light controlled motor project

Design a motor controller based on the light level on a phototransistor. When illumination is very high, the motor will be stopped while 6 volts will be applied to the motor under low light conditions. Measure (characterize) the properties of the phototransistor under both light and dark conditions in order to design the circuit and calculate component values. Be sure to justify all component values and provide calculations for critical parts of your design. A table listing all components and briefly noting how values were derived is required. An op amp is be used in the project along with a TIP-31 transistor. Good parts layout along with the use of bypass capacitors will greatly increase the likelihood that the circuit meets all specifications. Design the audio signal generator as specified above and demonstrate that it works in LTspice The example below is an example that was not completed but thats how the format of the project is suppose to look.