prototype construction

8/2/2019 Prototype Construction

http://slidepdf.com/reader/full/prototype-construction 1/6

Prototype construction

After all the detailed analysis of the desired output of the project has been obtain

and after the design has been completed and analyzed based on the technical

specification of the different components to form the prototype, the proponents

bought all the required components, materials and supplies in Manila in able to start

the prototype construction.

First, the proponents start the layout for the power supply circuit, high powered

control circuit, low powered control circuit as well as the alarm circuit in the PCB.

After the layout, the etching follows with the use of the mixture of hydrogen peroxide

and muriatic acid. After the etching of the PCB, putting and soldering all electronic

components in the PCB follows. Checking the placement and proper soldering of the

components is needed in able for the circuit to function hence. Using different

electronic equipment such as multi-tester can also be used inable to test the circuit

functionality. After all the components have been placed and after all the components

are tested, all circuits are case in the fiber glass casing to make it more presentable.

After this, the construction f the miniature for two rooms is established by using

plywood and other constructing tools. Placing and wiring all circuit in order for the

system to function. After this, Adding LED, switch, 220V outlet and installing the

electronically controlled locked on the room miniature follows.

After all the components have been placed, and after all the necessary procedures

have been taken, the proponents interfaced the prototype to the PC where the program

is saved. Connecting the Barcode and Biometric in the PC to test the functionality of

the whole system follows. After the proponents tested and conclude that the prototype

is already functioning, Lastly, the testing and evaluation with corresponding surveys

and questionnaires have been done in the College of Engineering and Technical



Department with the target respondents to determine the functionality of the

prototype.

Testing and Validation

After the prototype has been constructed, the proponents conducted series of testing

and trial to measure its performance and functionality.

First Trial

The proponents test the low and high powered circuitry to test its functionality by using

12Vdc power supply, but it didn’t function.

Solution

Re-soldering and placing each of the components are conducted so that it will function

as expected. Checking every component in the PCB is really necessary to assure its

functionality.

Second Trial

The proponents interfaced the PC Program to the control circuit using the RS232

interface, but it didn’t response.

Solution

Checking the wiring connection of the RS232 DB25 to DB9 and the proponents find

out that it has a misconnection, therefore re-wiring of the data interface was conducted

to assure its functionality.

Third Trial

At first, the proponents used only one power supply to the whole system, excluding the

computer unit, but the electronically controlled lock didn’t function.



Solution

The proponents started checking the wiring connection but they conclude that the

connection was right. After this, they checked the supply voltage, they found out that

the power supply can’t provide the necessary voltage and current needed by the

electronically controlled lock so therefore the proponents design and construct another

two power supply for the lock.

The following trials were made but the researchers didn’t encounter any

problems or errors anymore.



The proponents also conducted an evaluation for students to determine if the

study met its objectives .The proponents use five-point Likert scale to identify

respondent‘s level of agreement with criteria which will determine the over-all

performance of the prototype. The respondents evaluated the prototype from 5 =

Excellent, 4 = Very Satisfactory, 3 = Satisfactory, 2 = Unsatisfactory, 1 = Very

Unsatisfactory. Using the tables, the results of the evaluation were interpreted and

illustrated. In tabulating the data, the researchers used averages as well as the

weighted mean to determine the functionality of the prototype.

CRITERIA Specific prototype features 5 4 3 2 1

Performance Effectiveness

Able to perform all required tasks:

Control of the lights

Control of the outlet

Control of the door’s lock

Working Alarm System

Performance Efficiency

Fast respond time

Efficient Input

Efficient output

Ease of use

Satisfactory user interface

Helps menus available

Flexible interface

Adequate feedback

Flexibility

Options for input

Options for output

Table 4.3 Survey Questionnaire with Five-point Likert Scale



The Table 4.3 show the sample survey with corresponding criteria and five-point

Lickert scale.

Respondents

Performance and

effectiveness

Performance

Efficiecy

Ease Of

Use

Flexibility

ControloftheLig

hts

ControlOfTheOu

tlet

ControlOftheDo

or's

WorkingAlarmSystem

FastRespondTim

e

Efficientinput

EfficientOutpu

t

SatisfactoryUse

r

HelpMenusAvailable

FlexibleInterfac

e

AdequateFeedba

ck

Optionsforinpu

t

Optionsforoutput

1 5 5 5 5 4 4 4 5 5 5 5 4 4

2 5 5 5 4 5 5 5 5 5 5 5 5 5

3 5 5 5 5 5 5 5 4 5 5 4 5 5

4 5 5 5 5 5 5 5 5 5 5 5 5 5

5 5 5 5 5 5 5 5 5 5 5 5 5 5

6 5 5 3 5 5 5 5 5 5 5 5 5 5

7 5 5 5 5 5 5 5 5 5 5 5 5 5

8 5 5 5 5 5 5 5 5 5 5 5 5 5

9 5 5 5 5 4 5 5 4 4 5 5 5 5

10 5 4 5 5 5 5 5 5 4 5 5 5 5

11 5 5 3 5 5 5 5 5 5 5 4 5 5

12 5 5 5 4 5 5 5 5 5 5 5 5 5

13 5 5 4 4 5 4 5 5 4 4 5 5 5

14 5 5 5 5 4 5 5 5 4 4 5 4 5

15 4 5 5 5 4 5 4 5 4 5 4 5 4



16 5 5 4 5 5 4 5 5 4 4 5 4 5

17 5 5 5 5 5 5 5 5 5 5 5 4 4

18 5 5 5 5 3 4 4 4 5 5 4 5 5

19 5 5 5 4 5 5 5 5 5 5 5 5 5

20 5 5 5 5 5 4 4 5 5 4 4 5 5

21 5 5 5 5 5 5 5 5 5 5 5 5 5

22 4 4 4 4 3 3 3 4 3 4 4 3 4

23 5 5 5 5 4 4 4 4 4 4 5 4 4

24 5 4 4 5 5 5 5 5 5 5 5 5 5

25 5 4 5 5 4 4 4 4 4 4 5 5 5

Average

4.92 4.84 4.68 4.8 4.6 4.64 4.68 4.76 4.6 4.72 4.76 4.72 4.8

A

veragefor

eac

hCriterion

4.81 4.64 4.71 4.76

Remark

4.732308

Table 4.4: Survey on the Performance Effectiveness and Efficiency, Ease of Use and

Flexibility of the Prototype

The result was translated by computing the mean. There were twenty(25) respondents

that randomly selected male and female 3rd year to 4th year students which belongs to

of the College of Engineering and Technical Department.

prototype construction

Documents