Simple FTDI PTT & CW Keying Interface - VK4GHZ
Simple FTDI PTT & CW Keying Interface - VK4GHZ

This interface uses the RTS and DTR signal lines from a cheap FTDI USB Serial Adapter, and provides isolated keying for both PTT and a CW key.

https://vk4ghz.com/simple-ftdi-ptt-cw-keying-interface/



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