This module draws half an amp at 2v (more at 3.3v!) with no speakers connected and not running any audio and gets hot! is that normal?

No, I didn't encounter that. Do you have two speakers connected to the module? I.e., from one of the SPK pins to a speaker and to ground, and another separate speaker from the other SPK pin and to ground? DON'T do that. Only connect one speaker, from SPK to SPK, unless you have an external amp. Why are you powering this at 2V? That's not normal. At 3.3 V, with no audio playing and no speaker connected, my module is only very slightly warm. You may have a connection error.

Can it stop after each song and wait for a trigger to play the next song?

That's the way I used it. Played one piece, waited for a keypress or time-out (on Arduino), and triggered the next song.

Can I hook up an 8 ohm speaker directly to this chip?

Yes but only one, between the two SPK pins. Do not do what some videos show, i.e., one speaker from each SPK output to ground. It'll work - right up until you fry the device.

Does the microSD card need to stay in the slot to play sound or is it straightforward to store on the on-board flash?

The sd card has to remain in the unit. Mostly all of the boards you can easily interface with this module won’t have any decent sized on board flash to hold a music file.

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UMLIFE 3PCS Mini MP3 Player Audio Module MP3 Voice Decode Board TF Card U Disk IO/Serial Port/AD Board DFPlayer Audio Voice Music Module for Arduino

Product ID: 748510860

Details

Brand
UMLIFE
Compatible devices
Desktop
Fan count
3
Graphics card description
Dedicated
Graphics card interface
Integrated
Graphics processor manufacturer
via

🎵Supports MP3, WAV, WMA formats

💾TF card with FAT16/FAT32 support

🔊24-bit DAC, 90dB dynamic range

Description

🎧 Elevate your DIY audio game with pro-grade sound in a mini module!

VERSATILE CONTROL MODES - Choose from I/O, serial, or AD button control for flexible integration
COMPACT EFFICIENT DESIGN - Lightweight 15g module with minimal heat generation, perfect for embedded projects
HIGH FIDELITY SOUND OUTPUT - 24-bit DAC with 90dB dynamic range and 85dB SNR for crystal-clear audio
PLUG PLAY AUDIO DECODING - Seamlessly plays MP3, WAV, and WMA files without extra processing
ROBUST STORAGE COMPATIBILITY - Supports TF cards formatted in FAT16 and FAT32 for hassle-free file management

The UMLIFE 3PCS Mini MP3 Player Audio Module is a compact, versatile audio decoding board supporting MP3, WAV, and WMA formats. It features a 24-bit DAC output with a dynamic range of 90dB and supports TF cards formatted in FAT16 and FAT32. Designed for easy integration with Arduino and other microcontrollers, it offers multiple control modes including I/O, serial, and AD button control. Lightweight and efficient, this module delivers high-quality sound with minimal heat, making it ideal for professional-grade DIY audio projects.

Specifications

ASIN	B07Y2YKYRS
Antenna Location	Gaming, Office, Professional
Brand Name	UMLIFE
Compatible Devices	Desktop
Customer Reviews	3.7 3.7 out of 5 stars (155)
Graphics Card Interface	Integrated
Graphics Description	Dedicated
Manufacturer	UMLIFE
Manufacturer Part Number	UMLIFE-01
Model Name	DFPlayer
Model Number	UMLIFE-01
Number of Fans	3
UPC	701715427839
Video Output Interface	USB
Video Processor	via

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