LAB 1

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…

A J- type thermocouple is used to measure the temperature in a heating process. The length of the air gap is 12mm and thickness is 0.2mm. If the thermal conductivity of material (K) is 0.025W/m-K, density of the material is 1.2 kg/m3 and specific heat capacity is 1005 J/kg-oc. Find the time constant of the air. Time constant of the bare material is, T=

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.

The figure to the right illustrates the market for coffee in Colombia. Suppose the demand for coffee in Colombia is DColombia and the supply in Colombia is Scolombia: The world price of coffee with free trade is Pw 1.) Using the point drawing tool, indicate the quantity of coffee demanded at the world price (Q) in Colombia and the quantity of coffee supplied at the world price (QS) in Colombia. Properly label each point 2.) Using the point drawing tool, indicate the domestic market equilibrium price and quantity for coffee in Colombia if trade were completely eliminated. Label the point 'E' Carefully follow the instructions above, and only draw the required objects. PW Price per pound Quantity (Pounds of Coffee) SColombia Peolombia

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

Thermal question. What time constant τ = CthRth is needed so that a 1 kW electrical system that is 90% efficient reaches its steady-state temperature within about 5 time constants. The ambient air temperature is 50 °C.    A. Doesn't matter, the system will always reach its steady-state in about 5 time constants.   B. Can't be calculated because there are missing conditions.   C. No, that's impossible.   D. 5 s

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) ????.