Dioda PIN sebagai Saklar RF

Banyak aplikasi di dunia RF yang membutuhkan pensaklaran sinyal RF dan menghubungkannya ke antena berbeda, filter berbeda, maupun melalui penguat sinyal. Salah satu saklar yang umum dipakai adalah relay namun karena menggunakan prinsip mekanis, seiring dengan waktu dapat mengalami kerusakan. Sebagai alternatif dari relay, diperlukan saklar elektronik, salah satu saklar elektronik yang umum dipakai untuk sinyal RF adalahLanjutkan membaca “Dioda PIN sebagai Saklar RF”

Diskursus Statistika tentang Hitung Cepat

Akhirnya, ada diskursus yang berarti oleh proponent dan opponent dari hasil Hitung Cepat. Beberapa masukan saya terima baik dari proponent maupun opponent, saya rasa masukan ini sehat demi terungkapnya kebenaran. Salah satu diskusi pertama yaitu mengenai simulasi 1000 TPS: sampel dalam qc itu adlj suara sah pemilih, bukan tps. tps itu adalah primary sampling unitLanjutkan membaca “Diskursus Statistika tentang Hitung Cepat”

Statistika 101: Ukuran Sampel untuk Data Proporsi

Background Saya menulis artikel singkat ini tentang ukuran sampel dan data proporsi karena melihat rumus yang beredar oleh Dr. Ronnie Rusli tentang rumus Quick Count, menurut saya rumus ini memiliki permasalahan, seperti yang saya jabarkan di artikel sebelumnya: https://josefmtd.com/2019/05/04/statistika-101-memberikan-pengertian-hasil-quick-count-pilpres-2019/ Rumus yang disampaikan Dr. Ronnie di-retweet oleh 2778 akun dan diberi like oleh 4808 akun. MenurutLanjutkan membaca “Statistika 101: Ukuran Sampel untuk Data Proporsi”

Adding Custom Libraries in KiCad (English)

When designing a PCB Prototype, the components you want to use are often not found in your favorite CAD software’s library, which made you have to add the component on your own. This short article will discuss how to make a library with all those components. For example, I’m going to make a library toLanjutkan membaca “Adding Custom Libraries in KiCad (English)”

Installing KiCad: Open Source PCB Designer Suite (English)

KiCad is an open-source software to create schematics, PCB layouts, and Gerber. KiCad can be used in Windows, Linux, and macOS, and licensed under GNU GPL v3. KiCad is made by Jean Pierre Charras, a professor in Grenoble University. KiCad is also sponsored by CERN and had several KiCad developments done under CERN employees. IfLanjutkan membaca “Installing KiCad: Open Source PCB Designer Suite (English)”

Automatic Position Reporting System (English)

Automatic Position Reporting System or APRS is a digital communication protocol between a large number of amateur radio stations that covers a wide area. APRS can be used to send several tactical information, such as weather, location, messages, and several special events or emergencies in real time. APRS system is made by Bob Bruniga (WB4APR)Lanjutkan membaca “Automatic Position Reporting System (English)”

LoRa Modulation Basics (English)

LoRa is a spread spectrum modulation technology patented by Semtech. LoRa is a derivative of Chirp Spread Spectrum (CSS) which lowers data rate to improve sensitivity. If you want to place LoRa in the OSI Layer, implementation of LoRa modulation exists on the physical layer and can’t be bound to other layers above it. This allowsLanjutkan membaca “LoRa Modulation Basics (English)”

Bluetooth HC-05 AT Commands (English)

Bluetooth is one of the simplest communication modules which can be bought at a relatively cheap price. HC-05 Bluetooth Module can be easily found in many online shop websites around fifty thousand rupiahs. Before we further out discussion, I’ll talk about several Bluetooth basic concepts Introduction Bluetooth is a wireless technology standard for short-distance communication.Lanjutkan membaca “Bluetooth HC-05 AT Commands (English)”

Raspberry Pi Zero Headless Setup (English)

Do you want to try playing around with Raspberry Pi? Maybe you have encountered several problems such as no monitor to configure Raspberry Pi, no keyboard to write the commands, or no LAN cable. Maybe you have the same problem as mine, owning Raspberry Pi Zero W which can only be accessed through Wireless, USBLanjutkan membaca “Raspberry Pi Zero Headless Setup (English)”

Install Python 3.6. On Raspbian (English)

Do you want to use Python 3.6 on Raspberry Pi? When you run Python in Raspberry Pi, the version called is usually v2.7. This blog post will discuss how to change the default Python 2.7 into Python 3.6. Before I begin the tutorial, I want to explain one thing which is commonly seen in LinuxLanjutkan membaca “Install Python 3.6. On Raspbian (English)”