TF card MP3 decoder board without TF card, support to play MP3
music files, is currently testing 16G TF card support, and a larger
volume TF card is not tested yet
Powered by p3.7 lithium battery or 5V USB
3 Group white box top right corner of the board into three groups
touch of a button, the middle of a group to play pause button,
press the up and down two sets down song key, press the volume up
and down 2 Leader + - adjusted.
There customer needs its own modified U disk player, please ask for
information to the store manager, ability is not strong Oh does not
recommend changes to prevent it burning board, change U disk player
USB 5V power supply is recommended, because some old U disk is 5V
power supply, 3.7V lithium battery voltage is not supported, so the
battery, leading to U disk can not be played, as long as the new U
disk support 3.7V power supply is normal play.
With 2W mono amplifier, power amplifier maximum output 3W 5V supply
(recommendation 4 ohm 3W speaker with a small card small speaker on
the sound quality is good, sounds great, if that was not enough
volume, please directly for 4 Euro 5 watts speaker, loud to scare
you, absolutely surprised, hey In other 4 Euro 5 watt speakers, the
amplifier chip cooling attention Oh, plus the best heat sink)
There are customers to reflect amplifier when playing music, there
will be the phenomenon of heat, or amplifier tube amplifier chip
fever is normal, then they do not open to the large volume of the
amplifier, the speaker output short circuit (resistance 0 ohms) is
not going to burn amplifier chip can be assured.
There customer need to go back to the board to do the
pre-amplifier, power amplifier does not need this board, then go
back to their own amplifier, you can press the following
modifications, the board amplifier chip (8-pin chip) removed, and
then from the Master 4 feet and 6 feet (two feet left and right
channel output controller chips), each series with a 104 (or 224)
of the capacitor to the input of the amplifier can be (capacitive
isolators to prevent the same power supply When burned in the fire,
or late-stage master chip amplifier tube), and the remaining one
wire from the negative pole to the amplifier input common
There customer need to go back to the board modification listen to
music with headphones, the board of the amplifier chip (8-pin chip)
removed, and then the first 4 feet from the master and 6 feet
(about two feet of the master chip channel output), each series
with a 104 (or 224) of the capacitor to headphone left and right
channels, leaving a line connected to the headset from the negative
common terminal
Automatic power play
Loop with memory function, after the next power continues from the
last played tracks from the new play
Play. With LED indicator shows
PCB board size 34.23MM (about the distance) * 22.33MM (distance
from top to bottom) * 1MM (thickness)
Appearance maximum size 37.09MM (about the maximum distance) *
22.33MM (maximum distance from top to bottom) * 2.97MM (maximum
thickness)
3.7V 600MA lithium battery (043,545), if fully charged, can
be used to open the largest volume of about 3.5 hours when it
is powered on
