![]() The decoder is designed for code speeds ranging from about 6 words per minute (WPM) to greater than 36 WPM. But to do this you need a device that copies and displays the code in parallel with you, which is what the stand-alone device described in this article is designed to perform. One way out of this delimma is to remove the burden of writing down the characters altogether during the process of building up your code speed. Furthermore, when you make a mistake, the entire process collapses as your mind tries to perform error correction, trying to fill in the missing blanks, causing you to miss even more characters. The problem for most people is the non-real time nature of the process, i.e., writing down the last character while listening to, and decoding the signature of the next character. However, like thousands and thousands of others, you have trouble learning the code. not having obtaining that age old badge of proficiency that differientiated the HAM from other radio operators. So you want to become a HAM, or you've got one of those no-code licences, but like me feel somewhat lacking. NOTE: I changed the header to be used with the PIC16F84A since those are readily available from Microchip.Ĭlick Here for the revised PIC assembly source code.Ĭlick Here for the revised HEX assembly source code. I also included the compiled hex file as well. Once this block of code is removed, it should compile. I have not had time to fully break apart the code yet, but I am assuming the extra code that exists with the duplicate label is extraneous and should be removed. You will notice that the code does not compile because of I am assuming that the code has been copied and pasted so many times that things have been jumbled. I have seen this problem all over the webĪnd I too have ran into the same problem when compiling the code. Most of them are because of the bad source code listing at the end of the author's notes. I have been getting a lot of emails about this project. Click Here for the the original Author/Designer's notes and pictures. ![]() This project is right up my alley! I gathered all parts and started building the circuit on a breadboard first before designing the circuit board to etch. Please see the help file on the HotPaw website for hints as to how to solve decoding issues.Morse Code Decoder Circuit - Using a PIC Microcontroller Decoding will not work if the audio filter or WPM are set incorrectly, or there is a lot of background noise or room echoes above the threshold setting. or background noise threshold level properly. Please use the manual settings if automatic decoding does not adjust to the frequency, WPM. You can see if sound is getting to the iPhone by seeing a peak in the spectrum display. Please aim your iPhone microphone at the Morse Code sound source so that the iPhone's noise cancelling microphone doesn't cancel it out. A QRQ High Speed WPM mode setting allows decoding much higher WPM speeds in the range of 30 to 80 WPM. You can also manually set the WPM code speed if the automatic speed detection guesses incorrectly. The Morse code WPM (words per minute) detection speed is automatically adaptive from about 8 to 40 WPM, and can be locked to the current estimated WPM dot speed. Please do not try to decode tones outside this range. The audio filter works for tone frequencies from 300 to 2400 Hz. Use the optional narrow-band DSP audio filter to help filter out background noise. The Morse Code Decoder includes a built-in spectrogram to help determine the audio frequency of the Morse Code tones. ![]() Manually adjustable parameters include the frequency of the audio filter, the WPM dot/dash speed used for detecting characters, the threshold level of background noise, and whether Farnsworth timing is to be used for detecting spaces between individual characters. The Morse Code Decoder includes both an automatic decoding mode, plus manual controls to allow the decoding of weaker signals in noise and QRM. Just use the microphone or headset input on your iPhone or iPad for the audio signal input, and watch decoded text appear. The HotPaw Morse Code Decoder translates Morse Code sound into text.
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