Previously we talked about Oscilloscope. Any DIY oscilloscope kit is quite challenging and also fun to build. Question is whether they worth buying & what types of kits are available. The other way of building DIY oscilloscope is avoiding these ready to use kits and assemble ownself. Second type is not discussed in this article. DIY Oscilloscope Kit : Basics Most of these … [Read more...]
Docker Tutorial For Beginners : Part 4 (docker compose)
We have previous three guides, one is how to install Docker and run it , second one is on some management GUI and Docker Part 3. docker-compose.yml file is a YAML file that defines how the Docker containers will in production. In Part 4 of Docker Tutorial For Beginners, we will talk about Docker Compose, which peoples say containers in production, docker-compose etc. Docker Tutorial … [Read more...]
Oscilloscope : Functions & Basics
Electrical engineering and electronics has two classic instruments since the beginning of history of the two engineering sciences - oscilloscope and function generator. Oscilloscope is an electronic visualization instrument for graphic representation of the electrical signals which can vary over time. Oscilloscope presents the values of the electrical signals in the form of coordinates in a … [Read more...]
What is Data Refining in Big Data?
Most commonly new developers, particularly who are interested in data analysis face some terminologies which have more to do with theoretical and practical part of engineering and analytical sciences. The developers can be from a variety of domains and the phrases often confuses them. The question what is data refining in big data such an obvious question and answer is commonly written for those … [Read more...]
Nokia 5110 Arduino Snake Game
Previously, we talked about Nokia 5110 wiring details. Here is circuit diagram and code to play Nokia 5110 Arduino Snake Game. This Snake is like original Nokia Mobile's famous Snake II game. Nokia 5110 is a versatile LCD display and capable to perform almost everything. The basic problem is inconsistent quality of these Nokia 5110 LCDs - these are refurbished from 2 decade old thrown away mobile … [Read more...]
What Are Mechanical Keyboards?
Have you heard of recent time craziness around the mechanical keyboards or though what are these mechanical keyboards? Mechanical keyboard keys are spring activated switches. We commonly use full travel membrane based keyboards for desktop keyboards and scissor switch keyboards for notebook computers. Mechanical keyboards are old fashioned, costly and feels somewhat closer to the old mechanical … [Read more...]
IBM Analytics Demo Cloud : Free Hadoop, Ambari With SSH
Normally we install Apache Hadoop and other big data tools on our servers. IBM Analytics Demo Cloud is intended to learn Hadoop, Ambari, BigSQL free of cost with SSH access & web console. With various cloud offerings many things these days have a free usage tier like we shown with unrelated things - Heroku and OpenShift PaaS. Here is how to get started with non-root access to this system. In … [Read more...]
Raspberry Pi Car PC System : List of Needed Hardwares
Previously we talked about DIN slot in Raspberry Pi Car Starter Guide and OBD II. Here is a list of hardwares needed to build Raspberry Pi Car PC System on ordinary old cars & a budget within $200 or so. You can use Orange Pi instead of Raspberry Pi, we talked about the single board computers in a separate article. The old illustration is possibly helpful : Raspberry Pi Car PC … [Read more...]
Docker Tutorial For Beginners : Part 3
In this series, first part of guide was on how to install Docker and use commands, second part was installation of some UI to visually check what is going on. In Part 3 of Docker Tutorial For Beginners, we will learn basics about Docker File, Port, Containers, Environment, Registry and Tag. Normally if we write a Python application, we install a Python runtime on the machine. But, with Docker, we … [Read more...]
Digital Vernier Calipers For Dummies
China is a country which manufacture and supply things at a cost which make precise, costly dirt cheap. Vernier Calipers is nothing new, all who had science in Twelfth Grade could use a vernier calipers. Needless to state that, most high schools made the interesting instrument a bitter topic by asking odd questions. Whether students of non-science can use the traditional analogue instrument that … [Read more...]
Rotary Encoder For Dummies : For Arduino, Raspberry Pi
Some theory better to know before buying rotary encoders. Here is rotary encoder for dummies guide intended for Arduino, Raspberry Pi users. Rotary encoders are like potentiometers but potentiometers do not have full rotation without limits unlike encoders. Rotary encoders output reflected binary code (RBC) (also known as Gray code) to inform how much, in which direction the encoder has been … [Read more...]