About: Ibrar Ayyub

If you’ve looked at television sets at any of the big electronics retailers in the United States lately, you know that digital TV, or DTV, is a big deal right now. Most stores have whole areas devoted to digital TV sets. You’re also hearing a lot about four other topics: HDTV and HDTV broadcasts Digital […]

Introduction This RFID reader works with 125 kHz tags in credit card size shape cards and with 125 kHz key fobs (picture 1). The EM4100 protocol is used. When you approach an RFID Tag close enough (4-5 cm) to the reader’s coil (L1) the reader will read the 10-digit unique ID of the Tag and transmit it […]

The first mobile Facebook users were only able to update their status using text messages. As smart phones got smarter, they were able to access Facebook’s mobile site, m.facebook.com, in their browsers. Then came the iPhone, the Android, and other advanced phone operating systems, which had app markets where users could download small programs made […]

The RFID (Radio frequency identification) technology steps-up in the modern age in the field of access system, identification, protection system and so many places. In this project, we are using this as an door opening as well as door closing system based on the RFID card number identification. This antitheft project is built to secure […]

The cellular electronic payment described in this scenario may seem futuristic, but consider that: TheTrainLine, a British train ticket retailer, is piloting a smart-ticketing system that allows riders to link train tickets to NFC-enabled cell phones such as the Nokia 6131. The rider buys tickets online using a mobile phone or PC. At the station, […]

I always like a challenge, so when I saw [simpleavr]s vusbtiny programmer, I started to wonder how small I could make an AVR programmer. All in all I’m pretty pleased with the result. The schematic is almost the same as the original one. I only added a LED an resistor to indicate a proper power […]

Whether you’re recording a podcast, musical track or field recording, you want to ensure that your audio is crystal clear every time. Condenser microphones are an excellent tool that delivers high sensitivity to capture subtle nuances and smooth frequency response [source: Apex]. Whether you’re plucking, drumming, singing or speaking, condenser microphones create high-quality audio. Read […]

The last step in my PCB design process normally is the silkscreen. When I try to design a nice helpful silkscreen, I often find my self wondering “How small can I make the text?” or “If I put this text over a via, will it still be readable?”. Usually I end up digging around some […]

The article How Electric Motors Work explains how brushed motors work. In a typical DC motor, there are permanent magnets on the outside and a spinning armature on the inside. The permanent magnets are stationary, so they are called the stator. The armature rotates, so it is called the rotor. The armature contains an electromagnet. […]

(Phys.org) —Sometime in the future, you will be at an art gallery where you are drawn to a nice-looking tree, or haunting line drawing of a woman’s face, or historical portrait, and you will wonder who is the artist. Eye the lower corner of the canvas and it will tell you, “David.” What you might not realize is that David is a robot—e-David, to be exact