On Thu, Sep 28, 2023 at 04:25 AM, Hans Summers wrote:
Hi Peter
?
IC7 and IC9 are the two?unidentified chip supplies on the VCC (+5V) rail. Apologies for the confusion, the PCB CAD library for these op-amps doesn't seem to label the IC at the power pins.?
Thanks for clarifying that, Hans. Yes, it makes sense to power those small signal audio amplifiers from the 5V rail - nicely regulated by a linear regulator instead of from the potentially (relatively)? noisy 12V line.
--
Peter Lee
G3SPL
