Utilization of Intel Galileo Module For Smart System as AC LED Lamp Controller - Politeknik Negeri Padang

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Utilization of Intel Galileo Module For Smart System

as AC LED Lamp Controller

Silfia Rifka

#

, Firdaus

#

# _{Electrical Engineering Department, Poyitechnic State of Padang , Kampus Unand Limau Manis Padang, Indonesia} E-mail: silfiarifka@gmail.com, mrdauz@yahoo.com

Abstract—Intel Galileo is a microcontroller module that adopts the workings of a mini computer. In this smart system, it is used intel galileo module as light emitting diode (LED) controlled system. LED lights are controlled automatically for on and off from the intel galileo based control systems and controlled remotely using android based application that is accessible from smart devices such as smartphone and tablet. Besides using android based application is also able to control the intensity of light or lamp illumination level (dim and bright). To measure the AC LED light intensity is used lux meter and obtained the value of 46 lux the smallest state the dimmest light and the highest value of 596 lux for the brightest light. Measurement of the value of illumination level is necessary because people need different levels of illumination.

Keywords— intel galileo, smart system, LED.

I. INTRODUCTION

The smart system is a system that can control the system automatically and can control the system remotely by utilizing smart devices [1]. The control system used for this smart system is intel galileo module which is a microcontroller module that adopts the workings of mini computer. Smart devices used for the system are smartphones and tablets.

Human needs light or light in life. The level of lighting required is also different and one of the lighting sources is the lamp. In a smart system as a light controller is used light emitting diode (LED) AC. LED lights have advantages such as energy-saving electricity, long lifetime and environmentally friendly [2].

In this LED light control system also used component of opto diac and triac [3] [4]. Alternating current diode (diac) is used to set the triac bias to determine the on and off points. Triode for alternating current (triac) is a component used for alternating current (AC) and in this system is used for switch [3] [4] [5] - [7].

II. THE MATERIAL AND METHODE

This smart system consists of several main components namely intel galileo intel microcontroller, LED AC light, LED light regulator circuit and remote control system.

A. Modul Mikrokontroller Intel Galileo

Intel Galileo is the first intel-based microcontroller module synchronized with the arduino and the Intel Quark SoC X1000 processor [8] [9] [10] - [11]. Intel's galileo diagram as

shown in Fig.1. This intel galileo module is utilized as a system of LED lamp controller in the smart system made.

B. Lampu Light Emitting Diode (LED)

LED is a light emitting diode sustu. This LED device consumes less power than other light devices [2] [12]. LED are widely used in electronic circuits for a long time.

LED available in color are used as indicators on electronic devices[2].

192 The new technology enables white LEDs that are super bright LEDs allowing more light with very low power consumption [2]. Hence now LEDs find its use as a light source. LEDs are also used on television and computer.

C. Diode alternating current (Diac)

Diac is a type of silicon controlled rectifier (SCR) has two terminals. Diac is designed to have a certain breakover voltage, usually 30 V and when a voltage less than this is applied to the second polarity, the device remains in a high resistance state with a leakage current flowing. Small value [3] [4] [5] - [7]. The diac characteristics shown in Fig. 2.

Fig. 2 Diac Characteristics [5]

VBO is the breakover voltage and ΔV is the reduction of

voltage due to current at break. When the diac voltage exceeds 30 volts (breakover voltage) the current flows and the current rise is accompanied by a drop in voltage at Diac [3] [4] [5] - [7]. Normally, Ohm's law states that increasing the current through a component causes an increase in the voltage across that component. However the opposite effect occurs here, therefore Diac shows a negative resistance during breakover.

D. Triode for alternating current (Triac)

Triac is a Silicon Controlled Rectifier (SCR) that works bidirectional. Triac is mainly used in power control to provide full wave control. This allows the voltage to be controlled between zero and full power [3] [4] [5] - [7]. With a simple half-wave thyristor circuit, the controlled voltage can only vary between zero and half forces because the thyristor only performs for one half cycle [5] [6]. Triac provides a wider range of controls in the AC circuitry without the need for additional components. The Triac characteristics are shown in Fig. 3.

Fig. 3 Triac Characteristics [5]

E. Sistem Pengendali Lmpu LED

The smart system created is visible in Fig. 4 consisting of a galileo-based intelligent light control system and an android-based remote control system are shown in Fig. 5.

Fig. 4 Smart Control System LED AC Lights

In the controller system based on microcontroller intel galileo this AC LED lamps are automatically controlled for on and off depending on the number of people entering and exiting the room. If a person goes first into the room, the lights go on automatically, and the system will calculate the up-counter how many people into the room and otherwise count down-counters the number of people out to determine lights off automatically.

193 controlled for setting the dim light intensity and brightness through the "+" and "-" buttons on the application. When the light is at the same intensity of maximum value, the microcontroller pin connected to the optodiac will issue a burst (tBurst) burst of 100 μS to trigger the triac during the conduction region so that the waveform present in the lamp is half the negative period and half the period positive. This makes the average voltage of the lamp decreases by half the maximum voltage of the mesh voltage source as shown in Fig. 6. When the "+" button is pressed then the trigger t will be smaller and the waveform on the lamp tends to the full sine waveform. If the "-" button is pressed the enlarged trigger tends to make the waveform smaller on each half of the positive and negative periods so that the average voltage of the lamp will also always decrease.

f = 50 Hz

Fig. 6 Waveforms, Trigger Triac and Lights

In the android-based control system, the lights are controlled for setting the dimness of light dim and dim light. The intensity of the resulting light is measured using lux meter application software. Lux meter will read the intensity of the lamp in lux and display the graph of light change detected by lux meter.

III. RESULT AND DISCUSSION

The measurement of trigger t and average voltage (rms) on the lamp is shown in Table I.

TIMEMEASUREMENTRESULT(T)TRIGGERANDVOLTAGE STRESSONLAMP

The intensity of light produced by lux meter is influenced by the surrounding light conditions, so in this experiment, the measurement is done by covering about lux meter and AC LED lamp that is tested to reduce the effect of other light intensity with the perpendicular position between the lamp and the lux meter software available on smart devices are tablets. Then the value that is read in the capture as the value of light intensity when the light is set to change the intensity by controlling from the smart device used is the smartphone.

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a. ON b. 1st “-” button push

c. 2nd “-“ button push d. 3rd “-“ button push

e. 4th “-“ button push f. 5th “-“ button push

195

a. 1st “+” button push b. 2nd “+” button push

c. 3rd “+” button push d. 4th “+” button push

c. 5th “+” button push d. 6th “+” button push

196 In controlling the increase of light intensity, testing is done by pressing the "+" button on the android application interface. The measurements shown in Fig. 8 (a) the value of 52 lux with the 1st pressing of the "+" button, obtained the value 77 lux (Figure 8 (b)) 2nd pressing the "+" button, then obtained 107 lux value (Figure 8 (c )), 3rd pressed "+" button, the 4th "+" button pressed the value of 146 lux (Figure 6 (d)), the 5th pressed the "+" button got 175 lux (Fig 8 (e )), and the 6th pressed the "+" button the value of 232 lux (Figure 8 (e)). From the measurement results obtained that the lighter the intensity of the light will be the greater the intensity value that is obtained on the lux meter.

Graph shown on lux meter, is a graph of light intensity detected in lux meter application software.

TABLEII

RESULTOFLIGHTINTENSITYLIGHTINGLEDLIGHTLAMPUSING LUXMETER addition of light intensity using lux meter. By pressing the "-" and "-"+"-" keys on the android app from 1st press to 8th press.

From the measurement results show that the intensity of light is proportional to the value of lux light, the greater the value of lux that is produced it will be the light of the light issued by the AC LED lights is used.

Fig. 9. Comparison of Light Intensity Value (lux)

In Fig. 9 shows a graph of the comparison of the intensity values of light for the reduction and addition of light intensity based on the measurement results using the lux meter shown in Table II.

IV. CONCLUSIONS

The control of the AC LED lights can be adjusted in the way when the lamplight is at the same intensity of the maximum value, the microcontroller pin connected to the optodiac will issue a burst (tBurst) burst of 100 μS for the trigger triac during the conduction region so that the waveform present in the lamp is half negative period and half the positive period.

The measurement of the change in the intensity of light was performed using a lux meter and the result was that the largest lux was 596 for the brightest light and 46 for the dimmer light.

The greater the value of lux will be the greater the intensity of the light or the lights brighter, and vice versa, if the smaller the value of lux, the smaller the intensity of the light or the lights dimmer.

REFERENCES

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Components and Techniques, USA: O’Reilly Media,

Inc, 2015

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& Ventus Publish Aps, 2010

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