avatardelta| Quantity | Component name | |
| 1 | × | Raspberry Pi B+ |
| 1 | × | Witty Pi |
| 1 | × | Adafruit PowerBoost 1000 Charger |
| 1 | × | Transducer |
| 1 | × | Adafruit Stereo 3.7W Class D Audio Amplifier - MAX98306 |
Is the keg empty? Acoustic beer keg monitor
Using a Raspberry Pi to roughly detect when the fill level of a liquid in a closed steel container (Otherwise known as a beer keg).