I am having difficulty connecting my ISD1820 board to a LM386 amplifier circuit.
I have built the LM386 amplifier circuit with a gain of 200. I have tried connecting my mp3 player to this circuit, and it is working perfectly. To connect my mp3 player, I am using a 3.5 mm headphone jack. As most people on this forum will know, the headphone jack has three connections that can be made. One connection is for the left speaker, one is for the right speaker (for a stereo configuration), and one is ground. Since the LM386 circuit I have built is a mono amplifier (not stereo), when I connect my mp3 player to the LM386 circuit I connect only one of the inputs from the headphone jack (either the left or right), and the ground, to the LM386 circuit.
This is all fine and well, and as I said, it works perfectly. However, when I try to connect the ISD1820, nothing happens. Here is a link to the ISD1820 board I am using: http://www.elecfreaks.com/2215.html
. In the instructions, it is stated that this board can be connected to a LM386 circuit. I believe they are saying to connect one speaker output from the ISD1820 to the input for the LM386 circuit, while leaving the other speaker output from the ISD1820 empty. I have tried this, but it does not work. I have also tried the FT switch but this does not help (although I'm not entirely sure what FT does...).
My questions are:
1) Do you believe I am reading these instructions correctly; should I only connect one speaker output from the ISD1820 to the input of the LM386 while leaving the other output from the ISD1820 empty?
2) Has anyone ever successfully combined a ISD1820 board with a LM386 amplifier?
I really appreciate any help you can provide.