Here you can find an other danish ham which have been working on the code Here a project from a oz1edr oz1edr.dk/Arduino%20Uno/CW%20dekoder/Arduino%20CW.htmĪnd another link and in a USA ham newspaper /pdfs/HARC%20October%202014. Here you can see Mr.Chiba very fine website /entry/2015/28Īnd here you can see how JA9MAT Hidehiko build it with chinese letters Download Mr.
Figure 6 shows the three circuit boards that make the Arduino CW Trainer. I use it to train my own Morse keying skills. Figure 6, The three circuit boards that make the Arduino CW Trainer. Zodra er in de mode CW (morse code) wordt uitgezonden door het station dat je aan het beluisteren bent.
Here you can download the code : Download version 1.1 Right click on the mouse and chose save as. Arduino Morse Decoder: This device reads hand keyed Morse code from a signal key (or an ordinary switch) and translates it to plain text and show the Morse code you're keying on an LCD. Zelfbouw CW decoder met Arduino en LM567. If you get a lot of noise in when you have your volumen on the prefereed place then set the 2 values up with 50. here they are 100, if your transiver shall be turned up to get the decoder working then set the values down. Go 50 up or 50 down with both of them in same time. If you have trouble with the audio is to high og to weak yo can try to set the 2 values for magnitude. NOW YOU CAN USE THE DECODER WITHOUT ANY MORE MODIFICATIONSīut if you want another center frequency you and want to change how wide the filter shall be, you have to change the following lines also.īe aware of that you can only chose some excact frequencies and only a specified number of samples.įor a start take the n=48 ( testdata ) and then you can chose 558 hz or mabye 744 hz which are good for recieveing. Then you have to set which pin you use for AudioIN and which pin you use for the Led. Tell the liquidcrystal library which pins you use for the display and underneath that which kind of display you have just connect and then the code will manage when you have done the setup. The code can take different kinds of displays 2*16 or 4*16 or 2*20 or 4*20. Just 2 10k resistors betwen gnd and 5 volts and then a capacitor in serie with the audio signal. I built an external PIC12F675 micro controller ELKEY and I want to control my transmission on the morse decoder. I would be very happy if you could write the program on an I2C LCD. A Arduino UNO board and a LCD board and then a few components. If I can request an I2C 4-wire connection of the LCD output to a PCF8574 adapter I want to use my giant display but it only has 4 wires. You can read about the goertzel formular here :Ĭourses.cs./courses/cse466/12au/calendar/Goertzel-EETimes.pdf Hardware build by OZ2HNS for use in our clubstation OZ8SMA Here is a video where you can see the decoder in function. The magic in this code is the tone detection based on the goertzel formular, which means that you just put in the audio on an analog pin and then the processor make some calculations and if there is a tone you will get a magnitude value.
If you want to build a cw decoder without using other active components than an atmel 328 - Arduino UNO, then this is sure something for you. EASY BUILD CW DECODER BASED ON DSP GOERTZEL CODE