As [Konrad Beckmann] demonstrated on Twitter, all you really need is a UART, a cable and a TRS phono plug. In this case a USB-TTL adapter based around the FTDI FT232R ... to the wiring of a ...

This stemmed from a review of a friend’s circuit design that used the UART in the project, but also called for an FTDI chip in order to reprogram via USB and a bootloader. Unlike the schematic ...

Future Technology Devices International (FTDI ... USB to digital level serial interface product range. The devices which interface USB 2.0 with digital level UART cables incorporate the firm’s FT232H ...