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  OT Power Grid System Development

Use PLC to Remote Control Circuit Breaker in Power Grid System Figure-00: Project Overview Diagram, version v0.0.2 (2024) Project Design Purpose: The objective of this project is to demonstrate how to utilize Programmable Logic Controllers (PLC) to remotely monitor and control circuit breakers within a power (grid/supply) system. Using a Schneider Electric circuit breaker, sensor, closer and PLC, the project will cover the physical hardware connections and provide a step-by-step guide for desig...

       2024-09-21 08:56:05

  Singapore ISP SingTel experiences nation wide service down

On 3 Dec, 2016, many people from Singapore found that they were disconnected from the world the moment they waked up. Their Internet Service Provider(ISP) SingTel, the largest ISP in the country, experienced a nation wide service down incident. The incident started at 8:21 am according to SingTel and all Internet service subscribers across the country are affected. The incident lasted for over 15 hours(The time this post is being written) and there is still no timeline for when the service will ...

   SINGAPORE,SERVICE DOWN,NEWS,SINGTEL     2016-12-03 09:33:46

  JavaScript efficiency catch up

JavaScript is a very flexible language, we can write JavaScript code freely with various styles, different kinds of codes will have different execution efficiency. Here we summarize some tips we get from our development. Efficiency of JavaScript itself JavaScript has execution context chain, closures, prototype inheritance, eval etc. It brings us some magic features, but it also introduces the performance issue, if we don't use them properly, it will affect the codes execution efficiency. 1. Glo...

   JavaScript,efficiency,event delegation,eval     2013-04-02 04:08:46

  A simple example of drawing bar chart with label using d3.js

D3.js is a very popular graph library to help developers draw various kind of charts using JavaScript in a webpage. It utilizes the SVG format supported by all major modern browsers and can help developers get rid of the old age of Flash or server side graph drawing libraries. In this post, we will introduce some simple examples of drawing bar chart with labels using D3.js.  First, let's see what will be the final look of the graph drawn. Below is the complete source code for this example....

   JAVASCIPT,D3,BAR CHART,LABEL,TUTORIAL     2020-05-16 23:25:40

  Facebook fires a few Chinese employees

There is a big news happening in the Silicon Valley in past few days. Facebook fired a few Chinese employees for bringing outsiders into Facebook's campus and canteen on a charged basis. It's well known that tech companies in Silicon Valley provide attractive welfare to their employees. We often heard about the news that lots of free service(including free food, free laundry, free massage etc) are provided to employees to encourage them to stay effective when working. This is good news and welc...

   Facebook,Chinese employee, Chummy     2015-09-03 07:39:05

  Set Real-Time Clock Unit for OT/IoT Device

Configure DS1307 RTC on BeagleBone-Black Arduino or Raspberry-PI Figure-00: Project Overview Diagram , version v0.1.2 (2024) Program Design Purpose: Real-Time Clock (RTC) modules are essential for maintaining accurate timekeeping in various applications, including system clocks, data logging, and alarm systems. In scenarios where devices operate offline, such as a ship's NMEA 0183 data recorder that logs engine and rudder data, or an RTU (Remote Terminal Unit) with real time state change config...

       2024-08-18 03:09:06

  How Charts Using Logarithmic Scale Provide Insight Into Your Business

In the dynamic realm of business, understanding data is as important as acquiring it. Analytical tools like charts, graphs, and tables aid in data comprehension. Among these tools, the necessary prowess of charts using logarithmic scale often goes unnoticed. Keep reading to know how this instrument can become a game-changer in your business analysis. Understanding Logarithmic Scale Before throwing light on its applications, it's crucial to understand the concept of a logarithmic scale. Unlike l...

   LOGARITHMIC CHARTS,BUSINESS SOLUTION     2023-12-09 02:34:17

  OT Railway System Development: How to Use PLC to Implement Land Based Railway Track Fixed Block Sign

Figure-00: Railway fixed block signaling system over view diagram, version v1.3 (2024) Project Design Purpose: This project aims to use Programmable Logic Controllers (PLC) with train detection sensors and train control signals to develop an automated OT system for railway track fixed block signaling control. The system will include a digital equivalent simulation to explain the logic of the track fixed block Automatic Train Control (ATC) mechanism for demonstration and training purposes. In th...

       2024-07-27 04:08:41

  Will camera be Android's next target after smartphone and tablet?

In Samsung's Mobile Unpack conference, Samsung announced one Android smart camera which supports 3G, 4G and Wi-Fi. This smart camera called Galxy Camera is equipped with the latest Android 4.1 system, 21 times zoom, 23mm ultra-wide-angle lens and 16 megapixel back-illuminated CMOS sensor, along with the OIS image stabilization technology. You can install various Android applications on this smart camera and edit photos and then share, it also comes with voice control function and cloud storage ...

   ILDC,Smart camera,Samsung,Android     2012-08-30 19:52:02

  Use Delve to debug GoLang program

If you don't know how to debug program, you are not a real programmer. gdb can be used to debug go program, but according to golang website, delve is a better option.   Note that Delve is a better alternative to GDB when debugging Go programs built with the standard toolchain. It understands the Go runtime, data structures, and expressions better than GDB. Below is a simple go program. package main type Person struct { Name string Age int } func main() { var me Person me.Nam...

   GOLANG,DEBUG,DELVE     2018-11-09 23:28:43

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