Teensy 3.6 without Headers - SparkFun DEV-14057 rpa58104b you can use 1Sheeld as

you can use 1Sheeld as input or output from Arduino and make use of all of the sensors and peripherals already available on your Android smartphone instead of buying the actual shields

Important: This is the older 8-bit Teensy option

400 tie points (four independent common bus lines)

Continuous rotation

Teensy 3.6 without Headers - SparkFun DEV-14057 rpa58104b you can use 1Sheeld asHigh Speed Teensy 3. x Board for USB Host, Audio, and Large Embedded Projects The Teensy 3. 6 without headers is one of the most capable boards in the Teensy 3. x line. It gives you more speed, more memory, more buses, and more I O for bigger robotics, audio, USB host, and data heavy projects. With its 180 MHz ARM Cortex M4, larger RAM and Flash, USB host support, and native SD features, it is a strong fit when a compact board still needs serious