This board, shown in the photo below, is Wyolum's answer to interfacing any number of hardware shields, sensors and servos to the Raspberry Pi.
AlaMode is an Arduino compatible board that plugs right on top of the Raspberry Pi computer. It also gives you:
- extremely accurate real time clock DS3231 with backup battery
- micro SD slot
- direct headers for plugging in servos
- safe voltage translation between the Raspberry Pi and Arduino.