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This study aims to design and develop an automatic drilling machine controlled by a computer-based system via a parallel port interface. The machine is intended to improve precision and efficiency in repetitive drilling tasks such as PCB fabrication and pattern-based production. Tests were conducted on repeatability, accuracy, working area dimensions, movement speed, and the performance of the electronic circuit. Results indicate that the machine achieved ±0.05 mm precision and a maximum feed rate of 500 mm/min. The system also demonstrated stable control signal behavior and consistent stepper driver performance in accordance with component specifications. This research proves that legacy computer hardware can still be effectively utilized in low-cost automation systems to support technical tasks requiring moderate precision.

The phenomenon that occurs in the load lifting system is the need for an efficient and reliable mechanism to move the crane hoist pulley vertically and horizontally. This study aims to design and test a crane hoist system that uses a DC motor and a stepper motor controlled by an L293D motor driver, and to develop an application based on MIT App Inventor to control the movement of the motor. The research method used is integrated hardware and software design, followed by testing the performance of the motor, driver, and the application developed. Testing was carried out under limited load conditions, to measure the motor speed, voltage, and current used at loads of 10 to 100 grams. The results of the study showed that the system can function well at varying speeds, and the motor is able to lift a maximum load of up to 100 grams with a speed that decreases according to the weight of the load. The MIT App Inventor application successfully controls the motor effectively via a WiFi connection with a maximum distance of 10 meters, and loads the operation of the crane vertically and horizontally. This study proves that the designed system is able to work optimally in lifting and moving loads, and the application developed provides easy and efficient control.

This research successfully designed and built a CNC drawing machine based on Arduino. The system utilizes NEMA stepper motors to move the X and Y axes, as well as a servo motor to control the Z axis. The Arduino Uno, supported by GRBL firmware, acts as the central controller that processes commands from the Inkscape software. The results of the research demonstrate that the developed CNC machine is capable of producing images with satisfactory accuracy. The appropriate selection of components and optimal parameter settings have contributed to the machine's reliable performance.

Penelitian ini bertujuan untuk merancang mesin router mini CNC 3 axis. Rumusan masalah penelitian ini adalah; bagaimana proses pembuatan mesin mini CNC dan bagaimana proses pengujian mesin mini CNC. Perancangan mesin ini dibagi menjadi beberapa tahap diantaranya; desain bagian rangka, bagian kelistrikan, bagian penggerak dan bagian sistem kendali. Desain bingkai menggunakan software Solidworks. Bahan rangka yang digunakan adalah alumunium dan ABS. Hasil analisa statik pada sumbu x mempunyai tegangan von misses maksimum sebesar 6,547 N/mm2 dengan beban sebesar 30 N dan pada sumbu y dengan tegangan von misses maksimum sebesar 11,805 N/mm2 dengan beban sebesar 50 N Motor stepper yang digunakan adalah motor stepper Nema 17. Daya yang dibutuhkan untuk motor stepper sumbu x sebesar 0,3297 watt, untuk sumbu y sebesar 0,471 watt dan untuk sumbu z sebesar 0,0785 watt. Sistem kendali pada mesin CNC Router 3 Axis ini menggunakan komponen Arduino UNO, CNC Shield Expansion Board, driver motor stepper A4988, Firmware GRBL dan aplikasi GRBL Controller.

Di dalam maupun di luar ruangan tong sampah sangatlah di butuhkan untuk orang banyak untuk kebersihan lingkungannya. Dengan adanya tong sampah bisa terjaganya lingkungan yang asri dan udara semakin sejuk tanpa adanya sampah- sampah yang berserakan di mana- mana. Pada penelitian ini tong sampah dalam pengaktifannya akan di buat secara otomatis agar lebih mudah penggunaannya yaitu dilengkapi dengan sensor adjustable infrared dan gerbang logika dan dikontrol menggunakan IC L293D dan diteruskan ke motor stepper . tong sampah akan bekerja secara otomatis sehingga mempermudah manusia untuk membuang sampah pada tempatnya, dan lebih efisien dalam penerapannya.dari hasil pengujian didapat sistem bekerja dengan baik sesuai dengan harapan yang diinginkan. Disini peran sensor adjustable infrared sangatlah penting yang dapat mempengaruhi tingkat keberhasilan sedcara menyeluruh.

Based on statistical data, every year there is an increase in population. This also happened to the increasing number of Catholics. The increase member in Saint Aloysius Church of Mojosongo isn’t accompanied by an increase of seating facilities, to solved this, a device was designed which will show seats that have been used or still empty through a viewer that will be placed near the entrance. The research method used in this study is a quantitative method. The number of seats used by in one block is 25 seats, the seat sample is 9 seats. Three (3) PIR sensors are placed above the row to the seat 2, where the direction of the PIR sensor is drived by a stepper motor with an angle is 22.61°. Detection alternated and sequentially starting from row A, row B and row C. In general, the seat detection system based on ATMEGA16 works according to the design. People can find an empty seat position by looking at the viewer (LED) and looking for LED lights that are not lit.

Robot lengan merupakan sebuah alat mekanik yang dapat melakukan sebuah proses manipulasi dengan mengguanakan lengan mekanik. Robot lengan dibuat menyerupai lengan manusia memiliki sifat fleksibel sehingga mudah digunakan untuk melakukan suatu pekerjaan. Robot lengan memiliki jumlah derajat kebebasan (degree of freedom) DOF untuk melakukan gerakan tertentu. Rancangan robot lengan ini memiliki 3 derajat kebebasan  atau 3-dof dimana setiap  joint  (sendi)  memiliki gerakan berputar atau rotasi yang dapat melakukan  pergerakan  pada sumbu x, y, dan z dalam ruang tiga dimensi sebagai acuan gerak robot lengan ini menggunakan 3 motor stepper sebagai pengeraknya. Ada berbagai cara untuk membuat sebuah rancangan robot lengan, salah satunya adalah mengunakan invers kinematik yaitu, mencari solusi untuk setiap sudut pada tiap motor stepper agar posisi end-effector dapat tercapai. Dengan harapan proses rancangan robot lengan ini dapat membantu pembelajaran mengenai perubahan gerak pada robot lengan untuk menggambar menggunakan invers kinematik.

This study aims to obtain an effective solar panel tracking mechanism using energy-efficient electric actuators. Furthermore, we designed and implemented a semi-active solar tracking system. A tracking system is proposed to control solar panel orientation using a moving mass, a spring system, and an actuator. The weight of the moving mass and the spring constant are optimized to reduce actuator size. A stepper motor was used for this case. This electric drive is not the prime mover of the solar tracker; hence, it works against mass elements lighter than solar panel weight as used in the active solar tracker. Experimental results suggest that the average power required by the stepper motor is 0.21% of the energy generated by the solar tracking system. The results indicate that the proposed solar panel tracker works satisfactorily to control solar panel orientation.