When developing software under a Linux system, the output executable file can be large or small. If the running environment is on a server, the resources may be sufficient, but if it is in an embedded environment, storage resources must be competed for every inch. Therefore, there will be a need to slim down the […]
Tag: strip
9. Circuit synthesis-microstrip circuit design based on arbitrary amplitude-frequency response of simplified real frequency
9. Circuit synthesis-microstrip circuit design based on arbitrary amplitude-frequency response of simplified real frequency Chapters 1-8 in the Overview of Network Synthesis and Simplified Real Frequency Theory Learning introduced some basic concepts and experimental methods of SRFT, and finally reached the ultimate use of SRFT, which is to directly synthesize a microstrip circuit given any […]
6. Circuit synthesis-design of SRFT microstrip line-cut Byshev low-pass filter based on simplified real frequency
6. Circuit synthesis – SRFT microstrip line-cut Byshev low-pass filter design based on simplified real frequency 5. Circuit synthesis – super cool – directly synthesize the microstrip line circuit diagram based on S11 parameters. We have already introduced how to synthesize the circuit diagram from the transfer function or S parameters. Here we introduce a […]
Stripping the pants of Kotlin intrinsic functions by looking at bytecode instructions
Exposing Kotlin intrinsic functions by looking at bytecode instructions There are many articles on the Internet about Kotlin inline functions. Most of them tell you the conclusion. Just use the xxx keyword and forget about it after a while. This article will guide you. From the JVM bytecode, I will take you step by step […]
5. Circuit synthesis – super cool – directly synthesize the microstrip circuit diagram based on S11 parameters
Circuit synthesis-super cool-directly synthesize the microstrip circuit diagram based on S11 parameters 1. Comprehensive principles and practice of circuits-comprehensive principles of reactance function 2. Circuit synthesis principle and practice-positive real function and instigated electrical impedance function 3. Circuit synthesis principle and practice-single and double-port ideal microstrip line (pseudo) hand calculation of S parameters and time […]
Java integrates stripe payment (subscription model and one-time payment)
1. First reference maven The API version of stripe needs to be corresponding to the calling version. Remember to check the API version corresponding to the stripe backend webhook. <dependency> <groupId>com.stripe</groupId> <artifactId>stripe-java</artifactId> <version>23.9.0</version> </dependency> 2. Use the checkout method to create an order. Please note that the subscription products are different from the one-time payment […]
Overseas payment: CheckOut method of Stripe payment
Recently I have been working on an overseas payment API, and I plan to record the process of my contact with it. API address: Stripe API reference – The review object – Java Online payment methods What I introduce this time is the CheckOut method to create link payment. package com.example.demo.stripe; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.JSONObject; […]
Use the NeoPixel library to call the Rpi-ws2811/2 light strip (without using sudo to start the light strip)
Table of Contents 1. Selection of light strips 1. Rpi-ws2811 light strip LED 2. Rpi-ws2812 matrix LED Second, try to use the Rpi-ws281x library to test the LED (you can ignore it if you try to solve the sudo permission problem) 1. Understand the light strip wires 2. Start the Raspberry Pi and connect to […]
Experiment on using Arduino WS2812 RGB light strip
Data download Link: https://pan.baidu.com/s/1OfaxDexNl3Lwj1GnbxnQnw?pwd=lx88 1. Overview The 12-bit RGB light ring is composed of 12 WS2812RGB lamp beads connected in series. Only one IO port is needed to drive this module. The WS2812 RGB lamp integrates a chip inside. We only need a single IO port to control the WS2812RGB lamp. The D pin is […]
Interaction between ESP8266 microcontroller and RGB LED strip: Simple C language RESTful API implementation guide
Part 1: Introduction and Background In today’s smart home era, RGB LED light strips have become a common decoration in homes, offices and public places. They not only add color to the environment, but can also be programmed to achieve various dynamic effects, adding fun to our lives. The ESP8266 microcontroller, as a cheap and […]