This is a 3x4 keypad that displays letters on the lcd screen based on which key has been pressed. Built using an atmega328p, a 3x4 keypad, a resistor and LED light. The code runs on C.
Basic components required are:
- Microcontroller (Atmega 328p-pu)
- Power source
- Wires (male to female and male to male wires)
- A programmer (atml studio)
- Board (copper board or bread board)
- Wires
Set up the circuit as shown in the figure below
A video of the code running
To upload the code to the chip,
run this code on atml studio and build it by pressing keyboad shortcut f7
The following code compiles the code to a .hex file where you made a project files
and then open avr dudes and load the hex file and upload to atmega328p