This learning module presents basic methods used in interfacing micro-controller modules such as the MicroStamp11 to external analog and digital circuitry. In particular, this module covers interfacing between the MicroStamp11 to mechanical switches and LEDs. In particular, you will build a circuit that drives a seven-segment LED display to display the value of an integer counter. The counter will be incremented or decremented by two buttons that you've connected to the MicroStamp11.