CW Practice Oscillator Kit

Code Practice Oscillator

Microrusty.com 2024

I decided to make a CW practice board for Morse Code training for my local HAM club. I have donated all 10 boards to the club.
It was a simple process to use KiCad 7.0 to design the board.
I am not going to explain how to use KiCad in this wiki page since I have other wiki pages explaining how to use KiCad.

This project uses a NE555 timer SMD SOIC-8 Chip that produces a square wave that can be adjusted between 300Hz and 1KHz 
The power source is a 9Volt battery that is connected to J1 via a 9V BATTERY STRAP from Mouser Electronics.
This Kit was designed to be adjustable for the user to change to the tone to their preferred listening levels. 
RV4 is a 200K ohm variable resistor that controls the tone between 300Hz to 1KHz. 
RV3 is a 100 Ohm variable resistor that controls the volume.
The CW key is connected to a 5mm Terminal block that is label CW Key
This Kit comes with a 55mm Speaker that is connected LS2 (Version2 Bd) - J3 (Version1 Bd) and placed underneath the bottom of the PCB. 
There is another speaker connector that uses a 5mm Terminal block with the label Speaker for larger speakers.

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Code Practice Oscillator Schematic

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Code Practice Oscillator Schematic Parts

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