<p>Name: M3 voice playback module</p> <p>Model: -M3</p> <p>Power supply: DC 5V 0.5A (3.5-5.3V)</p> <p>Standby current: 28MA</p> <p>Working current: 80MA (specifically related to speakers and sound volume)Trigger ports: 9. Trigger : 9 are directly triggered, 31 are triggered by single-chip encoding</p> <p>Trigger level: low level ( 0.8V)</p> <p>Speaker parameters: 0-3 watts 4-8 ohms (volume adjustable)</p> <p>Support maximum memory: 32G</p> <p>Supported playback formats: MP3, WAV</p> <p>Difference: This module is basically the same as the M3T module in our store. The trigger levels of the two are different. This model is a low-level trigger.</p> <p>Special application tips:</p> <p>1. It is necessary to use this module to play a certain song when it is powered on. It is only necessary to ground the corresponding trigger port (GND) before powering on!</p> <p>Inspection and testing process:</p> <p>1. Prepare 5V power supply, memory card, speakers, and save the memory card into an MP3 file according to the naming described above.</p> <p>2. Insert the memory card, speaker, and 5V power supply according to the order (pay attention to the positive and negative poles, 5V is positive, and GND is negative).</p> <p>3. Use the connecting line to trigger the connection between GND and A1, the indicator light will be off, and song 1 will be played at the same time.</p> <p>4. The operation is completed. (If the indicator light flashes once and no music is played after triggering, check the file format of the memory card)</p> <p>DUE to Different Batches, The Apperance, Color and Printing of the Product May Be Different, which does not attract use.</p> <p>Colour:blue</p> <p>Material:PCB</p> <p>Package Contents:</p> <p>1 x Module</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>