About: Ibrar Ayyub

Console Let’s take a look at the components inside an N64, and what their capabilities are. [Be sure to check out How Video Game Consoles Work first for a general introduction to game consoles.] Processor: 64-bit R4300i “Reality Engine” Processor clock speed: 93.75 MHz Bus speed: 562.5 MB per second Co-Processor: “Reality Co-Processor,” 62.5 MHz […]

Introduction I bought the LED module from BanMor’ last week, just 30Baht. The moduleprovide a prewired multiplex of 4-digit common anode LED, that’s great.See the soldering pad of these signal in the 1st picture below. I thought,my friend gave me the AT90S2313 chip, and with a simple homemade ISP cableand a free software AVR ISP […]

Getting started The design I am testing is based on the Linear Tech LTC3731 three-phase synchronous buck controller. An example circuit from the data sheet is shown below. I am shooting for similar values, but this diagram shows the components of interest. A more detailed diagram of the control loop can be found in the […]

Common methods of reverse-voltage protection employ diodes to prevent damage to a circuit. In one approach, a series diode allows current to flow only if the correct polarity is applied (Figure 1). You can also use a diode bridge to rectify the input so that your circuit always receives the correct polarity (Figure 2). The […]

Mechanics of Virtual Laser Keyboards ­At their most basic, all keyboards, whether they’re physical or virtual, are input devices — once you type in a certain series of keystrokes, you’re telling the keyboard to deliver a command to your computer. This allows you to write in a word-processing document, close out a program or write […]

Introduction: The purpose of this project was to extend the Mixed Signal AVR simulator written in Fall 02 so that any single-issue microprocessor could be included in the simulation environment rather than limiting the simulations to systems based around ATMEL AT90S8515 series microcontrollers. In order to achieve this goal, a general architectural description language (ADL) […]

I. Introduction The Cornell University Airmouse Initiative is a motion sensing glove with buttons on it that plugs into your computer to function as a mouse. Many tasks that are performed on the computer require the use of both a keyboard on the mouse, and many people find it frustrating and awkward to have to […]

The idea Ardusumo is a universal platform to build robots on wheels that can move around avoiding obstacles using infrared sensors and follow routes marked with dark lines on a white background. We have created Ardusumo to bring young students to the world of robotics: if suitably programmed, Ardusumo allows robots to perform various autonomous […]

Why Do I Need To Convert from DC to AC? Most cars and motor homes derive their power from a 12-volt battery. In some cases, a heavy-duty 24-volt battery might be used. It’s important to know your vehicle’s voltage because the voltage rating of the inverter you select should match the voltage of the battery. […]

Time for a quick compo. I have two copies of the excellent book Raspberry Pi User Guide to give away! It will help you get speedily underway if you are new to the device, with chapters on the Pi as a Home Theatre PC, as a productivity machine, and serving as a Web server.