DaedaBuzz
Battery backup buzzer for aircraft recovery
A custom battery-backup buzzer designed to help locate the aircraft after a crash or emergency landing. DaedaBuzz charges from the aircraft's 5 V supply and sleeps until power is lost — then it wakes up and beeps loudly to guide the recovery team.
- MCU
- ESP32
- Battery
- 1S 500 mAh
- Boost
- 25 V
- Interface
- WiFi
DaedaBuzz is built around an ESP32 microcontroller that drives a passive buzzer through a MOSFET. A 25 V step-up converter supplies the buzzer, powered by a small 1S 500 mAh LiPo battery. While connected to the aircraft's 5 V rail the ESP32 stays in deep sleep and the battery charges. The moment external power is lost, the ESP32 wakes and begins a loud, repeating beep pattern.
A disarm jumper on the PCB lets the team silence the buzzer on the ground before handling the board. Because the ESP32 has built-in WiFi, DaedaBuzz also exposes a simple access point — anyone within range can connect to the network and trigger or silence the buzzer remotely, adding a second layer of control.
The compact PCB (30.9 × 41.7 mm) is designed to tuck into any available space on the airframe. Status LEDs indicate charging state, and the board features a USB-C port for programming and bench charging.