Download BTEC First Diploma in Engineering Unit 19 Electronic Circuit

BTEC First Diploma in Engineering
Unit 19
Electronic Circuit Construction
Unit Name and Number
Student
Assessor
Task book issue date
Completion date (pass outcomes)
Learner Signature
The following grid gives details of the submission and referral deadlines for each of the pass outcomes listed. The deadline for each outcome will
be indicated in the same box as the outcome criteria.
Outcomes included in this task
book
Tasks are ordered in accordance
with the outcomes listed
P1
Describe the potential hazards
related to constructing
electronic circuits
Deadline:
Module Week 4
P2
Use safe working practices in the
electronics workshop/laboratory
Deadline:
Module Week 4
P3
Describe the purpose of six
different types of electronic
component
Deadline:
Module Week 6
P4
Read a given circuit diagram to
identify the electronic
components in the circuit
Deadline:
Module Week 7
P5
Describe the manufacture of
three types of electronic circuit
board
Deadline:
Module Week 8
Submitted
Achieved?
Referred
Re-submitted
(Date)
(Sign and date)
(Resubmit by?)
(Date)
P6
Use two methods of
construction for a given
electronic circuit
Deadline:
Module week 16
M1
Explain the function and
operation of four different
electronic components
Deadline:
By the end of the module
M2
Explain the advantages and
disadvantages of the three types
of electronic circuit board
Deadline:
By the end of the module
D1
Propose a method used to
construct a given electronic
circuit and justify your choice
Deadline:
By the end of the module
Learner Declaration
I confirm that the work submitted to complete the given tasks is my own. I have indicated where
research and other resources have been used to confirm the conclusions reached within the submission
and listed those resources in a bibliography
Sign and date for each task
P1
P2
P5
P6
P3
P4
M1
M2
D1
Task 1 (P1)
Describe the potential hazards related to constructing electronic Circuits (P1)
Guidance
Consider the three main approaches to constructing electronic circuit boards and describe the main
hazards associated with them. Your evidence should include the following areas:
1.
2.
3.
4.
5.
Sharp edged hand tools
Cuts and abrasions
Swarf from cutting component leads
Soldering irons (burns and fumes)
Toxic substances such as lead in solder
6. Solvents and etching fluids
Task 2 (P2)
Use safe working practices in the electronics workshop/laboratory
This is to certify that the learner:
Demonstrated the safe and correct use of hand tools
Signed Lecturer ………………………………………………… Date ………………………………………………
Used the correct PPE when manufacturing a PCB in the etch bath
Signed Lecturer ………………………………………………… Date ………………………………………………
Used correct PPE when drilling the holes for a PCB
Signed Lecturer ………………………………………………… Date ………………………………………………
Demonstrated the correct procedure for the treatment of a victim of electric shock
Signed Lecturer ………………………………………………… Date ………………………………………………
Correctly wired a mains plug and selected the correct fuse for a given application
Signed Lecturer ………………………………………………… Date ………………………………………………
In addition to the witness statement above the learner must:
Describe the problems which can occur if a polarity dependant device (battery, electrolytic capacitor) is
connected incorrectly to a circuit.
Calculate the correct fuse for a 1 kW kettle operating on a 240 volts mains supply. You must show your
calculations.
Task 3 (P3 & M1)
Describe the purpose of six different types of electronic component.
Guidance
Your description should include a circuit symbol for each component, the unit of measurement for each
component e.g. (a resistor produces electrical resistance measured in ohms Ω), a selection of the
different varieties of component available e.g. (there are many different types of capacitor) and at least
one typical use for each of the listed components. To distinguish between purpose and function
consider the following.
An LED is connected in series with a resistor in a given circuit.
The purpose of the resistor is to restrict the flow of current in that branch of the circuit
However the function of the resistor is to permit enough current to flow so that the LED gives out
adequate light but not so much current that the LED burns out. Selecting the correct value resistor will
accomplish this task. So while the purpose of a resistor is a fairly universal concept, its function depends
upon the circuit requirements.
Describe the purpose of the following components (P1)
1.
2.
3.
4.
5.
6.
The resistor
The capacitor
The diode
The inductor
The transistor
The transformer or power supply
Choose 4 of the components listed above and explain their function and operation (M2)
Task 4 (P4)
Read the following circuit diagram and identify the components in the circuit. To accomplish this you
should print out the circuit on a separate piece of paper and label each of the different types of
component available (including power supplies and ground).
Task 5 (P5, M2 & D1)
Describe the manufacture of the three types of construction for a given electronic circuit.
Use diagrams and illustrations as an aid to describing how electronic circuits are manufactured using the
following three methods (M1):
1. Bread board construction
2. Strip board construction
3. Printed Circuit Board (PCB) Construction
Explain the advantages and disadvantages of the three types of electronic circuit board construction
(M2)
Given that you are required to build the audio amplifier circuit, propose a preferred method either stripboard, bread-board or PCB, bearing in mind the following criteria: (D1)
1.
2.
3.
4.
5.
6.
7.
Your own experience as an electronic engineer
How often you make mistakes when constructing a circuit board
Your skills in soldering
The cost of replacing components, PCB or strip-board
The time required to build the circuits
The time required to modify the circuit
The reliability of the circuit
Task 6 (P6)
Use two methods of construction for a given electronic circuit.
You are required to build and test the audio amplifier. You are free to choose 2 of the three methods
available. You must provide the following evidence:
1.
2.
3.
4.
One working circuit using either of the two chosen methods
You should provide a plan for each of the circuits
You should complete a risk assessment for one of the two chosen methods
Photographic evidence and a witness statement from the lecturer or trainer demonstrator that
the work belongs to you
This work must be completed by each individual student i.e. you can’t work in teams to accomplish this
task.