The backlight is automatically lit and is connected to pins 1 and 2 in common with the LCD. I ended up scraping the J3 connection gently with a stanley knife and managed to cut the common connection.

Keyless Door Pin Lock System This Sketch allows the End user to create a PIN Lock System the access is granted when the correct 4 character PIN is entered, when the correct password is typed the text ...

ultrasonic sensor value in lcd display with arduino ultrasonic sensor value in LCD display with Arduino code: // C++ code // include the library code: #include // initialize the library with the ...