Our groups intentions when designing this custom timer was to create a product that was easy to use, visible from a reasonable distance away, and for it to accurately keep track of the time that has passed. To interface with our custom timer there are several physical inputs that a user could manipulate. One switch sets the timing unit into timer or set mode. In set mode there are two buttons to set a time between 1 second and 60 minutes for the timer to count down from. There is also a potentiometer the help set the 7-segment display to 3 distinct brightness levels. Two more switches, one for power on and off and a mute switch for the alarm are also found on the device. We also have power LEDs to determine remaining battery life. The main brain of our project is an Arduino nano. The Arduino on board clock is used to count down and store the set time from the user. We also have a custom PCB circuit that contains a 555 timer tuned to a specific buzzer frequency and an amp to make the output square wave audiable when played through a speaker. This custom timer is the culmination of what we have learned so far as juniors. As a team we came together and learned how to work and code on Arduinos, design and send PCB off for manufacuting, and how to work in a team enviroment. Over all our biggest struggles came from learning about arduino and intially how to order PCB. If we had more time we would try to combine everything onto one PCB and use the Ardino for more of the projects functions.