail, SDA to Pin A4, and SCL to Pin A5. The LCD should now share the same I2C bus ...