Protect the Brew. After a bad experience with collecting money for a Beer Olympics I came up with the idea for our project, a smart beverage dispenser. One that would limit access to the delicious golden ale inside. Despite my original intentions this project can also be implemented to prevent underage drinking and to keep track of how much people drink. So don’t tell me you had 6 beers when you only drank 4.
The key aspect to this project is the fingerprint scanner. It provides the security we wanted for the project at an affordable price. With two microcontrollers, a Homebrew Draft System, the fingerprint scanner and a solenoid valve the project began. The system is designed so the beverage will only dispense after your fingerprint is verified. We used an Arduino to communicate between the scanner and the A3BU which controlled the other functions. The system will identify who accessed the system and display it on the A3BU LCD. It will also activate one of the LED’s that indicate the status of the fingerprint, red if denied and green if approved. Assuming the approval signal is received by the A3BU it will send a signal that activates a solenoid motor through a transistor circuit. The System will then dispense the beverage for 20 seconds which at 15 psi will fill up a cup.