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Evan TSW is an interesting place to go for ideas and for some interesting boards. Their Teensy daughter card for the Arduino may be a solution for retrofitting existing uBITX systems, but I need to look a bit closer to see if it solves the problem regarding not enough digital ports and the related problem of CW dits using an analog port. One potential software method to solve the dit problem without new hardware is to use existing digital ports for multiple purposes.? For instance, if we have a data and clock port for I2C, these ports could possibly be redefined at appropriate times as inputs for CW dit and dot keying and then redefined for I2C when needed to talk to a peripheral.? There are other digital ports that might be used in a similar manner.? I have not yet thought this through very well, so that may change when I have a better idea what I'm doing.? 8-) Going off in a different direction...... The use of analog voltages for CW inputs has curious voltage windows (thresholds) for dit versus dah.? Maybe just modifying the voltage thresholds for each window, or inserting a dead-zone between dit and dah windows, could be arranged to minimize misinterpretation of CW inputs?? This involves determining whether the voltage detection or timing for when the voltages are being read is related to the actual problem. Arv _._ On Sun, May 16, 2021 at 8:33 AM Evan Hand <elhandjr@...> wrote:
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