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The most interesting question was: "why are there no problems with other projects". In search of an answer to this question, I have replaced the Attiny85 with another one. I uploaded the code and put the IC into the socket. Yes it works!!!
I have done many tests and there was no problem.
I am really sorry for taking your time.
It was a chip issue. I have thrown away the faulty ICs and replaced them with new ones. Now everything works fine.
But...
During the research for this problem I found out that one RC manufacturer (Futaba) uses 2.7V output signal. This will definitely not work and will need the signal amplifier. This inspired a new idea. I have modified the code to check the signal polarity at boot-up. Now I can feed the controller modules with either positive or negative pulses.
Thank you all so much...
I have done many tests and there was no problem.
I am really sorry for taking your time.
It was a chip issue. I have thrown away the faulty ICs and replaced them with new ones. Now everything works fine.
But...
During the research for this problem I found out that one RC manufacturer (Futaba) uses 2.7V output signal. This will definitely not work and will need the signal amplifier. This inspired a new idea. I have modified the code to check the signal polarity at boot-up. Now I can feed the controller modules with either positive or negative pulses.
Thank you all so much...
