Jerry Does the new Teensy daughter board for the Raduino still use the resistive voltage divider to detect whether the CW paddle closure is DIT or DAH?? If that is true, then it might seem that the problem may be more related to timing than to voltage thresholds.? If that is true, then moving the routine that reads the ADC might be something to look into.? Just repositioning the ADC read call in original Arduino code might be all that is needed for those who are stuck with version 3, 4, 5, or 6 Arduino and the original Raduino.? Since the original goal of BITX designs was to make a rig that those with limited funds could use to get on the air, it would be great if this DIT versus DIT..DAH problem could be fixed with just a simple change in software. Arv _._ On 2021-05-16 07:33, Evan Hand wrote: |