Hi,I have created a isolated version of the common USB - UART converter for programming the Arduino mini.It have all the communication pins isolated: DTR, TX, RX and also CTS.This little board can be very useful if you are working on some projects and worrying to damage a USB port because of ground loop or a short circuit with the main power supply.Here our campain: https://www.kickstarter.com/projects/1351830006/isolated-usb-to-uart-converter-for-arduino-pro-min?ref=user_menuWe also made a short video: https://www.youtube.com/watch?v=ReD4d7x2PaoThanks!