@lee-g @davee @natalieadkins Hopefully, the OP will pick up. I will follow this post with a similar post for the Receiving side as it is highly flawed as well.
I am attaching the datasheet section showing the mic pins, Bill's relevant notes, and the OP's diagram. VDD has no power, and the decoupling capacitor is missing. We can also see the 3V3 pin is connected to Ground. As far as I can see, this circuit has no power and therefore can not work.
First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, 360, fairly knowledge in PC plus numerous MPU's & MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.
@lee-g @davee @natalieadkins Here, we see the Receiving side with no power anywhere visible. The speaker is not connected to the speaker terminals but rather to the Gain and VIN for some unknown reason. I cannot understand how some college-level people can go so wrong unless this is a late April Fool joke.
First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, 360, fairly knowledge in PC plus numerous MPU's & MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.
Hi Ron @zander,
I had already noted that @will had spotted errors with the earlier post, and it looked like this was a new, different single circuit ... so I didn't actually bother checking the earlier circuits, just tried to suggested ways to move forward.
I am guessing the possibility that any involved 'college-level' people are studying something other than electronics, but of course this is pure speculation.
Best wishes, Dave
@davee They have posted to 3 topics, but they are actually all the same I think. The schematic they posted is what I last commented on, but what @will commented on was a physical part. Upon closer magnified inspection, the physical wiring looks different, and in the case of the speaker now correct so that is good news.
First computer 1959. Retired from my own computer company 2004.
Hardware - Expert in 1401, 360, fairly knowledge in PC plus numerous MPU's & MCU's
Major Languages - Machine language, 360 Macro Assembler, Intel Assembler, PL/I and PL1, Pascal, Basic, C plus numerous job control and scripting languages.
My personal scorecard is now 1 PC hardware fix (circa 1982), 1 open source fix (at age 82), and 2 zero day bugs in a major OS.