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
#Cw decoder arduino code#
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. A Arduino UNO board and a LCD board and then a few components. 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
0 kommentar(er)
