A Simple, Cheap and Precise Microcontroller Based DDS Function Generator

In electronics design and troubleshooting, the function generator is an important and versatile electronic test equipment. But the prices of finished function generator sold on market is expensive and not everyone can afford it. In order to create an economic and reliable function generator, microcontroller-based DDS function generator designed. AD9833 is DDS based programmable function generator from Analog Devices, which capable to producing sine, triangular and square wave output. To make an easy to use and flexible function generator, AD9833 connected with 4x4 matrix membrane keypad and LCD 1602. The microcontroller-based DDS function generator successfully created. The waveform generated by AD9833 offers not only exceptional accuracy and stability, but also low phase noise, an excellent frequency change and sudden waveform change ability, its useful in a wide variety of testing applications.

Convolution Integral: How a Graphical Type of Solution Can Help Minimize Misconceptions

A physical system, Low Pass Filter (LPF) RC Circuit, which serves as an impulse response and a square wave input signal are utilized to derive the continuous time convolution (convolution integrals). How to set up the limits of integration correctly and how the excitation source convolves with the impulse response are explained using a graphical type of solution. This in turn, help minimize the students’ misconceptions about the convolution integral. Further, the effect of varying the circuit elements on the shape of the convolution output plot is presented allowing students to see the connection between a convolution integral and a physical system. PSpice simulation and experiment results are incorporated and are compared with those of the analytical solution associated with the convolution integral.

Robotic Arm Using Servo Motor and Arduino Uno Controlled with Potentiometer

Robotic arm has been widely used in many applications, especially in industry. With this kind of advancement, the needs to introduce this technology to students at early age has increased. However, many students still consider this kind of technology as something out of reach. This project aims to create a very simple robotic arm using servo motor and materials which can be easily obtained around the household. The resulting robot is also programmable and electronically movable, thus enabling more freedom of how to move it. This in turn create a good introductory tool for the students to learn about the structure and motion of robotic arm.

Door Security System Using e-KTP RFID Reading and Passive Infrared Sensor

A door, as a barrier to limit an access between two spaces, requires a security measure to ensure that only privileged people may pass. In this paper, a door security system using Radio Frequency Identification (RFID) and Passive Infrared (PIR) sensor is proposed. This security system utilizes an electric door lock and an e-KTP (Kartu Tanda Penduduk elektronik/ electronic Indonesian Identity Card) as the key. A sequence of numbers can be read from an e KTP by using an RFID reader. This sequence is unique, making an e-KTP suitable to be used as a key. Furthermore, the door security system is equipped with an alarm. A PIR is used to detect motion, and the alarm will sound if someone passes the door while the alarm is still in active state. The Arduino Mega microcontroller board is used to organize the whole system, consisting the aforementioned reader and sensor, along with two push-buttons, a buzzer, and a solenoid door lock. The system is realized into a prototype in the form of door miniature. A list of scenarios is played through to the system. Only authorized e-KTPs can be used to unlock the door and deactivate the alarm. The door security system successfully fulfils the objective to improve the security level of a door lock mechanism by utilizing an e-KTP as a unique RFID key and by featuring a PIR-integrated alarm.

Mengganti Mikrokontroller Mesin Dust Collector pada PT. xxx dengan PLC OMRON CP1E-NA20CD-R

As a result of the production of powder processing causes a lot of dust around the production machine and factory. This of course can cause pollution. Dust needs to be collected using a Dust Collector (DC) machine. The controller on the DC machine at PT. xxx is often damaged in the control unit and requires repairs at a cost of around Rp. 5,000,000 per unit. In facts there are about 10 units of machines at PT.xxx that must work all. Because of DC machines are often damaged in their controllers, the maintenance department made a development to make replacement DC machine controllers. Namely using the Programmable Logic Controller (PLC). This PLC replaces the microcontroller unit on the DC machine, PLC uses ladder diagram programming language that is easily understood by some people working in the world of control. PLC parts that are easily found in the market and programming languages that are easy to understand and reliability make one of the reasons this PLC is used to replace the microcontroller unit.

Perancangan Detektor Kebocoran Gas LPG Berbasis Arduino yang Terhubung dengan Smartphone

LPG (Liquefied Petroleum Gas) has become the fuel for cooking for most households in Indonesia. The use of LPG for cooking requires high level of caution, due to the danger that may arise from gas leakage. If the molecules of flammable LPG gas are present in the air at a certain concentration and there is a triggerring factor in the form of flame or sparks, explosion and fire may occur. To prevent disasters caused by a LPG gas leakage, the author proposed an Arduino-based LPG gas leak detector (GLD). The GLD is equipped with a MQ-2 gas sensor, capable of measuring the LPG concentration in air in units of parts per million (ppm). Based on the measurement result, the GLD provides an early warning of LPG leakage through 3 condition levels: Normal, Alert, and Danger. Each condition level is characterized by the activation of LED indicators, a miniature air circulation fan , and a buzzer. Alert warning is released when the sensor reads more than 400 ppm (2.05% of LPG Lower Explosive Level). Danger warning is given at 800 ppm (4.10% of LPG Lower Explosive Level) or higher reading. An HC-06 Bluetooth module creates a wireless connection between the GLD and a smartphone. Through an application created on Blynk platform, the smartphone can monitor the LPG concentration at a distance of 10 m from the GLD. The GLD is tested and succeeded to detect gases coming from an LPG cylinder and from a gas lighter. The GLD also runs perfectly for the designed early warning scheme.

Solar Panel Measurement System using Arduino with Bluetooth

This project aims to develop a measurement of solar energy using Arduino. In this research, two parameters that been measured are light intensity and the voltage. The light intensity was measured using light dependent resistor (LDR) sensor. The voltage was measured using the voltage divider because the voltage generated by the solar panel are large for the Arduino as receiver. These parameters as the input value for the Arduino and the output was display at the Arduino Bluetooth Controller. The Arduino Bluetooth controller display output of the light intensity and the voltage value. The purpose of using Arduino is to convert the analog input of parameter to the digital output and display via Bluetooth .

Design and Implementation of Electricity Fault Detection System Using Microcontroller Arduino UNO

This paper concentrates of creating a fault detection system that detect both emergency fault and fault that need of maintenance with prototype of electrical installation that is done through manual simulation method. The prototype consists of the lamp as the load integrated with Arduino UNO as the microcontroller with GSM module and buzzer. The microcontroller will detect and deduce the type of the fault happened in the installation and will send the data of the fault through the GSM module. GSM module then transmits the data to the mobile phone and let the user aware of the fault. Also, there will be buzzer as the warning system by producing high pitch sound that signalizes the fault that need immediate handling or emergency. The data of both faults will be sent as Short Message Service (SMS) to the user. The SMS will give the user the type of fault either emergency or need of maintenance, happened in the installation.

Security Home Door Automation Using Multi Sensors

The System is using Smart Relay as main control that is commonly used industrially and commercially as a control system. Using the smart relay can reduce the use of control relay and writing of the system significantly. The smart relay has a GSM-SMS for messaging and controlling the system. Only the listed number at the system that can message and control the system. By using smart relay, we can costumized our design as our requirements. Automatic door is commonly used in commercial and industrial. The relay output will be connected to door motor (for opening and closing), buzzer for alarm and pilot lamps for indication. Finaly the system is expected to have several functions as follow : Automatic opening door using fingerprint detection, automatic opening door using GSM command, automatic opening door using push button for inside command, automatic opening door using passcode, automatic closing door after door is fully opened with no movement and send the notification by GSM. By Implementing this system, it will be easier to lock the door and activate the alarm from a considerable distance.

Perancangan Alat Pencegah Kebakaran Rumah Akibat Kelalaian Manusia Mematikan Kompor Gas Berbasis Mikrokontroler Arduino yang Terintegrasi dengan Smartphone

Many know that the activities of most people who are at home certainly cannot be kept away from the name of cooking with gas stoves. But it was a concern because of the many cases that occurred related to gas stoves. Often from most people when cooking they forget to turn off the stove because of other activities or even leave. This can lead to potential house fires. To overcome this problem, we need a tool that can detect the condition of the gas stove, in order to prevent undesirable things from happening earlier. To avoid undesirable events due to human negligence turning off the gas stove. So the design of making tools that can determine whether there is activity of moving objects in front of the gas stove. So that if the gas stove is still burning, the gas stove will automatically turn off or be turned off remotely by the homeowner by giving notification to the homeowner's handphone.