CPO1 Code Practice Oscillator

Build the CPO1 Sine Wave Code Practice Oscillator

I stopped kitting this Code Practice Oscillator a couple of years ago. I still get the occasional email asking if I have any left, so I’ve decided to release the files necessary to build one via a Creative Commons, No Commercial license.

At this time, I don’t plan to release the DipTrace CAD files. The download below contains all of the documents necessary to procure parts and to build the CPO1.

Download the files here:
CPO1 Code Practice Oscillator Manufacturing Files

The PCBs can be ordered from any of the low cost prototype PCB manufacturers. A good source to get price comparisons and to read reviews on the different shops is pcbshopper.com.

Check with the particular manufacturer you choose for their file naming conventions for the Gerber files.

A spreadsheet containing the bill of materials, component sources and manufacturers is included, along with an assembly manual and a PDF copy of the schematic.

These files are intended for non-commercial, personal use only. If you want to get together with some friends, scouting group, etc and share the costs, that is fine with me. All I ask is that you don’t produce this kit commercially and/or for profit.

I don’t have inventory of any of the parts. The BOM spreadsheet should provide all the information needed to order what is necessary.

Code Practice Oscillator

This website is the continuation of my old website at www.wb5tfv.com. That site is no longer maintained but I intend to keep it active for the foreseeable future. The original version of the CPO1 Code Practice Oscillator is described there.

Here is a photo of the assembled kit in its current configuration:

cpo1_photo
CPO1 Code Practice Oscillator

Based on feedback received from the initial run of kits, there are a couple of changes to the CPO1.

  1. The key jack (J2) has been rewired to accept either a stereo or mono 3.5mm plug.
  2. C6 has changed from a 100nF capacitor to a 10uF electrolytic.

The new schematic is shown below. A PDF version can be downloaded here: CPO1 Schematic

The manual for the kit can be downloaded here:
CPO1 Assembly and Operations Manual

schematic-1000748c_cpo1
CPO1 Code Practice Oscillator Schematic