In this article, I have explained about prepare for the electronic laboratory practical examinations and essentials to be considered before attending the examination. Step by step description makes the reader to understand the preparation flow for the electronics lab practical examination well
In electronics subject, students are generally finding it easier reading a particular topic theoretically and write it in examination well. But considering their practical examinations, students may find it difficult to implement a particular concept practically due to their less practice or less concept understandability or lack of equipment handling experience.
First step: Make the concept clear
It is the must factor for everyone to understand the concepts well for the practical examinations. Here the concepts in the sense, the experiment's function which are considered to be studied for the examination
In electronics laboratory, there are some important sections need to be more concentrated and explained as below
Block diagram of the experiment
For every experiment, it is an initiative process to show the concept overview of the experiment implementation
First make sure the block diagram of the model is very clean and understandable.
Don't repeat the same blocks, instead use the blocks for indicating operations from left to right sequentially
Make sure each block has its unique feature to specify in a short and technical term
Circuit diagram of the experiment
Circuit diagram shows the real implementation of components to form an experiment
Note that a minor error making in the circuit diagram may give bad result or response for the implementing experiment
First understand the function of each and every component and all the other sources for all the experiments,it is very essential
Practice the circuit diagram of every experiment before going to attend an examination
The first look for the practical examination on electronic laboratory is by the circuit diagram, it shows how well you understand the experiment
DO's and DONT's
Before implementing any experiment practically you must know the DO's and DONT's in order to prevent yourself and to gain the expected results
Most of the time a minor error like interchanging the positive and negative terminal of a source can damage the whole circuit, so be aware to make sure your circuit is correctly executed
Sometime even-though your circuit has constructed good, the other sources like CRO, power supply can damage it. So, before connecting any external source check its function and do
Some components can't withstand the overflow of the electrical consumption, so know the limit and use it properly. e.g) a resistor can be burst if more current draws in it
Practice yourself how to prevent yourself from the experiment is necessary. Sometime high voltage circuit implementation can hurt you when direct contact. So, be aware and use proper insulation requirements
Procedural and Theoretical overview
In most of the electronic laboratory practical examination, you will be expected to write the procedure and theoretical overview of the experiment you are asked to undertake. So, a step by step procedure and the knowledge on the experiment can be written in your own style instead of writing a big big paragraphs
Procedure should comprise the execution of the experiment from start (Circuit implementation) to the end(Graphical representation) sequentially
During theoretical write, specify the functions of each block clearly and mention how the experiment starts functioning and how every component and source acts in the circuit
Tabular Columns
After constructing a circuit for the experiment, measuring the characteristics in a proper manner is essential
e.g) For measuring characteristics of a diode, the tabular column should comprise the necessary parameter that you have traced like current, voltage and temperature within particular range
Measurement results may be deviating from the theoretical values that you expected but the actual values you have got should be the input for your tabulation, don't correct the results that you got
Show the parameter units clearly and let the tabulation looks neet and accessible to the examiner
Graphical Representation
It is the actual representation of the measured results observed by the experiment. So, the real output or outcome of your experiment in the practical examination is observed here
You should handle the observations or values that you have received from the experiment in a proper manner to show the representation in a correct style, i.e) Your output graph should show the exact replica of the theoretical expectation. Sometime little deviation can happen, do ignore it because the practical limitations can deviate the actual result a bit
Some Important Tips
While doing practice at lab, know the function of all the components and do some innovative practices which will not let you struggle in some bad situations when you come across during examination
Distinct representation is always appreciable, your representation should show that you have well understood the experiment
