Engineering Diploma Resource Guide ST450 ETP Electronic Circuits (Engineering)

Transcription

1 Engineering Diploma Resource Guide ST40 ETP Electronic Circuits (Engineering) Introduction Electronics makes a fundamental difference to modern life. The birth of this technology is a story of the twentieth century, notably the inventions of the vacuum tube, transistor and integrated Electronics technology has allowed the car to develop into a sophisticated machine with low emission, high fuel efficiency and exceptional comfort. LCD TVs, Ipods, laptops and mobile phones, to name but a few, are everyday items that most people expect to own and rely upon. This resource has been devised to introduce electronics using a practical hands-on approach. It includes construction of circuits using unique carrier based components that plug into a patching system and prototyping techniques of breadboard, stripboard and PCB. Electronic components and devices are progressively introduced on a need-to-know basis using real world project applications. The content covers safe working practices and understanding of electronic principles; recognition and selection of components; construction of electronic circuits; circuit testing and fault finding. Delivery This resource consists of assignments for Foundation (Level ) and assignments for Higher (Level ). Each assignment comprises a variety of separate activities. These assignments typically begin with a PowerPoint presentation that enables the teacher to introduce the background information required to complete the other activities within the assignment. Each assignment contains between one and two hours of study. Demonstration activities are carried out by the teacher using a physical training rig. Students carry out hands-on activities using a software simulation of the hardware, allowing all students to carry out practical activities at the same time. The students also have an opportunity to verify their solutions using the hardware system. Using project kits, students build circuits on breadboard, stripboard and PCB. This resource has been devised to specifically address Unit 6 Electronic Circuit Construction and Testing at Level and Unit Electrical and Electronic Circuits and Systems at Level. The assignments can be carried out in a sequence to deliver these units. Alternatively, assignments or even activities * could be used to support the focus of the centre devised learning activity. For example as part of the activities in Level Unit 4: Producing Engineering Solutions, students are required to plan, make and test an engineered product. The baby alarm circuit of assignment 4 could form the basis of their product. The following grid highlights where in the diploma the resource might be used to support specific elements or the focus of the centre devised learning activities. Assignment Title Level Units Level Units Level Units Lamp Circuit 6 4, Polarity Tester 6 4, LED Lamp Circuit 6 4, 4 Automatic Light Circuit 6 4,,7 Building on Breadboard Automatic Light Circuit 6 4, 6 Improved Automatic Light Circuit 6 4,,7 7 Building on Breadboard using Integrated Circuits 6 4, 8 Intruder Alarm 6 4, 9 Building Circuits on Stripboard Anti-theft Device 6,4,,8 * Note where assignment activities are selected in isolation, marking moderation will be required to account for non-completed activities. Diploma Resource Guide (Electronic Circuits Engineering) P7487a

2 Assignment Title Level Units Level Units Level Units 0 Flashing Doorbell 6 4,,7 Building Circuits on PCB Continuity Tester 6 4,,6,7 Lift Door Controller 6 4,,7 AC to DC Conversion 4, 4 Baby Alarm 4,,7 Road Crossing Controller 4,,7 Hardware and Software Applications 6 4, Assessment Assessment is designed to test the students through both formative and summative methods. The curriculum includes continuous assessment, assessment tests and a workbook journal to create a portfolio of work during the lessons. End of Unit diploma assessment sheets are also provided, one for Level and one for Level. These contain task instructions for students to follow so that they can be assessed against the marking criteria of the unit. The tutor PowerPoint presentations have the option to be used in conjunction with the ClassAct Student Response System. This enables students to be assessed on tutor led activities. For assessment of Unit 6 Electronic Circuit Construction and Testing at Level and Unit Electrical and Electronic Circuits and Systems at Level, refer to pages and 6 of this document. Differentiation Each tutor will require different outcomes and levels of understanding from the resource, depending not only on the level of the diploma and the unit they are delivering, but also the context within which it is being utilised. Tutors will need to review the activity within the resource they intend to use and identify whether any differentiation or adaptation will be required. This may be achieved in a number of ways. Editing Tutor Presentation Where PowerPoint presentations have been included they are designed to cover the required knowledge for the learners to successfully complete the rest of the assignment. If the tutor is using only the PowerPoint element or coupled with just one practical activity, they may wish to edit the content of the PowerPoint to deliver only the required content for that practical or alter the content to fit with another centre devised activity. Example: Tutor A wishes to edit the Resistors PowerPoint in assignment to just cover colour coding. This will serve as reference point for students to access as and when required within the learning of Level Unit 6. Selecting Specific Activity Tutors might want to utilise one activity from an assignment to demonstrate a specific principle or topic omitting some of the more detailed knowledge. Example: As part of the study in Level Unit 7: Applications on Maintenance Techniques in Engineering, Tutor B asks students to perform the fault finding activity of an automatic light circuit in assignment 6. Once students identify the need to follow a systematic test to determine the failure of equipment they can then devise their own test schedule. Note where assignment activities are selected in isolation, marking moderation will be required to account for non-completed activities. Diploma Resource Guide (Electronic Circuits Engineering) P7487a

3 Tutor Devised Activity The tutor may wish to develop their own learning activity focused around the provided hardware or one of the software applications. This practice is highly recommended wherever possible in order to not only maximise use of the resource but also personalise the learning from both the tutors and learners perspective. Example: Having created a range or circuits in the simulation package, Tutor C prints these circuits out in schematic format and asks students to reproduce the circuits using the simulator in component view. The tutor also asks students to describe the operation of the circuits. The tutor devised activity enables assessment of a student s recognition of symbols, components and operations within Level Unit. Personal Learning and Thinking Skills (PLTS) The grid below highlights where opportunities exist using the resource s assessment methods to indicate achievement of the required PLTS statements. Other opportunities could be formulated with further input from tutor or student. Assignment IE CT RL TW SM EP 6,, 6,, 6,, 4,,4,6,,,6,6,, 6,, 6,,4,6,,,6,6,, 7 6,, 8 6,, 9 6,, 0,,4,6,,,6,6,,,,4,6,,,6,6,,,,4,6,,,6,6,, 6,, 4,,4,6,,,6,6,, 6,, Module Review,6,, Key: IE Independent Enquirers CT Creative Thinkers RL Reflective Learners TW Team Workers SM Self Managers EP Effective Participators Functional Skills This resource has embedded within it many opportunities for contextualised functional skills teaching, both through the structure of the delivery and also specifically in the nature of the activity content/task. Presentations and Demonstrations These activities offer scope to engage students in speaking and listening tasks within an engineering context. Students can show understanding of tutor led tasks through integrated assessment questions or in direct dialogue with tutor and other students. Alternatively students could investigate a topic independently or as a small group and then perform the presentation/demonstration to the whole class. Diploma Resource Guide (Electronic Circuits Engineering) P7487a

4 Research These activities will allow students to show competence in a variety of functional skills, such as reading and extracting information and using ICT based sources to obtain and record information. Practical Investigation Students will have opportunities to apply core functional skills during practical investigations. They will have to access software applications, operate equipment, read text and follow written instructions. They will also have to write text and record data to document their understanding and observations. Assignment Review In each assignment students are invited to complete a review of their study noting any salient points and highlighting the main outcomes of their learning. These reviews allow students to practice their writing and communicative skills whilst reinforcing there technical understanding of engineering. Tutor Devised Activities Functional skills should also be considered when tutors devise their own activities. Students will have additional opportunities to further research, discuss and present information relating to the topics they have been studying within the curriculum resource. Applied Functional Skills Examples In addition to the opportunities integrated within the structure of the curriculum resource, some specific examples of applied functional skills have been identified as follows. In several assignments students follow fault diagnostic procedures to determine faults with electronic circuits. They use a multimeter to read voltage, current and resistance measurements and use an oscilloscope to observe waveforms. They extract and interpret reference data from charts and diagrams. Assignment LED Lamp Circuit: Students work with resistors to read their colour code values and determine their tolerances. They also evaluate measured results, working with multipliers and sub-multipliers for large and small values. Assignment 8 Intruder Alarm: Students compare the results of simulation and real circuit testing. Assignment 0 Flashing Doorbell Circuit: Students produce a written description of the function and operation of a flashing doorbell circuit, explaining the function of each component. They also calculate the frequency of a square wave generator for given component values. Assignment Building Circuits on PCB Continuity Tester: Students calculate total resistance, current, resistor voltage and total power for a potential divider. Assignment Lift Door Controller: Students calculate the on time of time delay circuit for given component values. Assignment AC to DC Conversion: Students calculate the fuse rating required for an AC mains appliance. Assignment 4 Baby Alarm: Students calculate the voltage gain for an operational amplifier Curriculum Content This section lists the detailed content of each assignment and its distinct learning activities. The list can be used to select the work appropriate to the centre devised schemes of work. The grid highlights the nature of the material, its intended outcomes and nominal times for activity completion. Diploma Resource Guide (Electronic Circuits Engineering) P7487a 4

5 Lamp Circuit Lamp Circuit Lamp Circuit Lamp Circuit 4 Lamp Circuit Lamp Circuit 6 Polarity Tester Polarity Tester Circuit Principles (Presentation) Electrical and Electronic Circuits / EMF / Circuits / Components / Potential Difference / Resistance / Current / Short Circuit / Open Circuit The Lamp Circuit (Presentation) Battery / Switch / Lamp / Circuit Explanation / Testing Procedure / Annotated Circuit Diagram Building and Testing a Simulated Lamp Circuit (Practical) The Basic Electricity simulator is used to construct a circuit containing a lamp, battery and switch. A virtual multimeter is used to measure the voltage, current, resistance and continuity. Building and Testing a Lamp Circuit (Demonstration) The Electronic Circuits patching board is used to construct a circuit containing a lamp, battery and switch. A multimeter is used to measure the voltage, current, resistance and continuity. Testing a Faulty Lamp Circuit (Practical) The Basic Electricity simulator is used to construct a circuit containing a lamp, battery and switch. The circuit is modified to check it with open circuit and a short circuit fault conditions. Protecting the Lamp Circuit with a Fuse (Practical) The Basic Electricity simulator is used to construct a circuit containing a lamp, battery, switch and fuse. A short circuit is applied to the lamp and the fuse action identified. The Polarity Tester (Presentation) Diode / Circuit Explanation / Testing Procedure / Annotated Circuit Diagram Building and Testing a Simulated Polarity Tester (Practical) The Circuit Wizard simulator, or equivalent, is used to construct a diode and lamp Forward and reverse connections to a battery demonstrate the function of the diode. Current and voltage measurements confirm the circuit operation. Identifies fundamental concepts about circuits. Investigates the components and circuit connections of a lamp Constructs a simulated circuit and measures voltage, current, resistance and continuity using a virtual digital multimeter. Constructs a lamp Measures voltage, current, resistance and continuity using a digital multimeter. Constructs and tests a lamp circuit with open circuit and short circuit fault conditions. Constructs a simulated lamp circuit containing a fuse to observe the function of a fuse when a short circuit fault occurs across the lamp. Investigates the components and circuit connections of a battery polarity tester. Constructs a simulated circuit of a battery polarity tester and measures voltage and current for both forward and reverse battery connection. Diploma Resource Guide (Basic Electricity Engineering) P77

6 Polarity Tester Polarity Tester 4 LED Lamp Circuit LED Lamp Circuit LED Lamp Circuit LED Lamp Circuit 4 LED Lamp Circuit LED Lamp Circuit 6 Building and Testing a Polarity Tester (Demonstration) The Electronic Circuits patching board is used to build a diode and lamp Forward and reverse connections to a battery demonstrate the function of the diode. Current and voltage measurements confirm the circuit operation. Testing a Diode (Practical) The diode testing range on a digital multimeter is used to test the forward and reverse bias of a diode. The LED Lamp Circuit (Presentation) White LED Lamp / Series Resistor Current Limit / Circuit Explanation / Testing Procedure / Annotated Circuit Diagram Building and Testing an LED Lamp Circuit (Practical) The Electronic Circuits patching board (or Circuit Wizard simulator) is used to build a white LED lamp The series resistor is doubled to observe the change in LED brightness and the voltage and current measurements are compared. Resistors (Presentation) Resistors Values in Ohms / Types of Fixed Resistors / Large and Small Values - Multipliers and Sub-multiples / Tolerance / Power in a Resistor / Resistor Colour Code Resistor Colour Code (Practical) Students read the colour codes of a various resistors and records them in a table. They measure the resistance using a digital multimeter and compare expected and measured values. Components Catalogue (Research) Students use a physical or online catalogue to locate white red and green LEDs. For each component, they identify its order code, cost and key features to record them in a spreadsheet. Calculating the Resistor Value for an LED Lamp Circuit - Level Only (Research) Students calculate the required resistor value to be connected in series with an LED knowing the supply voltage and the LEDs forward voltage drop. Constructs a battery polarity tester and measures voltage and current for both forward and reverse battery connection. Tests a diode using the diode tester function on a digital multimeter. Investigates a white LED lamp Constructs and tests a white LED lamp circuit and compares LED brightness, voltage and current measurements for a change in series resistor. Identifies properties of resistors. Reads resistor colours codes, measure their resistance and compares expected ad measured values. Uses a catalogue to locate LEDs and identify their order code, cost and key feature. Calculates the required resistor value to be connected in series with an LED. 0 0 Diploma Resource Guide (Basic Electricity Engineering) P77 6

7 4 Automatic Light Circuit 4 Automatic Light Circuit 4 Automatic Light Circuit 4 Automatic Light Circuit 4 4 Automatic Light Circuit Building on Breadboard Automatic Light Circuit Building on Breadboard Automatic Light Circuit Systems and Sub-systems (Presentation) System Diagram / Inputs / Outputs / Processes / Drivers / Signals / Creating Sub-systems The Automatic Light Circuit (Presentation) Scenario / Phototransistor Light Sensor / Driver Transistor / LED Lamp Output / Circuit Explanation / Annotated Circuit Diagram / Fault Finding Building and Testing an Automatic Light Circuit (Practical) The Electronic Circuits patching board (or Circuit Wizard simulator) is used to build and test an automatic light The positions of the phototransistor and resistor in the voltage divider input are reversed to demonstrate the affect on the circuit operation. Testing a Faulty Automatic Light Circuit - Level Only (Demonstration) The Electronic Circuits patching board is used to build and test a faulted automatic light Drawing Component Symbols (Practical) Using the physical components of a breadboard kit, students name and draw the symbol of the phototransistor, resistor, transistor and LED lamp. Breadboarding (Presentation) Temporary Solderless Circuit / Grid of Interconnecting Holes / Component Insertion / Wire Insertion / Circuit Connections / Power Rails Constructing an Automatic Light Circuit on Breadboard (Presentation) Planning Sheet / Reverse Supply Diode Protection / Transistor 0V Connection / Double-check of Polarised Components Connections / Check for Touching Leads Identifies how systems represent electronic circuits. principles in an automatic light Constructs and tests an automatic light circuit and determines the affect of reversing the positions of the phototransistor and resistor in the voltage divider input. Tests and diagnoses a fault with automatic light Names and draws the symbols for a phototransistor, resistor, transistor and LED lamp from their physical form. Identifies the principles of breadboarding. Identifies the planning of a breadboard 0 Building on Breadboard Automatic Light Circuit Planning the Automatic Light Circuit Breadboard Layout (Practical) Students draw their component connections for an automatic light circuit on a breadboard planning sheet. Makes a breadboard layout plan for an automatic light Diploma Resource Guide (Basic Electricity Engineering) P77 7

8 Building on Breadboard Automatic Light Circuit 4 Building the Automatic Light Circuit on Breadboard (Practical) Students follow their breadboard layout plan to build the automatic light Follows a breadboard layout plan to build an automatic light 6 Building on Breadboard Automatic Light Circuit Improved Automatic Light Circuit Testing the Automatic Light Circuit (Practical) Students test the automatic light circuit by comparing actual measured values with expected values given in a table. The Improved Automatic Light Circuit (Presentation) Scenario / System Diagram / Potentiometer / Op-amp Comparator / Circuit Explanation / Testing Procedure / Annotated Circuit Diagram Tests an automatic light circuit by comparing actual measured values with expected values given in a table. principles of an improved automatic light Improved Automatic Light Circuit Improved Automatic Light Circuit Building on Breadboard using Integrated Circuits Building on Breadboard using Integrated Circuits Building and Testing the Improved Automatic Light Circuit (Practical) The Electronic Circuits patching board (or Circuit Wizard simulator) is used to build and test an automatic light circuit that includes a comparator and a potentiometer level control. Testing a Faulty Improved Automatic Light Circuit - Level Only (Demonstration) The Electronic Circuits patching board is used to build and test a faulted automatic light circuit that includes a comparator and a potentiometer level control. The Temperature Warning Circuit (Presentation) Scenario / System Diagram / Circuit Component Identification / Thermistor Temperature Sensor / Circuit Explanation / Testing Procedure / Annotated Circuit Diagram Breadboarding with Integrated Circuits (Presentation) Comparator in an IC Package / Breadboard Centre Divider for ICs / Start with the IC / Pin Numbering Constructs and tests an automatic light circuit that includes a comparator and a potentiometer level control. Tests and diagnoses a fault with an improved automatic light principles of a temperature warning Identifies the planning of a breadboard circuit containing an integrated 7 Building on Breadboard using Integrated Circuits Planning the Freezer Temperature Warning Circuit Breadboard Layout (Practical) Students draw their component connections for a freezer temperature warning circuit on a breadboard planning sheet. Makes a breadboard layout plan for a freezer temperature warning 0 Diploma Resource Guide (Basic Electricity Engineering) P77 8

9 7 7 7 Building on Breadboard using Integrated Circuits Building on Breadboard using Integrated Circuits Building on Breadboard using Integrated Circuits 8 Intruder Alarm 8 Intruder Alarm 8 Intruder Alarm 8 Intruder Alarm 4 8 Intruder Alarm 4 6 Building the Freezer Temperature Warning Circuit on Breadboard (Practical) Students follow their breadboard layout plan to build the freezer temperature warning Testing the Freezer Temperature Warning Circuit (Practical) Students test the freezer temperature warning circuit by comparing actual measured values with expected values given in a table. Components Catalogue - Level Only (Research) Students use a physical or online catalogue to locate a thermistor, comparator IC, potentiometer, transistor, resistor and LED. For each component, they identify its order code, cost and key features to record them in a spreadsheet. The Intruder Alarm (Presentation) Scenario / System Diagram / Push-button Switch / OR Logic Gates / OR Gate as a Latch / Buzzer / Circuit Explanation / Testing Procedure Including Logic Probe /Annotated Circuit Diagram / OR Gate Latch with Reset Simulated OR Gate Buzzer Circuit (Practical) The Circuit Wizard simulator, or equivalent, is used to build and test an OR gate circuit with two switch inputs to turn on a buzzer. The student creates a truth table and save the simulated circuit file. OR Gate Buzzer Circuit (Demonstration) The Electronic Circuits patching board is used to build an OR gate circuit with two switch inputs to turn on a buzzer. The circuit is tested with a logic probe. Simulated Latched Buzzer Circuit (Practical) The Circuit Wizard simulator, or equivalent, is used to retrieve the previously saved simulated circuit, modify it to use a second OR gate as a latch. A switch and resistor arrangement is then added to the latch OR gate to provide reset facility and complete an intruder alarm Building an Intruder Alarm Circuit (Demonstration) The Electronic Circuits patching board is used to build the modified latched buzzer circuit that now functions as an intruder alarm with a reset facility. A logic probe is used to test the Follows a breadboard layout plan to build a freezer temperature warning Tests a freezer temperature warning circuit by comparing actual measured values with expected values given in a table. Uses a catalogue to locate a thermistor, comparator IC, potentiometer, transistor, resistor and LED and identify their order code, cost and key feature. principles in an intruder alarm Constructs and saves a simulated circuit of an OR gate buzzer and produces a truth table to show its function. Constructs an OR gate buzzer circuit and tests it using a logic probe. Retrieves a saved simulation file of an OR gate buzzer circuit and modifies it to include a second OR gate configured as a resettable latch. Constructs an intruder alarm circuit and tests it using a logic probe. 0 Diploma Resource Guide (Basic Electricity Engineering) P77 9

10 8 Intruder Alarm 6 8 Intruder Alarm Building on Stripboard Anti-theft Device Building on Stripboard Anti-theft Device Building on Stripboard Anti-theft Device Building on Stripboard Anti-theft Device Building on Stripboard Anti-theft Device Building on Stripboard Anti-theft Device 0 Flashing Doorbell 4 6 Simulation Versus Real Circuit Testing - Level Only (Research) Compares the results of simulation and real circuit testing of previous activities, stating the advantages and disadvantages of each. Circuit Diagram Sketch of an Intruder Alarm Level Only (Research) Students are given a physical connection diagram of an intruder alarm and have to sketch its circuit diagram. The Anti-theft Device (Presentation) Scenario / System Diagram / Tilt Switch / Circuit Explanation / Testing Procedure / Annotated Circuit Diagram Building Circuits on Stripboard (Presentation) Permanent Circuits / Soldered Components / Safe Working Practices / H&S Issues with Soldering / Use of Third Hand / Stripboard Characteristics / Mounting Components / Cutting Tool Planning Stripboard Circuits (Presentation) Planning Essentials / Planning Sheet / ICs / Components Without Suitable Legs / Track Breaks / 0V and Power Track Allocation / Wire Links / External Components / Protection Diode / Unused Tracks / Test Point Pins / What Makes a Good Design Planning the Anti-theft Device Stripboard Layout (Practical) Students draw their component connections for an anti-theft device circuit on a stripboard planning sheet. Building the Anti-theft Device on Stripboard (Practical) Students follow their stripboard layout plan to build the anti-theft device Testing the Anti-theft Device Circuit (Practical) Students test the anti-theft device circuit by comparing actual measured values with expected values given in a table. The Flashing Doorbell (Presentation) Scenario / System Diagram / r IC (astable) / Capacitors / SPDT Switch / Circuit Explanation / Testing Procedure (Including Oscilloscope) / Annotated Circuit Diagram Compares the results of simulation and real circuit testing. Sketches the circuit diagram of an intruder alarm by following its physical connection. principles of an anti-theft device Identifies the principles of stripboarding Identifies the planning of a stripboard Makes a stripboard layout plan for an anti-theft device Follows a stripboard layout plan to build an anti-theft device Tests an anti-theft device circuit by comparing actual measured values with expected values given in a table. principles of a flashing doorbell 0 0 Diploma Resource Guide (Basic Electricity Engineering) P77 0

11 0 Flashing Doorbell 0 Flashing Doorbell Building a Flashing Doorbell Circuit (Practical) The Electronic Circuits patching board (or Circuit Wizard simulator) is used to build and test a square wave generator to flash a white LED lamp. The circuit is then modified to include a pushbutton switch to form a flashing doorbell Students measure and record 6 input/output signals. The capacitor value is changed and its effect observed. Flashing Doorbell Explained - Level Only (Research) Students produce a written description of the function and operation of the flashing doorbell circuit, explaining the function of each component. Constructs and tests a flashing doorbell Describes the function and operation of a flashing doorbell circuit, explaining the function of each component. 0 Flashing Doorbell 4 Calculating Astable Frequency - Level Only (Research) Students calculate the astable frequency for given component values. Calculates astable frequency for given component values. 0 0 Flashing Doorbell Building Circuits on PCB Continuity Tester Building Circuits on PCB Continuity Tester Building Circuits on PCB Continuity Tester Building Circuits on PCB Continuity Tester 4 Testing a Faulty Flashing Doorbell Circuit - Level Only (Demonstration) The Electronic Circuits patching board is used to build and test a faulted flashing doorbell Test equipment is used and measurements compared with expected working circuit voltage, current and input/output waveforms. The Continuity Tester (Presentation) Scenario / System Diagram / Potential Dividers / Circuit Explanation / Testing Procedure (Including Oscilloscope) / Annotated Circuit Diagram Building Circuits on PCB (Presentation) Optimum Solution for a Permanent Soldered Circuit / Prepared PCBs / Preparing PCBs from Simulation Software / Designing and Making PCBs Without Using Software / Enclosure Determines PCB Shape / Copper Tracks / Component Layout / External Components / Protection Diode Building the Continuity Tester on PCB (Presentation) Mounting Components / Soldering Use of Third Hand / Test Point Pins / Cutting Component Legs / Safe Working Practices Constructing the Continuity Tester on PCB (Practical) Students follow a PCB layout plan to build the continuity tester Tests and diagnoses a fault with a flashing doorbell principles of a continuity tester Identifies the principles of PCBs. Identifies the planning of a PCB Follows a PCB layout plan to build an continuity tester 0 Diploma Resource Guide (Basic Electricity Engineering) P77

12 Building Circuits on PCB Continuity Tester Building Circuits on PCB Continuity Tester Lift Door Controller Lift Door Controller Lift Door Controller Lift Door Controller 4 AC to DC Converter (Edexcel Level Only) 6 Testing the Continuity Tester Circuit (Practical) Students test the continuity tester circuit by comparing actual measured values with expected values given in a table. Calculating Potential Divider Values - Level Only (Research) Students calculate total resistance, current, voltage across each resistor and total power drawn in a given a sample potential divider The Lift Door Controller (Presentation) Scenario / System Diagram / AND Gate / Inverter / IC Delay (monostable) / Changeover Relay / Circuit Explanation / Testing Procedure / Annotated Circuit Diagram Building a Lift Door Controller (Practical) The Electronic Circuits patching board (or Circuit Wizard simulator) is used to build a circuit that turns on a buzzer (representing a door) for seconds after a switch is released. A relay controls both the buzzer and a 'door closed' indicator. The circuit is modified with a inverter to activate the second time delay monostable when the switch is pressed, not released. The circuit is modified further to include a microswitch interlock and an AND gate to prevent the door opening when the lift is between floors. The final circuit is tested by measuring voltage, supply current and input/output waveforms. Testing a Faulty Lift Door Controller - Level Only (Demonstration) The Electronic Circuits patching board is used to build and test a faulted lift door controller. Test equipment is used and measurements compared with expected working circuit voltage, current and input/output waveforms. Calculating Monostable Delay - Level Only (Research) Students calculate the monostable time delay for given component values. AC to DC Conversion (Presentation) Alternating Current / Safety Issues / Transformers / Rectification and Smoothing / Power Supply Regulation / Calculating Fuse Rating Tests a continuity tester circuit by comparing actual measured values with expected values given in a table. Calculates total resistance, current, voltage across each resistor and total power drawn in a given a sample potential divider principles of a lift door controller. Constructs and tests a lift door controller. Tests and diagnoses a fault with a lift door controller. Calculates monostable time delay for given component values. principles of AC to DC conversion Diploma Resource Guide (Basic Electricity Engineering) P77

13 AC to DC Converter (Edexcel Level Only) AC to DC Converter (Edexcel Level Only) The AC to DC Converter (Presentation) Scenario / System Diagram / Diode / Smoothing Capacitor / Circuit Explanation / Testing Procedure / Annotated Circuit Diagram Building an AC to DC Converter (Practical) The Electronic Circuits patching board (or Circuit Wizard simulator) is used to build and test a rectifier circuit that converts an AC sinewave voltage to a half wave rectified sinewave voltage. A smoothing capacitor is added to produce a DC level. The capacitor value is changed to see its affect. principles of an AC to DC converter Constructs and tests an AC to DC converter. AC to DC Converter (Edexcel Level Only) 4 Calculating Fuse Rating (Research) Students calculate the fuse rating for an AC appliance. Calculates fuse rating for an AC appliance Baby Alarm (Edexcel Level Only) Baby Alarm (Edexcel Level Only) Baby Alarm (Edexcel Level Only) Baby Alarm (Edexcel Level Only) Baby Alarm (Edexcel Level Only) Road Crossing Controller (AQA Only) 4 The Baby Alarm (Presentation) Scenario / System Diagram / Microphone Operational Amplifier / Voltage Gain / Audio Amplifier / Headphones / Circuit Explanation / Testing Procedure / Annotated Circuit diagram Building an Audio Amplifier (Practical) The Electronic Circuits patching board (or Circuit Wizard simulator) is used to build an audio amplifier and test by applying a sinewave to the input. Building the Baby Alarm (Demonstration) The Electronic Circuits patching board is used to build a baby alarm Students identify that there is insufficient voltage from the microphone input so an operational is added. Testing a Faulty Baby Alarm (Demonstration) The Electronic Circuits patching board is used to build and test a faulted baby alarm Test equipment is used and measurements compared with expected working circuit voltage, current and input/output waveforms. Calculating Voltage Gain for an Operational Amplifier Circuit (Research) Students calculate the voltage gain of an operational amplifier configured a an inverting voltage amplifier. The Road Crossing Controller (Presentation) Scenario / PIC Microcontroller / Flowchart Control principles of a baby alarm. Constructs and tests an audio amplifier Constructs and tests a baby alarm Tests and diagnoses a fault with a baby alarm Calculates the voltage gain of an operational amplifier configured as an inverting voltage amplifier. principles of a PIC microcontroller. 0 0 Diploma Resource Guide (Basic Electricity Engineering) P77

14 Road Crossing Controller (AQA Only) Road Crossing Controller (AQA Only) Road Crossing Controller (AQA Only) 4 Building a Road Crossing PIC Controller (Demonstration) The Electronic Circuits patching board is used to build a road crossing controller. Student use a pre-programmed PIC microcontroller and test the operation against a flowchart. PIC Programming Process (Research) Students research a factsheet and describe the processes followed to programme a PIC. Advantages and Disadvantages of Programmable Devices (Research) Students research a factsheet and state the advantages and disadvantages of programmable devices. Constructs and tests a PIC microcontroller circuit that is programmed as a road crossing controller. Describes the programming process for a PIC microcontroller. States the advantages and disadvantages of programmable devices. Diploma Resource Guide (Basic Electricity Engineering) P77 4

15 Unit Assessment This section lists the detailed content in the assignment for unit assessment. The grid highlights the nature of the material, its intended outcomes and nominal times for activity completion. Assignment Assignment Title Activity Activity Description Learning Objectives Module Review - Unit Assessment (Edexcel Level ) Module Review - Unit Assessment (Edexcel Level ) Module Review - Unit Assessment (Edexcel Level ) Task - Identify Electronic Components. Identify six components from their symbols in a given circuit diagram.. Draw the symbols for 4 components in a breadboard component set.. Use a catalogue to find the component, order code, cost and key feature of a further components in the component set. Task - Produce an Electronic Circuit Diagram Using Standard Circuit Symbols. Sketch the circuit diagram from the layout diagram of a security alarm. Use Circuit Wizard simulator, or equivalent, to reproduce the sketch of the circuit diagram and save the. Retrieve the saved circuit, modify it according to a given modified sketch and save under a new file. Task -Plan, Construct and Test an Electronic Circuit. Team plans how a car headlight reminder circuit can be produced on breadboard. Record decisions and make a written record of plan. Individually produce the circuit on breadboard.. Repeat the build process using stripboard.. Construct the circuit on a pre-made PCB..4 Measure and record 6 input/output signals of a given simulator version of the. Use the circuit constructed on either breadboard, stripboard or PCB, select the test equipment, measure and record 6 input/output signals..6 Compare the results of simulation and real circuit testing. State advantages & disadvantages of each. Identifies electronic components. Produces an electronic circuit diagram using standard circuit symbols. Plans, constructs and tests an electronic Diploma Resource Guide (Basic Electricity Engineering) P77

16 6 6 6 Module Review - Unit Assessment (Edexcel Level ) Module Review - Unit Assessment (Edexcel Level ) Module Review - Unit Assessment (Edexcel Level ) Task - Construct an Electronic Circuit and Demonstrate Safe Working Practices. Construct a car headlight reminder circuit on a pre-made PCB.. Follow safe working practices during the construction.. Give a written description of circuit function, explaining function of each component and detailed operation of.4 Determine total resistance, total current, voltage across each resistor and total power drawn of a given potential divider. Calculate fuse required using given data for an AC mains appliance. Task - Recognise and Select Components. Identify different physical components in a breadboard component set.. Select two components from the breadboard component set for use in given circuit diagram.. Select a further two components from the breadboard component set for use in another circuit diagram. Task - Testing and Fault Finding on Electronic Circuits. Measure and record voltage, supply current and input/output signals of a given temperature warning The circuit contains a pulsing sounder, level control and test control.. Locate a fault that has been inserted in the temperature warning circuit using test equipment and expected voltage, current and waveforms for working. Locate a second fault that has been inserted in the temperature warning Constructs an electronic circuit and demonstrates safe working practices. Recognises and selects components. Tests and fault finds an electronic 4 60 Diploma Resource Guide (Basic Electricity Engineering) P77 6