Introduction to DDR Circuits The RK3588 DDR controller interface supports the JEDEC SDRAM standard interface. The schematic circuit for 16-bit data signals is shown in Figure 8-1, address and control signals are shown in Figure 8-2, and power signals are shown in Figure 8-3. The circuit controller has the following characteristics: 1. Compatible with LPDDR4/LPDDR4X/LPDDR5 … Read more
Click the “blue text” to follow us The “Commodity Name and Coding Coordination System” (hereinafter referred to as the “Coordination System”) 2022 edition has added LCD modules. What components make up this module structurally? How does it differ from the familiar LCD monitors and LCD TVs? In fact, if one cannot distinguish between them, accurate … Read more
During the home renovation process, the renovation team discovered a screw connected to a cable, and the electronic device at the end of the cable turned out to be a CCTV camera. Although the casing broke after unscrewing the screw, I was still able to capture the internals of the camera (the following photos show … Read more
The industry’s smallest package contributes to the miniaturization of camera modules. The S-19255 series is the industry’s smallest package, utilizing a 1.0 mm square HSNT-4 (1010) B. The HSNT-4(1010)B package with external pins facilitates installation, ensures high mounting strength, and allows for automated visual inspection after installation. With the growing popularity of Advanced Driver Assistance … Read more
To acquire information from the external environment, humans must rely on sensory organs. However, relying solely on human sensory organs is inadequate for studying the laws of natural phenomena and production activities. To adapt to this situation, sensors are required. Therefore, it can be said that sensors are an extension of human senses, also known … Read more
As the technology maker movement heats up, more and more people are starting to understand what Arduino is, but many are not very familiar with its origins and history. Today, I will guide everyone to deepen their understanding of Arduino step by step. As shown in the figure below, Arduino is a type of convenient, … Read more
The following video is from Tree Information Technology. 【Copyright Statement】 Tree Technology is authorized to reprint. This account aims to disseminate quality resources to better meet the needs of Raspberry Pi enthusiasts. The work is publicly reprinted, source from Bilibili, open from the original text. The course is about Python programming for Raspberry Pi, recommended … Read more
Today, I will build a numeric keypad based on the Raspberry Pi Pico. I will create a simple orthogonal numeric keypad with 20 switches. Then, I will introduce how to install KMK firmware on it. KMK can be installed on Python-based microcontrollers. It is used for some simple projects, from numeric keypads to full-sized keyboards. … Read more
Hello everyone, I am a beginner in electronics. Today we will analyze an AC 220V to DC 5V resistive-capacitive voltage reduction circuit. The resistive-capacitive voltage reduction is a circuit that can convert AC mains power to low DC voltage with very few components and at a very low cost. It is often used in devices … Read more
Common Symbols for Potentiometers The resistance of a potentiometer, also known as its nominal value, refers to the resistance between its two fixed ends. The common symbols for potentiometers are shown in Figure 3. Switch Potentiometer Symbol 1. Enter the main interface of Multisim and directly select the icon button. 2. Next, click on BASIC_VIRTUAL. … Read more