An automatic security camera must operate as follows when arn intrusion occurs: 1. if the ambient light level is greater than 20mw/cm2, the shutter is activated. 2. if the ambient light is less than 20mw/cm2 a light source is triggered. 3. when the source lighting reaches 20mw/cm2, the shutter is triggered. design the system and signal conditioning using the following assumptions: a. the shutter and light source are triggered by ttl logic high signals. b. a cds cell with characteristics given in figure 6.9 is used to monitor ambient light level c. a photodiode with the characteristics given in figure 6.16b will be used to measure light intensity after the light source is triggered. explain why the cds cell could not be used here also

Find the steady-state temperature at the center of the plate = /2, = /2) for sums of w from n=1 to n=19 (only odd values). find the value of n for which the change in /2, /2) is less than 1% from the value at the previous n. at this point, we consider the solution converged. does the value of the temperature at the center seem reasonable? in this part, the values of x and y are constant scalar values. you should produce a plot of the value of n on the horizontal and the estimate of the temperature at the center of the plate on the vertical. b. using the value of n (or larger) that resulted in convergence in part (a), create a contourf plot of the temperature distribution across the entire plate. use enough spatial subdivisions to create a useful plot. comment on the results. hint: you need to determine what “x” and “y” values to use to make your t matrix. i recommend using a different number of x and y values. use enough x and y values so that the plot is “smooth”.