arduino_clock

Arduino clock build from Arduino Pro Mini, LCD, RT DS3231 and Matrix Keyboard

Pinout

LiquidCrystalDisplay (LCD)

• VSS - GND
• VDD - VCC
• VO - Potentiometer PIN 2
• RS - D7
• RW - GND
• E - D8
• D0 - --
• D1 - --
• D2 - --
• D3 - --
• D4 - D9
• D5 - D10
• D6 - D11
• D7 - D12
• A - Resistor 220 Ohm -> VCC
• K - GND

Matrix Keyboard (MK)

• W1 - D5
• W2 - D4
• W3 - D6
• W4 - D2
• W5 - A0
• W6 - A1
• W7 - A2
• W8 - A3

RT DS3231 (RTC)

• GND - GND
• VCC - VCC
• SDA - A4
• SCL - A5
• SQW - --
• 32K - --

Potentiometer (POT)

• Pin 1 - VCC
• Pin 2 - LCD V0 PIN 3
• Pin 3 - GND

Buzzer

• Pin 1 - GND
• Pin 2 - D3

Behavior

• Press A to chnage between Edit mode and Normal (display) mode
• Press B to chnage between alarm and Edit Alarm mode
• Press * to move cursor in edit mode to left
• Press # to move cursor in edit mode to right
• Use numeric pad in edit mode to chnage current cursor value