Arduelo Libero is a new Czech clone compatible board with the project Arduino Diecimila.
Arduelo find two identical 15 pin connectors, which are in the grid are symmetrical and do not cut. By gaining two new pins, which is taken aback input for an external oscillator. Switching is achieved by using connectors (jumpers) next to the crystal. Another small change is to move all the LEDs, and resetting the buttons on the side, outside the connectors that are available even when deployed module.