Week 11: (21/4/14 - 25/4/14)

Hardware Design

The hardware design can be separated into two section which are, circuit construction and casing development. For circuit construction I have designed the PCB layout using DipTrace for both circuit. For casing development, I made a box that can be fix for both circuit including the volt and amp meter display.

Week 10: (14/4/14 - 18/4/14)

Simulation Results

For this week, I have done several simulation on my circuit. The idea is make some further comparison with the calculation. For PWM circuit, I put it the output into oscilloscope to see the Ton and Toff by setting Rv ratio for 10% to 90%.

For buck boost circuit, the same range of Rv ratio was applied to see the output voltage for both buck and boost operation mode.

Week 9: (7/4/14 - 12/4/14)

Simulation on The Whole Circuit

The circuit that I designed consist of MOSFET, diode, DPDT switch, 555 Timer, transistor, LED, variable resistor, resistor, capacitor, and inductor. After several simulation, this circuit is working fine.

Week 8: (31/3/14 - 4/4/14)

Redesign The Whole Circuit

For last week problem, I have come out with a better solution. Based from my research it is better to design a combination of buck and boost circuit rather than a buck boost circuit. The combination of the circuit still can perform buck and boost in one circuit and it give a positive output value. The concepts are, during buck operation, Q1 will receive signal from PWM while Q2 is left as open circuit. And during boost operation, Q2 will receive signal from PWM while Q1 is left as closed circuit. This can be achieve by putting another switch for example double pole double throw DPDT to perform the task.