This project implements a 4x4 matrix keypad scanner on an STM32 microcontroller using direct register access (bare-metal, no HAL or LL libraries). The keypad is scanned by configuring the rows as GPIO ...

This project demonstrates Li-Fi (Light Fidelity) communication between two Arduino boards using visible light for data transmission. Text data is transmitted using an LED and a 4x4 keypad on the ...

A standard telephone keypad, with four rows of three keys each. The top row consists of 1, 2, and 3, with keys continuing down in order until the last row, which is usually *, 0, and #. Such a keypad ...

Started Roblox Terminal Escape Room and don’t know how to find your way out? You need the answers to the tricky brainteasers contained within, and we’ve got every answer from Chapters 1 to 5. Since ...

Michal studies Automotive Journalism at Coventry University in the UK, and has been writing for CarBuzz since March 2025. He was nominated for student culture piece of the year recently and has been ...