Kursi Roda Elektrik dengan Kendali Gestur Kepala

A wheelchair is a tool that can be used to mobilize patients who experience paralysis, especially paralysis in the legs, so they can move from one place to another independently. An electric wheelchair is a type of wheelchair that can be controlled by a patient without having to be controlled by another person. The design of this tool utilizes an ADXL335 accelerometer sensor mounted on the patient's head as a determinant of the direction of wheelchair movement, BTS7960 as a DC motor driver, a motor wiper as the main drive for a wheelchair, and the Atmega328P microcontroller as an input and output processor. Gestures of the patient's head (looking down, looking up, head tilted to the right, tilting left) will produce a different voltage output which will be processed by Atmega328P as a determinant of the direction of motion which will be sent to the BTS790 driver to drive the wipper motor as the main driver of the wheelchair. The method of testing and measurement carried out is by testing the response of the ADXL335 accelerometer sensor with the test results of the ADXL335 accelerometer sensor having an accuracy of determining the direction of motion of 100%. The results of testing the average wheelchair speed of 2.3 km / hour with a patient weight of 40-60 kg, and the test results of battery endurance in a wheelchair of 5.07 hours with a patient weight of 40-70 kg with a 12V18Ah battery.

Modified Buck-Boost Converter as DC Motor Driver with ContinuousInput Current

A modified Buck-Boost converter with output filter is treated as a switched mode power supply andas a two quadrant driver for DC machines. The modification is done by changing the position of the capacitorof the Buck-Boost. With this modification the input and the output currents of the converter are steady and themaximum input current is reduced compared to a normal Buck-Boost. The function of the modified converter isexplained with the help of time signals, the large signal and the small signal models are derived, the transferfunctions for the speed are calculated, dimensioning hints are given, and simulations are shown.

Rancang Bangun Prototype Pengering Gabah Otomatis Dengan Pengendali Sensor Kelembaban Dan Suhu Berdasarkan Suhu Ruang Berbasis Mikrokontroler ATmega 328

Intisari — Pada zaman modern banyak produk-produk manufaktur yang serba otomatis untuk membantu manusia dalam mengerjakan pekerjaannya. Salah satu kerja yang membutuhkan bantuan mesin adalah pengering gabah. Pada saat ini pengeringan gabah dilakukan dengan konvensional yaitu dijemur di terik matahari dan bila cuaca mendung maka tidak dilakukan penjemuran. Oleh karena itu dibutuhkan alat yang terintegrasi. Alat pengeringan otomatis ini menggunakan mikrokontroler untuk mengatur kerja blower DC, motor driver L298N, Motor DC pengaduk gabah, Sensor suhu, dan Sensor kelembaban & suhu. Pada alat ini menggunakan gabah dengan massa 0.5 kg, 1 kg, 1.5 kg, 2 kg dan 3 kg waktu pengeringan gabah dengan rata-rata waktu di setiap massa 36, 52.6, 65.8, 73.2, dan 83.2 menit dengan kelembaban dan suhu awal sama yaitu 80% & 26º C dan daya 120 Watt. Hasil dalam Proses selanjutnya yaitu dengan kelembaban awal 40%, 50% dan 60% dengan rata-rata waktu berturut-turut yaitu 34.8, 47.8, dan 63.2 menit. Dan hasil dari proses pengujian terakhir yang dilakukan di pagi hari dengan kelembaban dan suhu awal 89% & 20º C, siang hari dengan kelembaban dan suhu awal 80% dan 26ºC dan sore hari dengan kelembaban dan suhu awal 85% dan 23ºC didapatkan rata-rata waktu berturu-turut yaitu 75, 52.6 dan 63.4 Menit. Kelembaban standar yang telah diatur adalah 32% kelembaban tersebut hampir setara dengan kelembaban gabah yang telah disurvey yaitu 25% di tengah terik matahari dengan suhu 35ºC. Kata kunci — Mikrokontroler, Pengeringan Gabah, Motor DC. Abstract — In modern times many manufacturing products are completely automated to help people in their work. One job that requires the help of a machine is grain dryer. At this time grain drying is done conventionally, which is dried in the sun and when the weather is cloudy, drying is not done. Therefore we need an integrated tool. This automatic drying tool uses a microcontroller to regulate the work of DC blowers, L298N motor drivers, grain stirring DC motors, temperature sensors, and humidity & temperature sensors. In this tool using grain with a mass of 0.5 kg, 1 kg, 1.5 kg, 2 kg and 3 kg of grain drying time with an average time in each mass 36, 52.6, 65.8, 73.2, and 83.2 minutes with the same humidity and initial temperature ie 80% & 26º C and 120 Watt power. The results in the next process are with initial humidity of 40%, 50% and 60% with an average of consecutive times of 34.8, 47.8, and 63.2 minutes. And the results of the last testing process conducted in the morning with humidity and initial temperature of 89% & 20ºC, during the day with humidity and initial temperature of 80% and 26ºC and in the afternoon with humidity and initial temperature of 85% and 23ºC obtained an average time respectively 75, 52.6 and 63.4 Minutes. The standard humidity that has been set is 32%, the humidity is almost equivalent to the humidity of the grain that has been surveyed, which is 25% in the hot sun with a temperature of 35ºC. Keywords— Microcontroller, Grain Drying, DC Motor.

Design, Development and Implementation of Vibratory Mechanisms to Be Utilized in Dynamics and Vibrations Courses

There is still a demand for novel laboratory equipment designs that are to be utilized in undergraduate level machine dynamics, mechanical vibrations, control theory and their related labs. Since the turn-key systems preferred in most undergraduate labs are expensive and require wide lab space, 3D printed portable, small scale and cost-effective vibrational lab equipment are designed to study the fundamentals of free and forced vibrations. Four laboratory equipment designs are proposed in this study to demonstrate the fundamentals of vibration such as free vibration, forced vibration, modeling, base excitation and vibration isolation. The first device is a vibration isolator and resonator mechanism incorporating large deflecting fixed-free flexible links and composed of primary and secondary masses and a linear actuator, the second mechanism is a compliant parallel arm consisted of flexible beams, mass and a support, third mechanism is a translational vibratory mechanism comprised of slider carts, 3D printed springs, rods and bearings and the final mechanism is the model of driver seat consisted of DC motor, driver and driven wheels and a mass. Main parts of each apparatus are built by 3D printing using either PLA or PETG filament. Learning outcomes and the methods of implementing each device to the course and their associated laboratories are provided.

Speed Control of DC Motor using Fuzzy Logic Controller by PCI 6221 with MATLAB

This thesis demonstrates the importance of Fuzzy Logic Controller. The operation of a DC motor is performed using Fuzzy Logic Controller (FLC) in MATLAB environment. Fuzzy Logic is one of the most successful applications of fuzzy set in which the variables are linguistic rather than numeric. A Fuzzy Logic Controller (FLC) is based on a set of control rules (fuzzy rules) among linguistic variables. The proposed fuzzy controller results in a better response compared to the normal response of DC motor. This thesis consists of two parts; software and hardware implementation. The software part aims to design and develop a Fuzzy Logic Controller in MATLAB Simulink. The hardware Part Consist of DC motor Driver and PCI 6221. The DC drive is used to convert AC voltage into variable DC voltage PCI 6221 is used as the hardware interface between Hardware and Software.

Prototype Robot Waiter at Fast Food Restaurants

- On this day basic human needs are increasing. One example of this can be seen in terms of food, which until now has always been a major need. Fast food restaurants are in great demand by the public because cooking does not require a long time and so that many benefit from the presence of fast food restaurants. To improve service at fast food restaurants espesially for a waiter to efficient in providing food to customers we need research to be carried out on the design and implementation of robot servant prototypes in fast food restaurants automatically. This paper discusses the design and implementation of a prototype robot introduction of food at fast food restaurants automatically. The design begins with a prototype robot intended food delivery to customers in fast food restaurants. This robot moves with three wheels (2 front wheels are connected to the DC motor and the first freewheel that is behind) that moves through the track or line of trajectory to deliver food to the customer table. In addition, it is made also prototype restaurant accidentally in your own design and size that has been adjusted so as to simulate a fast-food restaurant. Prototype robot consists of several key components including the photodiode, push button switches, 3x4 matrix keypad, microcontroller AVR ATmega), DC motor driver and DC motor. The photodiode, push button switches and a 3x4 matrix keypad input (input) of the robotic system that will be processed by the microcontroller AVR ATmega 16 and will produce output (output) in the form of control of output devices such as motor driver DC. In this test, this robot can waiter function properly. For one time delivering food it takes 42 seconds to 1.13 minute. There was a time difference from the results of the trial due to a technical error from the robot while on the track.Keywords: ATmega16, Proportional Integral Derivative (PID), Photodiode Sensors, Robot Waiter