Morse Code Decoder In Numbers
Good at copying 35 word per minute code in your head? Nah... neither am I. With an Arduino, an LCD module and a few components you can have your own pocket-sized 'secret decoder' that will do up to 80 wpm, enabling even you the 'noob' to dive feet first into the CW bands with an electronic set of 'swimmies!'
While there are quite a few standalone Morse Code or CW decoders out there, I wanted to tackle the problem myself and end up with both a great Arduino learning project and a decent portable decoder for when I'm out in the field operating QRP. Now, before we get into debate over the virtues of learning to 'head copying,' I must suggest that it is better to be on the air and copy badly than to be an arm chair listener copying perfectly. ANY help a ham can get - if it leads to a path of more activity and proficiency - is preferable. Don't get me wrong, because I can copy CW in my head at 15 WPM and can easily recognize characters and some small words up to 40, but ADHD is a 'you know what' and it would be nice to have some help with the mental gymnastics.
You may have seen the many options for CW decoders readily available, either as a sketch you can freely download for your microcontroller dev board or some cheap overseas pre-built option even available on eBay for a little as $11. You have the computer software solutions that integrate with station management software like HRD. These will detect call signs, access the QRZ database and set up macros for quick contest keying for you. For you portable ops, there are even free apps for your smart phone. My offering isn't a competitor by any means or a unique solution, but just an academic exercise. If you like tinkering with electronics and Arduinos, and have the CW itch, then why not give this a try?
Where was I going to start? I searched a bit on Google and YouTube for examples for any 'Arduino CW decoder' project and found that there wasn't but a few unique options. Perhaps the task of decoding required fancier processing. By far, the most tried and used Arduino CW decoder project can be found here: http://www.skovholm.com/cwdecoder It first uses a variation of the Goertzel formula to detect the actual audio CW tone so you can hook your device right up to the radio with very minimal components, then it uses a look-up table to match characters to display them. Most YouTube videos for an Arduino CW decoder seem to use this sketch. The simplicity of a rudimentary DSP is this project's strong suit... however, with no overhead remaining after detection, it's ability to decode CW seemed very lacking.
Another popular option is the Morseduino by Budd Churchward, WB7FHC, found at: http://wb7fhc.com/arduino-decoder-sketch.html , http://wb7fhc.com/m2-cw-decoder.html and on other various project sites. Budd's Arduino sketch has to be one of the best structured ones I've seen and it's got a cleaver option for automatically 'tuning in' the decode tone using the popular and classic LM567 Tone Decoder IC from Texas Instruments, which as you will see with my project should be vastly preferred over the on-board Goertzel DSP tone capture option. However, just like the the prior offering, (and I believe it's the same,) the method for decoding leaves something to be desired. I have to take my hat off to one or two other builders who pioneered their own methods using a more 'digital' approach which sees the CW tones as 1's and O's, but even they admit it's only ok with rigid electronic code in a non-noisy environment.
So what's the preferred method of decoding CW? Surely the magic formula has been academically established since the days of yore. Well yes, to a degree. You should check out Loftur E. Jónasson, TF3LJ / VE2LJX's Arduino project at: https://sites.google.com/site/lofturj/cwreceive
Morse Decoder Apk
MRP40 Morse Decoder. MRP40 is a powerful and highly-effective ham radio software program that decodes received CW audio that has been fed to a computer’s sound card. Program that decodes received CW. The decoded text is. Very good decoding of weak. Morse Code Apps for iPhone and iPad. Morse Code Decoder. The HotPaw Morse Decoder (in the iOS App Store and the Mac App Store) is a Universal app for iPhone, iPad and iPod Touch (and now available as a Mac OS X app as well) which translates audio International Morse Code and CW audio into text using advanced DSP signal analysis techniques. The HotPaw Morse Code Decoder app includes both a. MRP40 is a powerful and highly-effective ham radio software program that decodes received CW audio that has been fed to a computer’s sound card. The decoded text is displayed on the computer’s monitor. For transmitting CW, the program encodes keystrokes from the computer’s keyboard. The Morse system for telegraphy, which was first used in about 1844, was designed to make indentations on a paper tape when electric currents were received.Morse's original telegraph receiver used a mechanical clockwork to move a paper tape.