The active alarm clock is composed to two separate devices that communicate with each other via bluetooth . The first device, the alarm clock module, is the primary interface users interact with. The alarm clock module contains an Arduino Uno, an LCD screen (that displays the current time), a buzzer, and a button interface soldered onto a breadboard, and a bluetooth module. The LCD screen is connected to a backpack that reduces the number of pins needed to connected the screen to an arduino. We connected the backpack directly to the arduino power and input/output pins. We also connected the bluetooth module (slave) directed to the arduino. The buzzer its own separate circuit composed of the buzzer itself and a 1-kΩ resistor. In order to make the buttons accessible to the user, we soldered a button interface and placed it on top of our case. The first button is used to set a time (and snooze, the second button is used to change the alarm time, and the third button is used to set the current time. Each button is connected to both a 1-kΩ resistor and a digital input to the arduino. The second device, the pressure module, contains the pressure pad and a bluetooth module used to communicate with the other arduino. The pressure pad is connected to a 1-kΩ resistor and an Arduino pin, while the bluetooth module (master) is connected directly to the arduino.
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