Answers for Unit 7

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Task03 1. Sensors are used to monitor the pressure and temperature of a chemical solution stored in a vat. The circuitry for each sensor produces a HIGH solution when a specified maximum value is exceeded. An alarm requiring a LOW voltage input must be activated when either the pressure or the temperature (or both) is excessive. Draw a truth table with the desired inputs and outputs and from that design a circuit for this application. Two inputs → P T P - Pressure T - Temperature If either the pressure or the temperature or both parameters increases the specified value, a high voltage must be produced. Those high voltages must be converted to low voltages and supplied to the alarm to make rings. |P |T…show more content…
Explain what does and what processing takes place. i. A payroll system ii. A Booking system iii. A Supermarket checkout system iv. An Electricity billing system Task 03 1. Sensors are used to monitor the pressure and temperature of a chemical solution stored in a vat. The circuitry for each sensor produces a HIGH voltage when a specified maximum value is exceeded. An alarm requiring a LOW voltage input must be activated when either the pressure or the temperature (or both) is excessive. Draw a truth table with the desired inputs and outputs and from that design a circuit for this application. 2. Digital circuit has three inputs A, B and C and three outputs X, Y and Z.The truth table is given below. Determine separate Boolean expressions for X, Y and Z and draw the logical diagram. |C |B |A | X | Y | Z | |0 |0 |0 |1 |0 |0 | |0 |0 |1 |0 |1 |0 | |0 |1 |0 |0 |1 |0 | |0 |1 |1 |0 |0 |1 | |1 |0 |0 |0 |1 |0 | |1 |0

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