I am trying to make a FSK Transponder that switches between 90 and 100 khz (No return to Zero) but I miss the details to start.
I saw the projects DIY FSK RFID Reader and How to make a FSK Rfid Tag that works at 125 kHz. I also see that Demodulating FSK radio signals uses Softserial to do it but I’m not experienced enough to get going.
Can someone help me going or awnser if it is possible with the arduino?
At first I like to buld a datalogger to understand the data. In a second fase I maybe want to build an transponder to see if i understand the data but first I have to see if my info is correct about how it works.