The Simple Timer is an example of a project that makes use of simple tools such as an Arduino, speaker, and a seven segment display. The timer can be used in anyway you would with any other timer and with the use of batteries you are able to bring the timer wherever you might need it. This Simple Timer Makers use of 3 buttons indicating start, minutes up and minutes down. As well as a switch to power on the system, and potentiometer to adjust the brightness of the Seven segment display. An Arduino Uno is used to set and start the timer, as well as turn on off and adjust the brightness. A TM1637 Seven-Segment display is used to display the time the user is setting as well as the minutes and seconds that are left after the user presses the start button. Two 9V batteries are connected in parallel in order to power the entire system. When the timer hits 0, the Arduino send a signal to our speaker and system which will then output a 440Hz sound. To ensure the speaker will be heard we used an amplifier circuit in order to deliver a loud and clear sound. Two 9V batteries are connected in parallel in order to power the entire system. Because of this, you are able to bring the Simple Timer wherever you go and it will last up to 1hr before needing the batteries to be replaced.