“Building the MORSEDUINO Morse code reader”
I would like to thank Andy KJ7RFN for building this nifty little morse code reader.
He built the kit last summer and when he gave it to me, we sat down and started to play with it immediate success.
Connecting to the board is so easy, the audio input and the headphones output connectors are standard miniature 1/8″ jacks. There is a 2 wire DC power input that feeds a 7805 5Volt regulator located on the board. Today’s hook-up will be using 9volts DC.
#1 Circuit board layout
As you can see, the circuit board is laid out clearly and isn’t overly crowded.
#2 Component layout
The program will automatically adjust to the speed of code that is being sent.
The first few characters may come out wrong while the unit is homing in on the correct speed. If it doesnt start to decode solid copy, press the reset button on the Arduino.
The software tracks the speed of the sender’s dahs to make it’s adjustments. The more dahs that are sent at the beginning the sooner it will lock on to solid copy.
This project is built around the 20×4 LCD display. The sketch includes functions for word wrap and scrolling. If a word extends beyond the 20 column line, it will drop down to the next line.
When the bottom line is filled, all lines will scroll up one row and new text will continue to appear on the bottom line.
Video of the reader in operation while receiving morse code from my laptop running the G4FON CW trainer.
This is being sent at 20wpm from the laptop, with an audio level out of about 25%.
Building this board into a small plastic box with built in batteries should serve you well if you want to use it out in the field for POTA or SOTA or anywhere really.
Battery consumption is fairly low, it was measured at a little more than 5Ma and of course changes depending on what the processor is doing.
I have seen these kits advertised online from $29.00 to $45.00.
There are several You Tube videos on this kit including troubleshooting in case you have a problem getting yours to run right after assembly.
Taking your time when placing the components and being sure that you have right part in the correct location should yield a finished product that will give you many hours of reading. I found the project great to follow along when I was trying to get my cw proficiency back up to speed.
73 until next time _.. / . / ._ _ / _… / _…. / ._ / _ _ / _
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