Add compatibility with the 40-pin GPIO standard to your XU4 or XU3/XU3-Lite*. Use almost any accessory designed for the ODROID-C series 40-pin header or the Raspberry Pi's 26-pin and 40-pin headers with your XU4! All the native GPIO pins on the XU4 operate at 1.8V. However, many devices support only 3.3V or 5V. This level shifter board contains 3 x TSX0108E bi-directional level shifter ICs. The 30-pin and 12-pin GPIO ports on the XU4 are converted to the more common 0.1inch (2.54mm) pitch 40-pin header. All the signals can be level shifted to 3.3V and 5V. You can choose the voltage with a small hardware slide switch on the board. The 40-pin header pin map is compatible with the ODROID-C1/C2/C4 and Raspberry Pi/Pi2/Pi3/Pi4. We are working on WiringPi compatible libraries to simplify development. * The XU3/XU3-Lite requires modification or removal of the 12-pin socket on the XU4 Shifter Shield KEY FEATURES Converts the XU4's 30-pin and 12-pin headers to standard-pitch 40-pin compatible header Adjusts voltage from 1.8V to 3.3V/5.0V with hardware switch Stacks nicely on top of XU4 with included hardware Contains prototyping area for projects INCLUDES XU4 Shifter Shield Board 4 x 19mm PCB spacer (Metal) 8 x 10mm PCB spacer (Plastic) LINKS Schematics - http://dn.odroid.com/homebackup/XU4_SHIFTER_SHIELD_REV0.1.pdf PCB Mechanical Drawings (AutoCAD format) - http://dn.odroid.com/homebackup/XU4_SHIFTER_SHIELD_REV0.2_DXF.DXF Mikronauts Review - http://www.mikronauts.com/hardkernel/hardkernel-odroid-xu4-shifter-shield-review/ Warranty is valid for two weeks, starting upon date of receipt.