About: Ibrar Ayyub

Inductor Basics In a circuit diagram, an inductor is shown like this: To understand how an inductor can work in a circuit, this figure is helpful: What you see here is a battery, a light bulb, a coil of wire around a piece of iron (yellow) and a switch. The coil of wire is an […]

Meet Powah, a little power on/off toggle with an indicator LED. It uses a pair of Schmitt triggered inverters to debounce the button,  and a P-channel MOSFET to switch the power on and off. The board is designed to be plugged into a breadboard.   It is designed to mount on one end of my […]

Here’s an SVG image to Eagle polygon importer called svg2poly. It seems like an excellent alternative to the BMP importing plugin included in Eagle default package. [via]   Surprisingly often, I find myself wanting to import vector images into eagle, and have them appear as polygons – usually for silkscreen. Whilst importing vectors as lines […]

This is as simple routine how to read 4×4 keypad keys using AVR-GCC language. The keypad is connected to AVR microcontroller 8 bit port. In this example it is B port. You can change ports depending on your needs – this is only an example ant it is not the only way to this. Howt […]

Pendulum Parts Pendulum clocks have been used to keep time since 1656, and they have not changed dramatically since then. Pendulum clocks were the first clocks made to have any sort of accuracy. When you look at a pendulum clock from the outside, you notice several different parts that are important to the mechanism of […]

Macroblock MBI5030, 16-ch constant current LED driver with PWM, SPI-like interface, requires external grayscale clock. Known-good source: Kingelectronics, latest datasheets. The problem: you need the chip to figure out if your code actually works. And you also need the LEDs to see what’s going on – if at all. You could use a logic analyzer, […]

From How CDs Work, you learn that a normal CD uses microscopic bumps to store data. The surface of the CD is a mirror, and the bumps disrupt the mirror’s perfect surface. The laser that reads the CD can detect the difference between a perfect mirror and an imperfection caused by a bump because of […]

The Arduino Shield Webinar teaches you to create your own self-made Arduino Shields in no time! Free of charge! This webinar is for those of you who.. have great ideas that you want to get out of your head and into the physical world have learned the basics of Arduino and want to take your […]

Focusing on the Problem At the most basic level, a camera makes a record of light. When you photograph a scene, light reflected by the scene hits your camera’s lens. The lens bends the light and redirects it to the recording medium. In a film camera, that medium is a strip of chemically treated plastic. […]

Servo motors are so called “closed feedback” systems. This means that motor comes with control circuit, which senses if motor mechanism is in desired location and if not it continuously corrects an error until motor reaches proper point. Servo motors are widely used in robotics, remote controlled planes, vehicles. So they come in many shapes […]