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An automatic security camera must operate as follows when an intrusion occurs:
1. If the ambient light level is greater than, the shutter is activated.
2. If ambient light is less than, a light source is triggered.
3. When the source lighting reaches, 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 given Figure is used to monitor ambient light level.
c. A photodiode with the characteristics given in Figure b will be used to measure light intensity after the light source is triggered. Explain why the CdS cell could not be used here also.
Explain what voltage regulation is and how it is achieved. Also, describe a specific application of a voltage regulator.
Given the waveform of given figure for the current of a 20-µF capacitor, sketch the waveform of the voltage vC across the capacitor if vC = 0 V at t = 0 s.
A pressure measurement system is stated as having the following characteristics. Range: 0 to 140 kPa; Accuracy: ±1.5% of the displayed reading; Temperature sensitivity: ±0.1% of the reading per °C If the instrument indicates a pressure of 120 kPa
a. Given a circuit with a VCVS (A=1000) in series with a 100K ohm resistor, convert this circuit to a VCCS in parallel with a resistor R. b. Connect both circuits to a 25K ohm load resistor and show they produce the same behavior in the load resis..
The resulting energy excursion resulted in the destruction of the reactor containment and a large amount of the fission products in the fuel elements were released to the environment as the reactor containment ruptured. Explain why the boiling..
How many check bits are required for a distance-3 Hamming code for 8-bit data words? Sketch a parity-check matrix and write the equations to compute each of the check bits.
what is the minimum number of bits required to represent each of the following decimal numbers 10 1000 100000 and
A M-bit thermometer code for the number k consists of k 1's in the least significant bit positions and M-k 0's in the more significant bit positions. A binary-to-thermometer code converter has N inputs and 2^N-1 outputs.
how many bits are required to represent the decimal numbers in the range from 0 to 999 using straight binary code?
Phosphorus atoms, at a concentration of 5*10^16 cm^-3, are added to a pure sample of intrinsic silicon. Assume the phosphorus atoms are distributed homogeneously throughout the silicon sample. What is the fraction by weight of phosphorus
calculate ratio of the area to volume for unit cube, a unit sphere inscribed inside the cube and as right cylinder inscribed inside the cube.
A priority decimal-to-BCD encoder has active-LOW inputs andoutputs. If there are LOWs only on decimal inputs 2, 5, and 8, what BCD code appears on the outputs
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