Hi Rafael;
No Worries. We are fortunate to have all the source code at our fingertips so that we can review, improve, change, and learn from.
I have a couple Digispark modules laying around that might serve for code testing. They have a USB boot loader which makes for easy code downloading.
Power/SWR detection kits are available on ebay cheap. They look very much like what Diz used to offer.
Since we have all the source code, it would be easy to move from the attiny85 to an AVR module with more inputs like a Nano, and use the extra analog inputs to do things like read the power supply (battery) voltage, and the PA temperature. One could easily connect a potentiometer to an ADC input and use it for direct control of CW speed, or RF power. The extra digital inputs could be used to control the sending of pre-recorded CW or voice messages.
73; Steve, N3SB
