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Elements and Performance Criteria

1. Perform basic electronic calculations
   • Calculations are performed for a given circuit voltage, current, resistance and d.c. power.
   • The period, frequency, RMS, peak and peak-to-peak voltages are calculated for a given repetitive waveform.
   • Waveform calculations are verified using an oscilloscope.
2. Select, test and use simple electronic switching circuits
   • Transistors required for simple switching applications are selected.
   • The circuit is wired up and tested using suitable prototyping equipment.
   • Calculations are verified.
3. Select, test and use simple electronic timing circuits
   • The appropriate timing circuit is selected and the time constant is calculated.
   • The circuit is wired up and tested using suitable prototyping equipment.
   • Calculations are verified.
4. Select common power supplies and power control devices
   • Appropriate rectification is selected.
   • Appropriate power control devices are selected.

Required Skills

Required skills

Look for evidence that confirms skills in using a multimeter to measure ac and dc voltages resistance and capacitance setting an oscillatorsignal generator to a specified frequency and amplitude using an oscilloscope to record wave shapes and to measure the peaktopeak voltage and the period of any repetitive waveform identifying sine waves cosine waves square waves triangular waves and sawtooth waves communicating planning assessing problem solving reading interpreting and following information on written job instructions specifications standard operating procedures and other applicable reference documents undertaking numerical operations geometry and calculationsformulae within the scope of this unit checking for conformance to specifications checking and clarifying task related information

Required knowledge

Look for evidence that confirms knowledge of electronic concepts and units voltage current resistance and capacitance power frequency and period common electronic instruments multimeters power supplies signal generators oscilloscopes timing circuits and oscillators semiconductor devices diodes power zener LEDs transistors linear integrated circuits power control devices triacs SCRs power supplies hazards and control measure associated with selecting and test components for simple electronic switching and timing circuits including housekeeping safe work practices and procedures

Evidence Required

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria required skills and knowledge range statement and the Assessment Guidelines for the Training Package
Overview of assessment	A person who demonstrates competency in this unit must be able to select and test components for simple electronic switching and timing circuits Competency in this unit cannot be claimed until all prerequisites have been satisfied
Critical aspects for assessment and evidence required to demonstrate competency in this unit	Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria including required knowledge and be capable of applying the competency in new and different situations and contexts
Context of and specific resources for assessment	This unit may be assessed on the job off the job or a combination of both on and off the job Where assessment occurs off the job that is the candidate is not in productive work then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team The assessment environment should not disadvantage the candidate This unit could be assessed in conjunction with any other units addressing the safety quality communication materials handling recording and reporting associated with selecting and testing components for simple electronic switching and timing circuits or other units requiring the exercise of the skills and knowledge covered by this unit
Method of assessment	Assessors should gather a range of evidence that is valid sufficient current and authentic Evidence can be gathered through a variety of ways including direct observation supervisors reports project work samples and questioning Questioning techniques should not require language literacy and numeracy skills beyond those required in this unit of competency The candidate must have access to all tools equipment materials and documentation required The candidate must be permitted to refer to any relevant workplace procedures product and manufacturing specifications codes standards manuals and reference materials
Guidance information for assessment

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Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.
Simple electronic switching circuit	Includes simple transistor switches and simple linear integrated circuits
Suitable prototyping equipment	Includes breadboards
Appropriate timing circuit	Includes simple RC timing circuit, type 555 integrated circuit, etc.
Appropriate rectification	May include half or full wave
Power control devices	May include zener diodes and LEDs. SCRs and triacs

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