LAB 2

b) Use the ALU 74181 in the figure below and the tables (one is enough; second maybe, need to check the new kit) to implement : A + B, A – B, A. B. (MSB) (LSB) 10 (MSB) F3 F2 F1 FO S3 Cn+4 16 s2 20 U14 15 S1 14 so A3 A2 A1 AO B3 B2 B1 B0 M Cn 24 23 22 21 28 27 T26 25 (LSB) (MSB) (LSB)(MSB) (LSB) And given that under M = 1 the circuit performs the following arithmetic and logic functions according to Table 11.1. Input selection S3 Output M-H S2 SI Cn=L. F3 F2 F1 FO A 1 -A В -B A&B AxB 1 A'B 1 Ax(-B) (-A)xB (-A)x(-B) 1 1 ACTIVE HIGH DATA M-L: ARITHMETIC OPERATIONS SELECTION M-H LOGIC s3 s2 s1 so Ino carry) (with carry) F-A PLUS 1 F- LA + B) PLUS 1 F- (A + BI PLUS 1 FUNCTIONS L L F-A F-A+B F-AB F-A H FA+B F-A+T F- MINUS 1 12s COMPL) F-A PLUS AB F- IA + BI PLUS AB L L L L F-0 F-ZERO F- AB F-A PLUS AB PLUS 1 F- (A + BI PLUS AB PLUS 1 L L L H L F-AOB F- AB L L F-A MINUS B MINUS 1 F-A MINUS B F- AB MINUS 1 F- A F-A PLUS AB PLUS1 F-A PLUS B PLUS 1 F- IA + B PLUS AB PLUS 1 L H L F-A PLUS AB…

Electrochemical Q2

2. An AC voltmeter uses a bridge rectifier with silicon diodes and a PMMC instrument with FSD = 75 µA. If the meter coil resistance is 900 Q and the multiplier resistor is 708 k2, calculate the applied rms voltmeter when the voltmeter indicates FSD.

a) Explain the importance of thermal management of electronics devices.  (b) Heat sink rated at 10°C/W will get 10°C hotter than the surrounding air when it dissipates 1 Watt of heat. Discuss the suitability of heat sink for above scenario in terms of thermal resistance. (c) Thermocouples are commonly used to measure temperature. There can be errors due to heat transfer by radiation. Consider a black thermocouple in a chamber with black walls Suppose the air is at 20 °C, the walls are at 100 °C, and the convective heat transfer coefficient is 15 Wm-2 k -1 . a) What temperature does the thermocouple read?  b) If thermos couple sees a higher temperature than air, how could you reduce this error?

A Stereo uses a 12 V DC power supply. At full volume, a maximum current of 1.4 A is drawn from the power supply. At minimum volume, the current drops to 200 mA. (a) You can simply consider the stereo as the load resistor RL. Calculate the range of R₁ at full volume and minimum volume. (b) Design a full-wave rectifier power supply using a 9.52:1 transformer. Assume that the outlet is 120 Vrms @ 60 Hz. Further assume that the diode turn-on voltage VD(on) is 0.7 V. Pick the value of C₁ such that vo has a maximum ripple of 1 Vp-p. Solve for the average value of v. = V. (note that this may be greater than 12 V) and iD(ave) = ID. (c) Add a series resistor to the secondary to limit the maximum surge current to 10 A if the secondary winding resistance of the transformer is 0.4 ohm. (d) Using PSPICE (with Is = 1 nA and n = 1.3 for the diodes), perform a transient simulation (.tran) and plot vo and Io(surge) for your max. and min. values of R₁. Make sure your transient simulation is long enough…

Define and describe the various circuit stages required to design a DC power supply(specifically, explain the required circuit stages of the empty boxes as shown below). Your answershould include names of the circuit stages, a schematic of an appropriate circuit to accomplisheach stage (no need to define values), and a short description of each circuit stage.

Please solve for following based on attached circuit: average laod current RMS load current average load power absorbed apparent source power

Suppose your car has the instrument cluster shown below. There is an an engine oil temperature gage on the left side. Would you use a temperature switch or temperature sensor for the gage? 2 O Temperature sensor O Temperature switch 3 1000RPM 1 CRUISING RANGE 403 Mi 8, ELAPSED TIME 041 7 P COMFORT - 20 717 OUTSIDE 40 TEIP A m 10.4 60 60 80 MPH 100 120 140 km/h 100 160 180 200 260 HOLD PAR 120 220 140 240 160 ARS

Consider the full-wave rectifier circuit below. RL = 10 kQ, Vy= 0.7V, the input voltage N₁ V₁ = 120sin(2 60t) V(rms). The transformer turns ratio = 20, where N₁ is the number of N₂ turns in the primary and N₂ is the number of turns in each of the secondary winding. a) Plot Vs and Vo on the same graph for two periods, assuming there is no capacitor (C = 0). b) Determine the capacitor value so that the ripple voltage is limited to 1V. Plot the output voltage on the graph from part a) c) Indicate on the graph where diode D₂ has the maximum reverse bias and determine Peak Inverse Voltage (PIV). VI Vs Vs D1 KH KH D2 с RL VO

A Half-Wave rectifier with a capacitor filter (capacitance is 4700 ?? ) supplies to a load an average current of 1.4 A at an average voltage of 19.5 V. Determine:  a) the ripple factor,  b) ????.