Posted in Arduino Hacks, home hacks Tagged arduino, arduino keypad lock, automated door lock, keypad ← Deconstructing Apollo Flight Hardware A Nightmare On CNC Street → ...

[Usmar A. Padow] put together an Arduino Uno, SD card, four line character LCD, and PS/2 keyboard. but he’s also included alternative options to go without an LCD screen by using a computer ...

The card, which features a keypad and a liquid-crystal display, lets the cardholder generate a one-time password (OTP) to be used for transactions that require a higher level of authentication.