Variability in tea beverage concentration due to manual preparation can lead to inconsistent product quality and reduced consumer satisfaction. This study presents the design of an automated system to measure and control tea molarity using a Light Dependent Resistor (LDR) sensor and an ESP32 microcontroller. The system consists of one pump dedicated to concentrated tea addition, one stirring mo…
Increasing lettuce production can be done by intensification land used and implementing agroforestry. Anyway of others problems of land used of under annual crop areas is the low intensity of sunlight due to the presence of annual plant canopy that shades sunlight. This research aimed to determine the effect of various shade levels on the growth and yield of salada plants of Grand Rapids and Re…
Intercropping is planting pattern that cultivates more than one type of plant in a certain unit of time aimed at increasing productivity. This study was conducted to examine the size of the chaya plant crown and the density of mustard plants using an intercropping system in the area of chaya plants (Cnidoscolus aconitifolius) in order to obtain optimal production and growth results. This study …
Water spinach (Ipomoea reptans Poir.) vegetables that many people like because of their high nutritional content. Increasing water spinach production can be done by using land with minimal light intensity due to shade such as among annual plants, yards in urban areas. The aim of this research is to determine the effect of various levels of shade on the growth and yield of water spinach plants o…
Processing cow manure which has a high N, P and K content as compost can supply the nutrients the soil needs and improve the soil structure for the better. This research aims to determine the composition of a planting medium mixed with soil and cow dung compost that is suitable for supporting the growth of California papaya (Carica papaya L.). This research was carried out in Tanjung Pering, No…
Mustard is one of the vegetables that has many vitamins such as folate, carotenoids, and vitamins A, C, E, and K which are beneficial for human health. Increasing mustard production can be done by utilizing areas with minimal light intensity due to shading such as annual crops, urban gardens, and provision of paranet shade. The use of shade is one of the efforts to regulate the intensity of sun…
A prototype transceiver based on visible light waves has been successfully made using a white LED as a transmitter and photodiode and LDR as light detectors at the receiver. The data sent is text data with air and water transmission media. The test results show that the photodiode can transmit up to 82 cm in air and 80 cm in fresh water, salt water, room temperature and also cold temperature wa…
Visible Light Communication (VLC) is visible light communication using LEDs and lasers as carrier waves to transmit data. This research aims to design a VLC system transceiver prototype that is capable of sending and receiving text data bidirectionally using a laser as well as evaluating the application of photodiode detectors and Light Dependent Resistor (LDR) VLC systems in air and water. Two…
Light is the biggest influence for life in carrying out activities. All living things and their activities need light. Good or bad the influence of light depends on the needs of each. Measuring tools are needed by humans to facilitate their activities in finding the value or quantity of an object with certainty, because without a measuring device it is difficult to determine a standard quantity…
This research aims to optimize and characterize a new ion implantation technique to obtain emission from silicon that is fully compatible with mature CMOS technology. Silicon has the disadvantage of having an indirect band gap, which reduces the efficiency of light extraction from silicon. Therefore, carbon ion implantation on silicon in this study becomes the method used to enhance light extra…
seiring berjalannya waktu LED dimanfaatkan untuk beberapa hal salah satunya sebagai media transmisi komunikasi yang dikenal dengan visible light communication. Teknologi ini memanfaatkan cahaya tampak salah satunya cahaya dari LED untuk mengirim informasi. Oleh karena itu dilakukan penelitian komunikasi cahaya tampak dengan mengirimkan sinyal kotak dengan frekuensi 100Hz, 500Hz, dan 1KHz dari f…
Research on visible light communication in water has been conducted with a light source using a laser. The purpose of this study is to find out the performance of each color laser used by adjusting PWM (Pulse Width Modulation). The authors use three color lasers Red Laser, Green Laser, and Purple Laser. The medium used for data transmission is a 160 cm long tank or aquarium. The authors specifi…
Penelitian ini bertujuan untuk mengetahui kemampuan multirepresentasi mahasiswa calon guru fisika pada materi sifat-sifat cahaya. Jenis penelitian ini adalah deskriptif kuantitatif. Pengambilan data pada penelitian ini dilakukan secara online menggunakan google meet dan melibat 53 orang mahasiswa semester 5 Pendidikan fisika Universitas Sriwijaya tahun ajaran 2021/2022. Penelitian ini menggunak…
In the current era, technology has shown a very rapid development. This is evidenced by the large number of communication media, both wireless and wired. In this study, using visible light as a medium in the communication system. The communication system consists of a transmitter (sender) and a receiver (receiver) device. The transmitter device consists of a signal generator as an input signal …
Ikan tambakan (Helostoma temmickii) adalah jenis ikan rawa yang berpotensi untuk dibudidayakan. Fotoperiod atau lama pencahayaan merupakan salah satu faktor yang mempengaruhi pertumbuhan larva ikan budidaya. Cahaya mempengaruhi hormon pertumbuhan dan membuat larva lebih mudah makan makanannya. Tujuan penelitian ini adalah untuk menentukan lama pencahayaan yang terbaik terhadap pertumbuhan dan k…
Kemajuan teknologi penerangan hingga akhir abad XX telah menghasilkan berbagai gawai penerangan. Rekayasa lampu listrik sebagai sumber cahaya hingga akhir abad xx mengalami kemajauan yang sangat pesat sejak ditemukannya lampu pijar oleh Thomas Alpha Edison pada akhir abad XIX. Lampu yang berisi gas dengan modifikasi elektroda di dalamnya menghasilkan efikasi beberapa kali lebih besar di banding…
Penelitian ini merancang dan membuat sistem pemantau intensitas cahaya matahari menggunakan PC-Link USB Smart I/O dan komputer, yang data hasil pengukurannya dapat langsung tersimpan secara otomatis. Sensor yang digunakan yaitu LDR (light dependent resistor), sensor mampu mengukur intensitas cahaya matahari antara 0 lux hingga 50000 lux dengan resolusi 0,01%. Bahasa program yang digunakan …
Saat ini penggunaan citra digital sudah menjadi umum digunakan. Namun tidak semua citra digital memiliki visual yang memuaskan mata. Pencahayaan yang terlalu gelap atau terlalu terang merupakan salah satu faktor penyebabnya. Karena itu diterapkan algoritma retinex yang dapat mengakomodasikan perubahan warna akibat perubahan intensitas cahaya. Dalam penelitian ini, citra yang kekurangan cah…
Penelitian ini merancang sebuah prototipe jendela pintar menggunakan mikrokontroler ATMega 16. Jendela dan gorden adalah bagian dari sebuah ruangan yang berfungsi untuk menutup dan terbuka di sore dan malam hari. Membuka dan menutup jendela dan gorden adalah salah satu kegiatan yang sering dilakukan dalam kehidupan rumah tangga, dan biasanya sering lupa untuk menutup jendela dan gorden pada mal…