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technical stuff, hopefully useful to some: Programming an Arduino Pro Mini using Arduino IDE and a FT232RL FTDI USB to TTL Serial Adapter
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How to Upload Program or Code Into Arduino Pro Mini by Using CH340 UART Serial Converter Cable : 4 Steps - Instructables
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How to program Arduino Pro Mini with FT232RL FTDI USB To TTL Serial Converter Adapter Module - YouTube
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Arduino : programming an Arduino Pro Mini with an USB TTL Dongle | Arduino, Arduino projects, Simple arduino projects
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