The Automatic Keg Tap

Not Good

Our Design

The Pump: Reciprocating Arm Motor

The difficulties of recreating a hand

1st Hand Prototype

Serious Issues

2nd Hand Prototype

3rd Hand Prototype

Adding Circuitry 1: Driving the Motor

Max Output Voltage: 5V Desired Input Voltage: 12V

Solution:Transistor Switch

5V

12V

Pressure Sensor (14.5 psi)

Adding Circuitry 2: Turning Pump on and Off

Problem 1:Sensor decided to stop working

Problem 2:Found new one, but…

Solution (Unfortunately):Timer and Flip Switch

Circuitry

The Bad

• Does not sense pressure• Not very portable• Difficult to attach• A bit shaky• Some noise• Loose nuts and bolts

The Good:

• Automatic– Minimal Effort (flip a switch)

• Can attach to any keg tap– No cutting or invasive maneuvers required

• Way quieter• Cheaper• Good flow