MXA144

The MP3 playback circuit is designed for use with various devices to prevent
accidents. For example, it can be connected to the reverse lights of trucks or
forklifts to alert people nearby. It can also be connected to sensors to trigger
warning sounds, such as a PIR sensor to play a welcome sound, or a coin sensor to use it in a donation box.

• Power supply: 12-24 volts, with a maximum current consumption of about 1000 mA.
• The sensor connection can accept both positive (H) and negative (L) signals.
• The circuit will play continuously as long as the sensor signal is active.
• MP3 files can be stored for up to about 4 minutes at a sampling rate of 128 kHz (4096 bytes).