Audio Processors
CH11 & 12

From: Microcontroller Projects for Amateur Radio by Jack Purdum, W8TEE

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page last updated 06/15/2021

All of the following is still PRELIMINARY

The following is a project to further explain and clarify the confusing information
presented in chapters 11 and 12 of the book :
Microcontroller Projects for Amateur Radio by Jack Purdum, W8TEE

To get the current book software source files from the  site make sure that you are logged in and can download the two links below: 

CH 11:  [2/5/2021] 

Ch 12:   [10/24/2020]

I have created several circuit boards to simplify the wiring and revised the schematics
to be more representative of the actual hardware and the supplied software.
Some changes were made to the pin assignments which will affect the software.

There was a group buy of three PCB's below in April from JLCPCB and all have been distributed.

There are Gerber files for the three above and two additional  Extender Board Gerbers  Display Adapter Gerbers  8 Push Button Board Gerbers  errors on board 4 Push Button Board Gerbers  error on board
Basically top half of the 8 Button Board.  Two would be required. None were ordered.

On the 8 Button Board positions 1 and 5 the + lead of the LED's were connected to the wrong switch pin.
On the 4 Button only position 1 was wrong.  New gerbers below.
Cut the + lead of the LED away from the bottom pin and connect to the middle pin on 1 & 5 positions.
Make them connect like they are below.  Traces are in Green on bottom side of pcb.

Uxcell switch information Uxcell 8x8mm Push Lock.jpg  8 Push Button Board Gerbers  4 Push Button Board Gerbers  Breadboard Gerbers for later construction
Link to Pix -  K9IVB Bread Board.png


The following documents were distributed to the individuals in the Group buy

PRELIMINARY Documentation for DSP Audio Processor Boards_4-10-2021.pdf

Required Parts Enumeration_4-10-2021.pdf

I am currently working on a detailed set of instructions for installing the portable
version of the Teensyduino into the Arduino IDE for both Windows and Linux.
This is taking a lot more time than I had anticipated.

I am behind on construction of the PCBs so that I can verify the software provided.
I have been able to compile/verify both CH 11 & 12 with some minor changes.
There were no issues with the "-master" in the downloaded zipped Github Libraries
when following the IDE instructions for "Add Zip Library" in the Portable installations.


contact info ok on QRZ