Carrier/interconnect PCB for Hypex DSA254 with Bela Gem inputs 6–9, SMPS1200A400 power/control connectors, four speaker outputs, test pads, and optional DNP input suppression.

Battery-Powered IoT MQTT Notifier with USB-C Power-Path Charging, Multi-Rail Power Architecture, and 3 s Long-Press PFET Power-Gate (MP5014 + LTC2955 + MCU SYS_EN Override) #power_control #long_press #load_switch #sys_en