Vm202n dont work with usb supply


#1

Hi ! My vm202n works perfectly with a battery supply but not with a usb power supply (phone charger 5v dc, 1 A). How can I solve this problem ?
Thanks.
RM.


#2

What are the symptoms when you connect it to the power supply?
Have you checked the output of the power supply?
How are you connecting it to the VM202N?


#3

The output is ok, I checked it with a voltmeter. (5,2 volts). I plugged the red wire of the charger on the + pin and the black one on the ground pin of the module. The usb key with mp3 file is blinking (not exactly the same way it does when I successfully plug the module on batteries) but there is no sound (i plugged a mm210 amp with a different power supply on the mp3 module). The system works fine with 6AA batteries - with a higher voltage, so. Same problem when I plug an external usb phone battery.


#4

When you are attaching the 5volts you’re not using the resistor are you?
I don’t think it needs one for just 5volts


#5

No I dont use the resistor. Any idea ?


#6

Are you feeding the straight into the unit with the connector (green arrow) not the red arrow.

3227