how i check my voice chip

M

mic5

Member

• Mar 28, 2010

• #1

i using voice playback chip apr9600. i got the circuit from this ic manual and checked it. I cann't hear the beap sound and also cann't record the voice. how can i overcome this problem? please give suggestions...

 

audioguru

Well-Known Member

Most Helpful Member

• Mar 28, 2010

• #2

The datasheet for the APR9600 IC shows exactly how to connect it and how to use it. It even has a complete recorder/player circuit.

 

M

mic5

Member

• Apr 1, 2010

• #3

audioguru said:

The datasheet for the APR9600 IC shows exactly how to connect it and how to use it. It even has a complete recorder/player circuit.

Click to expand...

i accept your point. Even i tried this circuit many times, no beep sound in the speaker. The one thing i observed is some hmmmmmm sound occurs periodically... what may be my mistake and how can i detect it?

 

Boncuk

New Member

• Apr 1, 2010

• #4

Hi,

a 28 pin IC requires some connections and the parts being used do as well.

I suggest not to build it on a breadboard, but design a prototype PCB for it.

The PCB can't possibly have the many wiring errors you'll have using a breadboard.

For possible change of components use (machined) IC-sockets to connect to the desired nets.

Boncuk

 

audioguru

Well-Known Member

Most Helpful Member

• Apr 1, 2010

• #5

An intermittent hum is caused by a loose ground wire on a breadboard. Solder the wires permanently on a pcb instead.

 

M

mic5

Member

• Apr 8, 2010

• #6

thanks for your suggestions! i got output with some corrections in my connections. i think the sound volume is low. I need to amplify it to some level. may i use lm386 audio amplifier ? is it good for my circuit?

 

Hero999

Banned

• Apr 9, 2010

• #7

Yes, you can use the LM386, but it still might not be loud enough.

What's the supply voltage?

You could use the TDA7052 which is much louder.