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[[Image:%3Fattach%3D34008;image.jpeg|thumb|USIfAC II]]
The '''U'''niversal '''S'''erial '''I'''nterface '''f'''or '''A'''mstrad '''C'''PC (USIfAC), currently in version 2 (Styled USIfAC II), is a modern serial interface based around a PIC microcontroller designed and built by [[ikonsgr]] from the CPCWIKI Forums.
The only chip on the board is the 18F47Q10 PIC. The PIC software is written in Great Cow Basic and has been released by [[ikonsgr]].
The board allows for TTL serial output and connection to a USB Stick as well as a ESP8266 WIFI module.
The board has been used for many purposes including:
