As we like basic electronic components over shield, in this guide we will use the hardware, not the shields. We can not give warranty of working about shields. Here is new test codes for Arduino temperature humidity sensor DHT11, DHT21, DHT22 test code for hardware (not shields). 2 libraries needed. Our old guides like DHT11 with TM1637 7 segment display will not work with the new libraries. DHT22 … [Read more...]
Archives for October 2017
Arduino 8×8 LED Dot Matrix Display With MAX7219 : Code
Previously we shared many guides with TM1637 7 segment LED display. TM1637 was shown as it is mainly software based control, least knowledge on electronics needed. We actually discussed about MAX7219 in various articles like on increasing the number of pins of Arduino, This guide is on Arduino 8x8 LED Dot Matrix Display with MAX7219 code for testing for the beginners with one 8x8 LED Dot Matrix … [Read more...]
Apache 2.4 Disk Cache : How To Use And Why Not To Use
When you are using Apache2 server, then you are well aware of the fact that Apache2 is intended to be powerful, enterprise grade web server. Apache 2.4 disk cache is powerful cache and is content aware. Many users while trying to use old directives face no caching - that is intended to escape errors on many servers which are not closely managed. As Apache 2.4 has undergone many changes like HTTP/2 … [Read more...]
How To Learn Big Data : Free Courses and Resources
My knowledge is standard knowledge of any technology related businessman in any country. Around Big Data, I will not learn core matters what a data scientist need to know rather restrict myself within sysadmin related big data and some theories. On this website, we have lot of tutorials and guides on Big Data and Data Science. This is one of the rare website where you'll get complete idea around … [Read more...]
Which Size of Battery to Choose For Electronics Works : AA, AAA, D, C
Commonly available consumer grade batteries have many sizes like AA, AAA, D, C and all are of them are 1.5v but there are matters which need calculations. Which size of battery to choose for electronics works depends on how much load for how many hours we will put on them and how much current we want. This topic is one of the basic topic and for odd reason, AA batteries are more promoted in the … [Read more...]
What is Immutable Infrastructure?
Immutable Infrastructure is a concept which has reason to be present for developing softwares on virtual environments running Docker or LXC. This sentence possible does to clarify what is immutable infrastructure but provides an idea that we are talking about cloud, virtualisation, Docker, LXC and software development and deployment. Of course when there Immutable Infrastructure, there will be … [Read more...]
How to Increase the Number of Digital Pins in Arduino (Port Extender)
13+6 pins often a limitation of Arduino in projects where we need many pins. Here is how to increase the number of digital pins in Arduino. You know that 13 pins are digital. 6 analog pins also can be used as digital in this way : [crayon-69feef09271b5489635504/] So actually we can refer Analog Pin 5 in this way : [crayon-69feef09271b8070164973/] Technically we can use the TX/RX. But TX/RX on … [Read more...]
What is IBM Data Science Experience (DSx)?
We talked about Jupyter Notebook, IDEs for Data Science, Python packages for Data Science etc. It is normal to hear about IBM Data Science Experience. Definitely you noticed that we have not included it in our IDE or other lists. Then, What is IBM Data Science Experience (DSx) Which Can Not Be Listed Among Those Articles? IBM Data Science Experience is a platform for data science for working with … [Read more...]
List of Good IDEs for Data Analysis, Data Science
After Electron project developed, the number of IDEs, text editors started to spam the whole earth. Some are just another fork, some are unusable. We have tested excluding the junks from zillions of ides. Here is a List of Good IDEs for Data Analysis, Data Science. It is sane to think about using Microsoft Visual Studio Code or Atom Editor as main software unless except Data Analysis, Data Science … [Read more...]
Why Hadoop Distributions Like From Cloudera, Hortonworks Exist?
Normally we write guides on how to install using official Apache repository (or their Github repo) for Hadoop, Spark etc. If you are new in data science/big data, it is normal to ask yourself why Hadoop distributions like from Cloudera, Hortonworks exist?. Well, this matter is not unique for Big Data tools. This vendor matter starts from MySQL - original MySQL, MariaB, Persona … [Read more...]
Setup Visual Studio Code For IBM API & Bluemix on Mac
In previous series of guides we configured Microsoft Visual Studio Code for common things like Arduino, WordPress development and debugging. In this guide we will discuss how to setup Visual Studio Code For IBM API and Bluemix on Mac. We will integrate CloudFoundry, Bluemix CLI and IBM Developer CLI. There are additional plugins for Microsoft Visual Studio Code which are useful for many Big Data … [Read more...]