Solve noise for Amplifier board.

[Chauny]

Hello peaple,

I make a amplifier circuit with TDA2030, the amplifier works but when
i connect it to loudspeaker, turn on the power, i hear noise from
loudspeaker without input. I can not solve this problem although i
make layout with center ground.
Could anybody help me solve this problem?

Regards,
Chauny.

 

[martin griffith]

Hello peaple,

I make a amplifier circuit with TDA2030, the amplifier works but when
i connect it to loudspeaker, turn on the power, i hear noise from
loudspeaker without input. I can not solve this problem although i
make layout with center ground.
Could anybody help me solve this problem?

Regards,
Chauny.

describe the power supply please


martin

 

[Eeyore]

Hello peaple,

I make a amplifier circuit with TDA2030, the amplifier works but when
i connect it to loudspeaker, turn on the power, i hear noise from
loudspeaker without input.

What kind of noise ?

Graham

 

[mpm]

I  make a amplifier circuit with TDA2030, the amplifier works but when
i connect it to loudspeaker,    turn on the power, i hear noise from
loudspeaker without input.

I agree. Sounds like a power supply issue.
I would look there first.

Can you describe the noise it is making?
Static, high-whine, low-rumble, something else??
Also, how loud is the noise, and what sound(s) are you trying to
amplify?
Speech? Music? Simple tones?, a combintation?
And while you're at it, what kind of speaker?
-mpm

 

[D from BC]

Hello peaple,

I make a amplifier circuit with TDA2030, the amplifier works but when
i connect it to loudspeaker, turn on the power, i hear noise from
loudspeaker without input. I can not solve this problem although i
make layout with center ground.
Could anybody help me solve this problem?

Regards,
Chauny.

When you press your ear against the speaker, try not to move your ear
around..That will make a rubbing noise..
D from BC