Hi,
You designed a PCB ... and it doesn't work.
But you don't show us your PCB, or did I miss it?
You are not the only one acting this way.
And I always wonder what's the reason for this behaviour. Top secret design?
Klaus
The OPA322 is an opamp, not a power amp. It cannot drive a speaker like a power amp can but it can drive the input of a power amp like an LM386. The recommended maximum power supply for an OPA322 is 5.5V.
But an LM386 by itself can have a gain of 200 and use a microphone at its input and a speaker at its output.
Good Luck.
How to explain....I'll go with transistors, just to make anything work first.
Hi,
How to explain....
Don't change the parts, change the PCB layout.
And the design will work.
Klaus
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