Definitely you have noticed the Arduino Relay Modules on Ebay, Amazon like online shops or may be on some blog sites. Many obviously wonder and ask what are Arduino Relay Modules, what they do? In very short, these relay modules isolate two circuits so that we can control 230V appliances with Arduino using relay. As the matter is with live 230V connection, not 9V battery, usage must be by adults. … [Read more...]
Hardware
Detailed article on computer hardware parts like RAM, Motherboard, Processor, Graphics card. Hardware also covers topics on hardware of Server, Single Board Computers like Raspberry Pi to Libre Hardware Projects.
Types of Fuses, Fuseholders Used in DIY & Household
Thomas Edison has patent on fuse. Fuse provides overcurrent protection to a circuit using basic theory. Thomas Edison never discovered incandescent bulb but he discovered the Edison screw mount and modified filament. Thomas Edison has not discovered fuse too. Who discovered fuse that is not known, he added a standard and Louis Breguet recommended such thing in mid 1850. There is another similar … [Read more...]
Types of Electrical Switches Used in DIY & Household
In DIY works, theoretical knowledge around them becomes a barrier - it happens that you noticed a thing in use and understood to be appropriate but the name is unknown to you. We are saying the theoretical English nomenclatures, for few in real life technicians to the shops refer them with different sounding name which goes worser in the non-English speaking countries. Here are the common types of … [Read more...]
DIY Oscilloscope Kit
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...]
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...]
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...]
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...]
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...]
Arduino 8 Digit 7 Segment LED Display Buying Guide
Unlike TM1637 4 digit 7 Segment LED Display, buying 8 digit 7 segment LED display is not so easy to take decision. These Are Driven By MAX7219/MAX7221 driver which supports LED dot matrix too. 8 digit is maximum number the driver supports. It is towards pure electronics, you can separately buy the basic electronic components and build on breadboard. Arduino has direct official support of the … [Read more...]