An embedded system incorporates an MSP430F2274 clocked by a 4.096MHz at 3.3V, driving two seven-segment displays and two discrete LEDs. The seven segment display draws 7.5mA per segment at 1.8V and the discrete LEDs operate with 10mA each at 1.6V. Three push-buttons are needed for completing the user interface. Design a suitable interface to connect all LEDs, seven-segments, and push-buttons. Estimate the circuit power requirements and recommend a non-regulated power supply and a suitable regulator.