“Arduino Self-Timer” project presented here is a low-component count 60 seconds countdown timer. It can be powered from a 9V compact battery or suitable Arduino AC mains adaptor. Working of the circuit is simple! When you Press the RESET Button on the Arduino board, the timer will countdown from 60 seconds, as programmed. Once the timer countdown reaches 0 seconds, the PIEZO-BUZZER (BZ1) will bang on and the LCD display will blink “TIMER ALERT!”. An optional RELAY driver output is available at pin 4 of the Arduino board. If you wish to add an electromagnetic relay to switch off/switch on any external electric load, just use this output to drive the electro-magnetic relay with the help of a suitable transistor-based relay driver circuit. Note that the timer program is resetted every time you press the RESET Button and the timer countdown begins again.