Custom Startup / Welcome Sound: Trigger a specific audio file (engine roar, movie quote, or modern system-check chime) the exact moment the ignition transitions to RUN.
Intelligent Priority Sequencing: Prevents audio overlap. The module actively reads your vehicle's states and prioritizes alerts in the background (Startup > Headlamps > Key in Ignition > Seatbelt).
Factory Seatbelt Nag Timer: Mimics modern GM architectures. Triggers an initial 5-chime warning at key-on, followed by a 60-second silent interval before repeating, instantly canceling the moment the belt is buckled.
MicroSD Expandable: Swap sounds instantly. Supports MicroSD cards up to 32GB. Load your 44.1kHz / 128kbps MP3s and map them to physical triggers.
Built to survive harsh automotive electrical environments. No cheap clones, no thermal runaway.
Microcontroller: Atmel ATtiny84 handling precise millisecond-level timing and state-tracking.
Audio Processor: Genuine DFRobot YX5200 IC with built-in 8002A 3W amplifier. (Idles at a safe ~20mA to prevent parasitic battery drain).
Signal Isolation: All logic triggers (Ignition, Headlamps, Seatbelt, Key/Door) are decoupled via optocouplers to protect the MCU from 12V automotive voltage spikes and alternator noise.
Power Regulation: Onboard LM2940 low-dropout (LDO) regulator with a 470uF LC filtering stage to ensure clean DC power.
The module reads standard MP3 files from a FAT32 formatted MicroSD card. Files must be placed inside a root folder named mp3 and numbered sequentially:
Custom Startup / Welcome Sound: Trigger a specific audio file (engine roar, movie quote, or modern system-check chime) the exact moment the ignition transitions to RUN.
Intelligent Priority Sequencing: Prevents audio overlap. The module actively reads your vehicle's states and prioritizes alerts in the background (Startup > Headlamps > Key in Ignition > Seatbelt).
Factory Seatbelt Nag Timer: Mimics modern GM architectures. Triggers an initial 5-chime warning at key-on, followed by a 60-second silent interval before repeating, instantly canceling the moment the belt is buckled.
MicroSD Expandable: Swap sounds instantly. Supports MicroSD cards up to 32GB. Load your 44.1kHz / 128kbps MP3s and map them to physical triggers.
Built to survive harsh automotive electrical environments. No cheap clones, no thermal runaway.
Microcontroller: Atmel ATtiny84 handling precise millisecond-level timing and state-tracking.
Audio Processor: Genuine DFRobot YX5200 IC with built-in 8002A 3W amplifier. (Idles at a safe ~20mA to prevent parasitic battery drain).
Signal Isolation: All logic triggers (Ignition, Headlamps, Seatbelt, Key/Door) are decoupled via optocouplers to protect the MCU from 12V automotive voltage spikes and alternator noise.
Power Regulation: Onboard LM2940 low-dropout (LDO) regulator with a 470uF LC filtering stage to ensure clean DC power.
The module reads standard MP3 files from a FAT32 formatted MicroSD card. Files must be placed inside a root folder named mp3 and numbered sequentially:
