Elec 1

Front 1

System synthesis

Back 1

recognise and understand that simple systemsconsist of an input, a process, an output andpossibly feedback;

Front 2

System synthesis

Back 2

analyse and design system diagrams where thelines between subsystems represent the flow ofinformation;

Front 3

System synthesis

Back 3

represent complex systems in terms ofsubsystems;

Front 4

System synthesis

Back 4

recognise that signals may be analogue or digitalin nature, and differentiate between them;

Front 5

System synthesis

Back 5

describe and explain the operation of modernelectronic systems which may make use ofseveral sensors.

Front 6

Voltage (V), current (I), resistance (R),power (P)

Back 6

understand the need for identifying a zero voltpoint in a circuit;

Front 7

Voltage (V), current (I), resistance (R),power (P)

Back 7

define and apply the fact that resistance, R, is theratio of the voltage across a conductor, V, to thecurrent, I, flowing through it,R= V/I

Front 8

Voltage (V), current (I), resistance (R),power (P)

Back 8

calculate the combined resistance of resistorsconnected in series using RT = R1 + R2 + R3 +….

Front 9

Voltage (V), current (I), resistance (R),power (P)

Back 9

select appropriate preferred values for resistorsfrom the E24 series;

Front 10

Voltage (V), current (I), resistance (R),power (P)

Back 10

identify the value of resistors using the colourcode and BS 1852 code;

Front 11

Voltage (V), current (I), resistance (R),power (P)

Back 11

define and apply the fact that power dissipatedin a component is the product of V , the voltageacross a component in a circuit, and I , the currentthrough that component;

Front 12

Voltage (V), current (I), resistance (R), power (P)

Back 12

apply the formula VI, or I 2R, or V2/R to calculatethe power dissipation in a circuit or component.

Front 13

Diodes

Back 13

describe the use of light-emitting diodes (LEDs),silicon diodes and Zener diodes and carry outrelevant calculations;

Front 14

Diodes

Back 14

calculate the value of the series resistor for dccircuits;

Front 15

Diodes

Back 15

sketch I – V characteristics for silicon diodes andZener diodes;

Front 16

Diodes

Back 16

select appropriate silicon diodes and Zener diodesfrom given data sheets;

Front 17

Diodes

Back 17

describe how a Zener diode can be used with acurrent limiting resistor to form a simple regulatedvoltage supply;

Front 18

Diodes

Back 18

calculate the value and power rating of a suitablecurrent limiting resistor.

Front 19

Resistive input transducers

Back 19

nterpret and use characteristic curves (whichmay use logarith

Front 20

Resistive input transducers

Back 20

describe and explain the use of LDRs, negativetemperature coefficient thermistors, variableresistors and switches in a voltage divider circuitto provide analogue signals;

Front 21

Resistive input transducers

Back 21

calculate suitable values for series resistors for usewith and for protection of LDRs and thermistors;

Front 22

Resistive input transducers

Back 22

carry out calculations on voltage dividersconsisting of resistors and resistive inputtransducers.

Front 23

Transistors and MOSFETs

Back 23

describe the use of an npn junction transistor as aswitch;

Front 24

Transistors and MOSFETs

Back 24

describe the use of an n-channel (enhancementmode) MOSFET as a switch;

Front 25

Transistors and MOSFETs

Back 25

compare the advantages and disadvantages of aMOSFET and a junction transistor when they areboth used as switches.

Front 26

Output Devices

Back 26

describe the use of electromagnetic relays,solenoids, buzzers, motors, and seven-segmentdisplays in a system and understand and explaincircuit protection provided by a diode in parallelwith a relay, solenoid or motor;

Front 27

Output Devices

Back 27

understand and use COM, NO and NC notation.

Front 28

Operational amplifiers (op-amps)

Back 28

recall the characteristics of an ideal op-amp andbe aware how these may be different for a typicalop-amp;

Front 29

Operational amplifiers (op-amps)

Back 29

know, understand and use the difference betweeninverting and non-inverting inputs;

Front 30

Operational amplifiers (op-amps)

Back 30

understand the power supply requirements andoutput voltage swing limitations of real op-ampsleading to saturation;

Front 31

Operational amplifiers (op-amps)

Back 31

describe, understand and explain the use of anop-amp in a comparator circuit.

Front 32

Logic gates and Boolean algebra

Back 32

• identify and use NOT, AND, OR, NAND, NOR andEX-OR gates in circuits;

Front 33

Logic gates and Boolean algebra

Back 33

construct, recognise and use truth tables for NOT,AND, OR, NAND, NOR and EX-OR gates andsimple combinations of them;

Front 34

Logic gates and Boolean algebra

Back 34

understand the operation of, and usecombinations of, NOT, AND, OR, NAND, NORand EX-OR gates to form other logic functions;

Front 35

Logic gates and Boolean algebra

Back 35

generate the Boolean expression from a truthtable or logic diagram.

Front 36

Design and simplification ofcombinational logic systems

Back 36

design a logic system from a truth table, writtendescription or Boolean algebra expression usingcombinations of gates;

Front 37

Design and simplification ofcombinational logic systems

Back 37

simplify a logic system using either Booleanalgebra or Karnaugh maps;

Front 38

Design and simplification ofcombinational logic systems

Back 38

convert logic systems comprising mixed gatesinto either NOR or NAND gates only;

Front 39

Design and simplification ofcombinational logic systems

Back 39

describe and explain the operation ofcombinational logic systems.