Design Details

A machine has a shaft fitted with an angular position sensor, which is an 8bit Gray Code generator having the freedom to rotate from 0 to 359 degrees. It outputs 00000000 when the shaft angle is 0 degrees.

(a) You are required to design a digital circuit to convert the incoming gray code value into a binary equivalent and then display the shaft angle in degrees using a 3 digit 7-segment display. (ignore the decimal part)

(b) Convert the digital signal to a 0 to 3V analog signal.

(c) It is necessary to display the following indications on the display panel and alarms

Angle(Φ)           Colour
0 < Φ ≤ 120      Green
120 < Φ ≤ 240   Yellow
240 < Φ ≤ 359   Red

Alarm : when the angle exceeds 345 degrees turn on the alarm

(d) You also need to provide a rotation direction indicator. i.e. the present position was reached by rotating clockwise or anticlockwise w.r.t. the previous position. Assume that 0 to 359 is a full clockwise rotation. The indication process need to be updated every o.25 seconds.

Define two deferent colours for indication

Your report should include (but not limited to) the following

1. The simulation files

2. Documentation of the simulation

3. Complete schematic

4. Indication of design process

5. Appropriate images from simulation software illustrating the output function of the design