摘要：2x3 keypad with the soundof the buzzer is an electronic circuit that will be active ifthe use of a 9V battery as the source voltage and the circuituses a microcontroller as the brain of the workings of thiselectronic tool. This series consists of 7 pieces Led and 6buttons. Led where one serves as an indicator. The workingof this tool is if one of the keys 1 through 6 is pressed thenthe LED will glow and the Buzzer will sound.
